How to turn on the welding machine

How to connect a welding machine?

To ensure that the welding process is as safe as possible and that no serious problems arise during it, you should figure out how to connect the welding machine. This requires taking into account several basic factors, such as location.

Type of device, location of ventilation, etc. Ventilation is one of the most important considerations when placing an inverter, as they are highly susceptible to overheating. You also need to pay attention to contact with dust.

Thus, connecting a welding machine can be a daunting process for beginners.

Connecting the welding machine to a 220 V generator

Basic recommendations and safety precautions

Connecting the welding machine begins with checking the network parameters. It must match the one indicated on the body of the equipment, since otherwise it cannot be used. Here it is necessary to observe the correct connection devices. Here it is necessary to use grounding and phase wires, which can consist of one phase or two phases and a neutral.

If the model has a function for self-regulating the input voltage, then it should be placed in a position whose value will correspond to the network voltage. A fixing screw is usually used to secure the position.

The device is connected to the network using an ordinary plug. It must be in good condition and meet temperature standards, as heating will occur during operation.

The plug must have a ground to which a special cable is connected. You also need to connect the ground cable to the appropriate terminal. The connection should occur close to the future seam, but at a safe distance.

A special clamp is used to secure it to a metal surface.

Step-by-step instructions for connecting a welding machine

If you do not know how to connect the welding machine, then you should follow the sequence of steps below. Naturally, before connecting, you need to once again check the integrity of the device itself, the functionality of the components, and also find out the operating voltage. To connect you should have the following things:

• Welding machine;
• Extension;
• Adapter.

Source: https://svarkaipayka.ru/oborudovanie/svarochnie-apparaty/kak-podklyuchit-svarochnyiy-apparat.html

How is the welding machine connected?

In order for welding work to proceed without unnecessary problems, you need to figure out how to connect the welding machine. Before connecting the unit for welding, it must be placed in a suitable location.

It is very important that nothing obstructs the air flow to the openings on the equipment body. Cooling is often intentionally increased. To do this, when connecting the welding machine, install a fan behind it.

It is very important to ensure that the unit does not come into contact with dust, as well as wet and aggressive vapors.

Homemade welding machine for DC welding.

Basic recommendations and safety precautions

Before you are going to connect the welding machine, be sure to make sure that the frequency and voltage indicated on the equipment case match that of the network. Connecting such equipment requires making the correct connections. For this, the following wires are used: a phase or 2 phases in combination with a neutral and a grounding wire, which is usually green or yellow.

Electrode position during welding.

If the welding machine model you have chosen allows you to set the voltage yourself, you should fix the switch in a position that would correspond to the voltage in your network. The position is fixed using a locking screw.

A plug is used to connect the welding machine. It is very important that it meets established thermal throughput standards. This plug must have a grounding lug. It is to this that the corresponding cable will be connected. This plug cannot be plugged into a regular household outlet. A fused socket is suitable for connection. An auto switch is also suitable.

You will need to connect the return ground cable to the appropriate terminal. You need to connect at the shortest possible distance from the future seam. A specially designed clamp is used to attach the cable holder to the protruding fragment of the electrode.

Before connecting the welding unit directly to the network, be sure to check how securely the plugs are secured.

Due to poor contact, the device will not work at full capacity and will quickly fail.

Figure 1. Connection diagram of the welding machine: 1-welding station; 2—three-core hose cable; 3 - transformer; 4-regulator; 5-grounding clamps of the unit body; 6 - single-core hose cable; 7-electric holder; 8 - ground wires.

There are quite a lot of schemes according to which the welding unit is connected. The most common connection diagram is shown in Fig. 1.

• Position 1 is a welding station;
• number 2 indicates a three-core hose cable;
• 3 - transformer;
• 4th position - regulator;
• number 5 - grounding clamps of the unit body;
• 6 - single-core hose cable;
• 7th position - electric holder;
• number 8 - ground wires.

Remember and follow all these rules when connecting the welding machine to avoid injuries and other unpleasant consequences. Failure to comply with the safety system of the welding machine may result in fire or electric shock.

If any of the power cables break, they must be replaced immediately. It is best to entrust this work to professionals.

Any repair and maintenance work can be performed only after the welding machine is disconnected from the network.

When connecting the welding machine, be sure to check the quality of the permanently laid and flexible wires. Check their grounding, continuity and insulation to ensure compliance with established standards. Don't skimp too much on grounding.

It is best to use flexible copper wire for it. If twists, cracks or other defects are detected, the wire must be replaced. The use of damaged wires leads to overheating and may cause damage to the welding machine. An important fact is the need to unwind the wires.

If this requirement is neglected, inductance will occur and resistance will decrease.

The voltage for welding machines is not standardized, so pay attention to the characteristics of the particular model you will be working with. When assembling such equipment, it is given a certain voltage level. The resistance value is not taken into account.

Step-by-step instructions for connecting a welding machine

Figure 2. Sequence diagram for connecting the welding machine.

After you have checked the integrity of the unit and all related components, and also established the voltage compliance, you can proceed directly to connecting your welding machine. For this you will need:

• the unit itself;
• extension;
• adapter for extension cord.

When connecting the device, you can refer to the diagram in Fig. 2.

The connection is made in a certain sequence, namely:

1. First, a plug is prepared with the appropriate thermal throughput parameters.
2. Select a socket with a circuit breaker or fuse.
3. The return cable is connected to the terminal.
4. The holder cable is connected to the electrode fragment using a clamp.

After you have done all this, the welding machine can be connected to the network. Most models have fairly short wires, so connecting them often requires the use of an extension cord. The extension cord must have a wire of sufficient cross-section. The reliability and safety of operation depends on the number of intermediate connections. The fewer there are, the better.

Connection features depending on the type of device

Figure 3. A transformer-type welding machine can operate in a wide range of welding current. It is recommended to connect it to the shield.

The procedure for connecting the welding machine largely depends on the features of its device. So, if a two-phase model is used, the wires will be connected in an individual sequence.

The first wire will need to be connected to the phase, the second to the neutral output, and the third wire to be connected to the protection. If you work with a three-phase welding machine, then you don’t have to follow a special sequence.

The main thing is that the first 2 wires are connected to any phases, and the third wire is connected to the protection.

It is very important to know the basic features of connecting a transformer-type device. A typical representative is shown in Fig. 3. If such equipment is used, the connection is made in accordance with a number of special rules.

Transformers can operate over a wide range of welding currents. When some of them are plugged into an outlet, a fairly powerful surge of current is generated, which can burn the outlet and turn off the circuit breaker. Therefore, it is recommended to connect such a welding machine to the shield.

A detailed connection diagram for the welding transformer is shown in Fig. 4.

Be sure to follow these rules while working. If they are not followed, you risk injury that could easily be avoided. As a result of incorrect connection of the welding machine, you may receive an electric shock, a decrease in the quality of welding, fire, etc.

Possible problems after connection

Figure 4. Connection diagram for welding transformer.

After connecting the welding machine, various problems may arise, for which you need to be prepared and know how to get rid of them. If there is strong heating of the windings and humming, then the reason lies in a turn short circuit in the primary windings. In this case, you will have to completely or partially rewind the windings.

Welding transformers may produce too much current due to a short circuit in the regulator winding or in the secondary winding. To eliminate the malfunction, you need to eliminate the short circuit in the windings or rewind.

If, when exposed to the regulator, the welding current does not decrease, then the reason, as a rule, is a short circuit between the terminals of the regulator.

While working with the device, you may hear an uncharacteristic hum. It usually appears due to weakening of the spring tension or due to a broken wire.

The cause of excessively hot contacts in connections is usually faulty electrical contact. You can get rid of this malfunction by rebuilding overheating connections. The contact surfaces are cleaned and fit tightly. The clamps are tightened until they fail. Good luck!

Source: https://moyakovka.ru/instrumenty/podklyuchenie-svarochnogo-apparata.html

How to properly connect an inverter welding machine

Reading time: ≈5 minutes

So, you have purchased your first inverter welding machine. You will probably find an instruction manual included with it. Having carefully studied it, you will find that only a few general phrases are said about the correct inclusion. Is it really that simple? Plug the plug into the outlet and that's it? Alas, no.

An inverter-type welding machine is a complex device with its own nuances and features. By thoughtlessly plugging it into a household outlet, you risk losing the device itself or the wiring in the house. So how to connect a welding inverter correctly?

In this article we will briefly describe how to connect a welding machine to a 220 Volt home network and what should be taken into account.

Pre-check

Before you learn how to properly wire a welder, you need to make sure that the wiring in your home can handle the welding job.

Inspect the sockets, how old are they? If the outlets have not been replaced for more than 25 years, most likely all the wiring in the house is also old. This is not critical if it can withstand high current values. But often old wiring brings nothing but problems.

You are unlikely to be able to use modern welding wires with the machine if the power supply in the house is far from ideal.

https://www.youtube.com/watch?v=8dR1RfoteHc

You don't need to be an electrician to understand what will happen if you connect a powerful modern welder to old sockets. At best, you will be left without electricity. In the worst case, all your neighbors will be left without electricity, and your electrical appliances will simply fail.

In a word, check first whether your wiring can withstand the load. If you find that it can't, don't despair. This problem can be solved. We'll talk about this later. In the meantime, below is a diagram of connecting the welding machine.

Application of a current generator

So, you checked your wiring and it turned out that connecting a 220V welding machine is simply impossible. What to do in this situation? You can use a third-party current generator.

And at this moment, many immediately begin to remember that they keep an old gasoline generator in their dacha, which more than once saved them from sudden power outages. On the surface, the use of such generators seems like a pretty good idea, but in practice everything is different. Often, all gasoline generators are low-power and are not capable of providing a voltage of more than 5 kW for a long time.

As you understand, connecting a welding inverter to a low-power gas generator is simply pointless. To find out how much power you need, simply multiply the amperage you'll be cooking with by the voltage.

Let's take the most popular situation: you are welding with a 3 mm electrode with a current of 120 Amps and a voltage of about 40V. We multiply 120 by 40, we get 4.8 kW. This is the minimum power that a gas generator must provide. But in the calculations we did not take into account the efficiency of the welding machine, which is less than 100%. To ensure uninterrupted operation of the inverter you need at least 6 kW.

In general, a gas generator is a choice for those who no longer have any opportunity to obtain an additional power source. Ideally, before purchasing an inverter, you should check all the wiring and, if it is unsuitable, buy a welder with a built-in generator. Yes, these models are expensive and very bulky. But this is the most convenient solution to the problem.

If this solution is inconvenient for you, then you can buy a special current stabilizer for the welding machine. It connects directly to the welding inverter. This solution is suitable for a more or less stable power grid.

Use of extension cords

The topic of extension cords does not relate to connecting a welding machine, but these two issues are related. The fact is that if you select the wrong extension cables, the voltage may drop and the efficiency of the welding machine may decrease.

Why are extension cords needed? After all, the kit already contains quite long wires, usually up to 2.5 meters. At first this may be enough, but over time you will want more freedom for your actions. Especially if the device is heavy, and you need to move around the entire summer cottage or cook at height.

Therefore, we decided at the same time to tell you about connecting extension cables. First of all, remember that they cannot be used thoughtlessly. You need to accurately calculate what cross-section the extension wire should have. The maximum power that the wire can withstand will depend on this.

Let's give a simple example, using the same numbers from the previous example. Let's say we need a welding current of 120A. Wire cross-section 2.5 sq. mm. gives us 16A. Accordingly, for welding with a current of 120A, we need a wire with a cross-section of at least 12 sq. mm. We recommend choosing extension wires with a spare cross-section. Also remember to untangle them before welding so that it cools better. And don't forget about grounding. This is the simplest safety rule.

Also, do not buy several short extension cords and connect them together. It’s better to decide in advance on the required length and buy one wire. This way you will reduce the likelihood of a decrease in the efficiency of the welding machine. In addition, the contact connections of the extension cord will last you much longer.

Source: https://MyTooling.ru/instrumenty/kak-pravilno-podkljuchit-invertornyj-svarochnyj

How to connect a welding machine

Before welding, at a minimum, you need to understand how the welding machine is connected to the existing network, as well as what conditions must be observed.

To quickly and efficiently connect the welding machine, you should follow the current operating instructions for devices of this class.

Of greatest interest from the point of view of the features of this process is the connection of a welding inverter, most often used at home.

Safety regulations

The connection diagram for an inverter welding machine is quite simple and allows the device to operate in a cyclic (intermittent) mode, which allows for maximum welding efficiency. Before plugging into a socket, you still need to read the connection instructions, check the network parameters, completeness of the equipment and the external integrity of all its parts .

Options for connecting the inverter to the network

The instructions should clearly describe how to properly connect the welding machine, and also stipulate the procedure for its safe connection to the current electrical network. The need to check plugs and circuit breakers installed in the power supply circuit is specifically stated.

The fact that in old houses aluminum wiring does not allow working with currents above 10 Amperes should also be taken into account. Therefore, before connecting converters to the network, it is necessary to find out their rated power and current consumption.

When assessing the power taken from the network, one should not forget that when the device is turned on, there is a sharp surge in the starting current, the value of which can exceed the rated value several times.

Before connecting the device and welding work, the operator must fulfill the following requirements of the operating instructions:

1. remove foreign electrical devices (computers, transmitters, measuring instruments) from the device body;
2. when working with inverter equipment, the workplace must be cleared of all other interfering objects;
3. The rooms in which the welding unit is located must be equipped with a forced ventilation system.

To avoid emergency situations, before connecting the welding machine for the first time, it is recommended to test it in various welding modes.

Turning on the device (operating instructions)

When considering the operating conditions of a welding inverter, first of all, you need to pay attention to the following points:

• the normal duration of the current load should not exceed 5 minutes;
• in practice, the so-called “three-minute cycle” is usually used, which is two-thirds of the full load;
• If strong heating of the case is detected, the device must be turned off until the causes of the overload are determined.

Welding using an inverter machine requires careful preparation, since dangerous situations are possible when working with equipment of this class. Before starting welding work, the operator must fulfill all the requirements of the operating instructions, including choosing the appropriate current mode and electrode type .

Connecting the inverter to the network and putting it into operation is allowed only after meeting safety conditions, including the use of sockets and plugs of the appropriate standard.

When operating a welding machine, you should use special coated electrodes (MMA type).

The thickness of MMA electrodes is selected based on the mode and type of metal to be worked with. Typically, the thicker the metal, the greater the current required and, accordingly, the diameter. The most common ones used at home are 2 and 3 mm electrodes.

Before starting welding, make sure that the electrodes are dry. The wire going to the torch is connected to the minus terminal, after which the gas hose is connected to the reducer located on the cylinder if welding is performed in a protective environment.

When connecting via an extension cord, you need to pay attention to the cross-sectional diameter of its cable. The cross-section must be at least 1.5 square meters. mm for working with current up to 16 A. The wire must be completely untwisted so that there is no inductance, which, after connecting the welding machine, will create additional resistance.

Launch Mode Features

The inverter is put into operation by pressing the “Start” button, which leads to a state of complete readiness for welding procedures. To start welding in a protective gas environment after connection, just slightly unscrew the torch valve, install the desired electrode and “strike” it on the workpiece to be welded.

When considering starting an inverter, the following must also be considered. The fact is that any inverter device is equipped with a soft start device that prevents the failure of the electronic elements of the circuit from a surge of current.

Despite such protection, current surges when turned on can reach values ​​of the order of 40 Amperes, which are dangerous not only for the outlet, but also for the existing electrical network due to the strong “sag” of voltage.

During current surges within the above limits, the mains voltage may decrease (“sag”) from 220 to 130-140 Volts.

It is recommended to connect the power supply circuit of the device to the terminal contacts located directly on the distribution panel, where the grounding bus is also supplied separately. For a machine installed in an input device, such voltage drops are less dangerous.

The situation with inrush currents is significantly simplified when linear rather than phase voltages are used to power the inverter. However, this option can be implemented only for devices designed for 380 Volts and provided that the house is connected to a three-phase network (generator).

When considering the features of putting an inverter device into operation, one should not forget the features of adjusting its load current, which is carried out automatically (using a special control unit). Setting elements that set the control limits are located on the front panel of the device.

Compliance with the instructions for connecting pulse converters is mandatory for all models of welding devices without exception. Only if the starting conditions for inverters are met is it possible to maintain their functionality and guarantee high efficiency of the welding process.

Source: https://svaring.com/welding/apparaty/podkljuchenie-svarochnogo-apparata

How to properly weld with inverter welding for beginners: alternating and direct current, cable cross-section

If you are going to do welding work yourself and decide to do it using an inverter machine, you need to understand in advance how to work with a welding inverter.

Then read this article: everything written here will be useful to you.

Preparing, purchasing, stocking up

The most important thing is to know that everything will work out perfectly, because inverter welding technology is very easy to learn and use; experience and skill are not particularly needed here.

Safety precautions

Any welding activity, including an inverter, is directly related to electrical current.

These rules are simple and straightforward:

• It is necessary to check the cables for integrity and serviceability before connecting to the inverter. It is important to remember: the return cable with a clothespin goes to the negative pole. We attach the cable, where there is an electrical holder, to the positive connector.
• After a visual check, set the current control knob to the minimum value. Then we connect the device to the network. We listen to the operation of the fan when it turns on: if the noise is smooth and without crackling, everything is in order.
• Now let's take into account the considerable weight of the metal with which you will have to work.

Workwear

First of all, you need to take into account the effect of high temperature and have the following items:

• welder's mask with special light filters;
• protective gloves or gaiter;
• suit made of protective fabric;
• shoes with rubber soles;
• if necessary, a respirator if welding takes place in a closed room without ventilation.

Equipment

List of required equipment:

• inverter welding machine;
• hammer;
• electrodes selected for the type of work, taking into account the nature and thickness of the metal;
• metal bristle brush

Let's start cooking

First we set the correct current strength on the inverter. We remember that in inverter technologies, alternating current welding is the main type. The strength of the welding current depends on the composition of the electrode and the diameter of its tip, the position of the workpieces during welding and the type of seam in the planned joint.

All these dependencies can be found in the comprehensive instructions for the device itself and in the inserts in packs of electrodes. Theoretically, the welding current can be selected according to the diameter of the electrode rod: for each millimeter of diameter there should be about 30 A.

We find a comfortable and stable position, put on a mask and begin work with the elbow abducted. It is better to wrap the forearm with a cable. If this is not done, your hand may get tired during welding, and the cable will begin to dangle, which will negatively affect the quality of the weld.

Direction of electrode movement for a novice welder.

For debut work, it is better to choose metal blanks that are not the smallest size - more than 20 cm, this will be more convenient. As beginners usually do: put on a mask, ignite an electric arc and immediately, with one breath, pass the workpiece along the entire length of the seam.

If your part is short and you weld it in one breath, you may develop the unnecessary habit of welding the seam in one breath. Therefore, train on long parts with proper breathing.

Now about the arrangement of objects during work. It is better to place the workpieces on a work table - a horizontal surface. The electrode in the holder should be at right angles to the table plane, then the angle of inclination should be approximately 30°.

Now you need to ignite the arc to move along the planned weld.

It must be remembered that when burning, the electrode shortens, so the distance above the surface must be constantly monitored.

Now about the arc and electrodes

Quickly igniting and holding the arc correctly is perhaps the most important thing for successful welding with an inverter. The arc should not be interrupted - this is what you need to watch out for when the electrode approaches the workpiece plane.

In this case, you should tap the electrodes longer so that the film breaks. The relationship between welding current and electrode diameter can be easily calculated using tables that are available in large numbers on the Internet.

Functional diagram of welding with an inverter.

If you have an advanced inverter model, then it is equipped with additional functions that make life easier for beginners and everyone else.

These advanced features are:

• The Hot Start or HotStart function makes it easier to ignite the electric arc.
• Anti-sticking or arc forcing is activated when the electrode approaches the metal surface too quickly. This function increases the current level.
• Antistick or AntiStick, on the contrary, turns off the current to prevent overheating of the welding machine.

It is better to learn from the simplest form of seam - a thread seam, for which the electrode must be guided evenly without any oscillatory movements.

Once you start to feel comfortable with the thread technology, you can start welding metals with oscillating movements in different configurations - there are several of them.

In such cases, you need to make the first few oscillatory movements to form a weld pool. We tilt the electrode at an angle of 30°, no more and no less. Once the pass is completed, you need to beat off the slag crust with a hammer to clean the new seam using a wire brush.

In order for the seam to come out high-quality and aesthetically pleasing, at the end you should make a couple of oscillatory movements towards the metal surfacing. In this way, crater formation can be avoided.

About welding seams

The seams that are formed using inverter welding are as follows:

• single-pass, in which the thickness of the metal workpiece is replenished in one pass;
• multi-pass, in which one pass of electrodes is not enough. Used when welding thick edges.

The most famous and simple way to check the quality of a seam after welding is to tap it with a hammer. At the same time, the slag layer bounces off - provided that the seam is even and smooth. Also, the quality of the seam depends on the temperature: it must be correct.

If the seam is overheated, it may break; if the heating is insufficient, a very unpleasant thing will happen - lack of penetration.

Polarity forward and reverse: what is the difference

Polarity in welding on an inverter machine is an extremely important thing that you need to understand.

At its core, polarity is the direction of electron flow, which depends on the order in which the cables are connected to two different connectors on the device. Inverters have the ability to select the type of polarity. The welding current can also be adjusted.

Reverse polarity

Types of polarity for welding.

This is the negative pole on the metal workpiece, and the positive pole on the electrode. The current thus moves from minus to plus, that is, from the metal to the electrode. With this method, the electrode gets quite hot. The method is good when welding thin metals as the risk of burn-through is reduced.

Straight polarity

Here it’s the other way around: the negative pole is on the electrode, and the positive pole is on the metal of the workpiece. The current now flows from the electrode to the part being welded, which in this case heats up more than the electrode. This is how they work with thick metal edges.

It should be noted that the polarity is always indicated in the instructions on the packs of electrodes.

One of the main “inverter” questions from debutants is what is the most optimal polarity when welding with an inverter? The answer depends on many criteria, but from the point of view of cutting metal, the polarity should be straight.

The fact is that with this type of polarity, the molten area turns out to be deep and narrow - just what is needed when cutting.

With reverse polarity, the opposite is true: the melting zone is shallow and quite wide.

Cook, cut

If you are working with thin sheets of metal, you need to choose the right small diameter electrode and welding current. If, for example, the edge thickness of your part is 0.8 mm, the diameter of the electrodes should be 1.8 mm. Well, the welding current should reach 35 A. You need to cook using intermittent movements.

The question of which electrodes to weld with is decided taking into account the type of welding and the nature of the metal.

We ignite the electrode and place it exactly at the location of the planned hole. Press for good heating. We rearrange the electrode, press and heat again. And so on until a hole of the desired shape and size is cut.

If you are cutting sheet metal, the sheet must be fixed vertically. In this case, drops of molten metal will flow down, otherwise you risk getting frozen metal icicles at the bottom of the cut.

To be honest, all cutting of metals with a welding machine, even with the most advanced inverter, is not the best idea from a technical point of view. There is always a risk of metal melting at the cut site - the metal can simply melt out. The best way to cut metal is with a grinder.

We choose, we buy

Table of characteristics for welding with an inverter.

It would be useful to google and read about domestic and foreign manufacturers whose products are offered on the Russian market. These are mainly European and Asian countries.

Equipment from Asia is usually inexpensive and of very decent quality, with the exception, of course, of handicraft fakes.

European inverters are distinguished by qualities with the obligatory adjective “high” in front: high price, high reliability, high quality. There are few Russian devices on the market.

Understand the brand of welding cable and its cross-sectional area. The right choice will help you avoid difficulties with power surges if they occur during welding.

The second thing to do is figure out the availability of service centers around the country. If you live in a city with a population of one million, a service center for a specific product is unlikely to be a problem for you. But if you live in a remote region, this issue will become one of the most important for you.

But the main thing is protection from ultraviolet radiation from a hot arc. The most primitive option is a mask made of plastic and a light filter, which is selected depending on the current strength, lighting and your vision.

A more expensive and much more comfortable option is a mask with a Chameleon-type light filter, which automatically changes its characteristics and can be adjusted to suit the ambient light and the condition of your eyes.

There are many tables on the Internet with data that will help you choose the right filters. It is better to choose them for a number larger or smaller. The best solution would be to check the lighting in the work area and your vision.

Okay, we agree, you don’t have to buy a whole suit made of special fabric. But a canvas apron with gloves is not a whim, but your protection. It is better to choose mittens from split leather. Pay attention to your shoes: be aware that drops of molten metal may fall on your feet.

How to care for the inverter?

Any equipment loves care and order, your inverter is by no means an exception. The rules on how to properly cook using inverter welding and how to store it correctly are simple.

Selecting an electrode for welding various metals.

Before work you need to do the following:

• carry out a visual inspection of the device and prepare the place where you are going to work;
• install the inverter in a horizontal position with the desired protection from dust, precipitation and other contaminants;
• connect the cable to the connectors in accordance with your plans, usually this is plus to the electrode and minus to the metal;
• connect power supply. The most important nuance: if you use an extension cord, the cross-section of the welding cable must be at least 2.5 mm².
• ignite the arc at separation as a test test;
• make sure the casing is intact, because cooking without it is strictly prohibited;
• adjust the current mode. You can start cooking.

You must store your device according to the following rules:

• Constantly check all components of the device. The frequency of checks depends on the intensity of use of the device and the degree of dust in the work area;
• Clean the device from dust using compressed air and low pressure. Do not clean the electric plateau with a jet of air, but use a soft brush;
• check the strength of power connectors, the integrity of the plug, socket and insulating coating of electrical cables;
• It is better to store the inverter in dry conditions, the air temperature should be within the range from -15°C to +50°C, the optimal air humidity is about 70 - 80%.
• Remember to disconnect the inverter from the network when it is not working.

Source: https://tutsvarka.ru/vidy/kak-pravilno-varit-invertornoj-svarkoj

How to connect a welding machine - Welding Pro

Reading time: ≈5 minutes

So, you have purchased your first inverter welding machine. You will probably find an instruction manual included with it. Having carefully studied it, you will find that only a few general phrases are said about the correct inclusion. Is it really that simple? Plug the plug into the outlet and that's it? Alas, no.

An inverter-type welding machine is a complex device with its own nuances and features. By thoughtlessly plugging it into a household outlet, you risk losing the device itself or the wiring in the house. So how to connect a welding inverter correctly?

In this article we will briefly describe how to connect a welding machine to a 220 Volt home network and what should be taken into account.

Instead of a conclusion

Connecting the inverter to the grid is a simple process. You just need to learn everything once and then follow the rules. In addition, these rules also apply when you need to connect a 380V welding machine. If you have a transformer or semi-automatic in your arsenal, the algorithm of actions will not change either. We wish you good luck in your work!

Source: https://fgpip.ru/drugoe/kak-nado-podklyuchat-svarochnyj-apparat.html

How to use a welding machine correctly

Welding machines are devices that are used to permanently join metal parts using heat generated by electrical energy. They are available in a variety of sizes and output voltages, from a small model with 80A output to an industrial model with 12,000A output for spot welding. So, how to use a welding machine? This and much more will be described in the article.

Description of equipment

Resistance welding equipment is used in a group of processes in which metals are joined by heat generated by the resistance of the welded object to electrical current, in the circuit of which the object is a part, and by the application of pressure. External device device:

• belt;
• frame;
• display;
• current adjustment;
• power button;
• overheat indicator;
• ventilation grille;
• cable connectors;
• support legs.

What does a welding machine look like?

Internal structure of the device:

• power block;
• control block.

Operating principle

The internal structure of the device is a transformer; it uses one active core, which is necessary to regulate the amount of current. When the machine is connected to a power source, the secondary coil generates an open circuit voltage due to induction. To achieve easy arc ignition and burning, the open circuit voltage must be at least 60 V. For safety reasons, the maximum voltage does not exceed 80 V.

Welding tools

Below are the main tools you may need for the job:

Working with a welding machine

They are necessary to protect welders' eyes from flying sparks and debris. Glasses must have untinted clear lenses.

Automatic darkening welding helmets protect the welder from flying sparks and shrapnel hitting the face and also protect the eyes from fluorescent spark.

A jackhammer is used to remove weld slag and spatter from welds.

A wire brush is used to clean debris before, after and between each pass to avoid contaminating the seam.

A pair of MIG welding gloves have free wrist movement and durable finger pockets.

Tools

Earplugs can help maintain concentration by blocking out external noise and also preventing ear damage.

A high quality industrial soapstone marker is used to mark metal and identify where welds should be made.

MIG pliers are important components of a welding kit.

Instructions for Beginners

There is no single welding algorithm, so the following factors must be taken into account: the type and thickness of the metal that needs to be welded, how large the volume of work is, whether the work is being done indoors or outdoors, etc.

Welders

Today, the most widely used form of welding is electric arc welding, in which an electric arc melts an electrode (such as a welding wire) and partially melts the base metal. As the molten metals cool, the parts melt together.

The machine's owner's manual will tell you what you need to do this, and there will usually be instructions on a flip panel on the side of the machine.

Note. For a cleaner weld, use 75 percent CO2 and 25 percent argon.

Working with the device

During the welding process you may need:

• Right angle grinder: for grinding, beveling and flattening weld seams and for surface preparation.
• Miter clamp or square magnet: for securing connections.
• Jackhammer and Wire Brush: For clearing debris and spatter.
• Welding pliers: for cutting wire and removing spatter from the gun nozzle.

Weld preparation

You should use a wire brush and acetone to remove oils and dirt. If metal needs to be cut, you should mark the line with an awl or carbide scribe and trim it.

Equipment

Welding with an inverter machine

Most of the welding performed falls into the arc welding category. So, what is this category and how to properly weld with an inverter welding machine?

Arc welding uses an electric arc to melt work materials as well as filler material (sometimes called welding rod) for welding joints. Involves attaching a ground wire to a welding material or other metal surface. Another wire, known as an electrode wire, is placed on the material to be welded.

Welding machine

Feeding filler into a weld joint requires strong hands and attention to detail. As the rod melts, the welder must continuously feed filler into the joint using small, steady movements back and forth. It is these movements that give welds their distinctive appearance.

Shielded metal arc welding, gas arc welding (or MIG welding), and gas tungsten arc welding (often called tungsten inert gas welding or TIG welding) are all examples of inverter arc welding.

Working with a welding machine

Security measures

As representatives of working professions say, safety measures are written in blood. Therefore, their observance saves the lives and destinies of workers. Here are some of the many when working with a welding machine:

• You should always wear an appropriate protective mask.
• Always wear proper gloves.
• Always wear ear protection to prevent sparks from entering your ear canal. An eardrum pierced by a spark is instantly cauterized and never heals.

Attention. You should never weld near anything that has been cleaned with a chlorinated hydrocarbon, such as brake cleaner. When combined with ultraviolet radiation, chlorinated hydrocarbons can form phosgene gas, which can cause serious injury or death.

Precautionary measures

What can happen:

• If a worker gets burned, immediately pour cold water over the burn.
• Make sure that there are no materials such as flammable liquids, paper, etc. in the welding area.

Important! Before turning on the device, you must make sure that there are no puddles of water on the floor around the table or device.

The weld metal will remain hot for several minutes after it is welded. In most cases, the heat is localized close to the weld itself.

Gloves must be worn when welding and handling newly welded material. White cotton gloves can be used for light welding. For heavier welding, protective deerskin or heavy-duty gloves should be used.

Manufacturers are constantly researching and developing welding systems to improve equipment performance, increase productivity and make it easier to use. If you have questions about the potential benefits of systems or for help selecting the right system for a specific application, you can always consult a trusted welding equipment distributor or manufacturer.

Source: https://rusenergetics.ru/instrumenty/kak-polzovatsya-svarochnym-apparatom

How to use a welding machine for a beginner -

If you have your own welding machine, then sooner or later you will have to use it. Fear before using welding for the first time is common, so don’t be too nervous or afraid to weld metal.

As soon as you get the basic skills of welding with a machine. you will definitely like this process and you will start cooking everything. But before that.

How to start welding, you need to fulfill some initial requirements and strictly follow safety precautions and rules for using the device.

Preparing to use the welding machine

using a welding machine

Before you start welding, you should clearly understand some points:

You have fully familiarized yourself with the safety precautions and fulfilled all its requirements. You have removed ABSOLUTELY all flammable and even combustible materials and containers from the welding site. You are performing the work in a well-ventilated area or in the open air. The main thing is that the front and rear parts of the welding unit are well blown with air. because it gets very hot.

You have taken care and prepared primary fire extinguishing means.

If all requirements are fully met, then you can start welding with a welding machine.

How to use a manual arc welding machine (how to weld with stick electrodes)

inverter welding

Welding work is carried out everywhere. They are very common not only at construction sites, but also in the work of auto mechanics, gas workers, plumbers and many other specialists. To carry out welding work correctly, you need to have special skills that can only be obtained with welding experience. The quality of the resulting parts, their durability and reliability directly depends on how well you cope with welding work.

There is now literature that explains well how to use welding machines correctly. Also, each unit comes with detailed instructions with illustrations and tables, from which it becomes clear how to carry out welding work correctly. When mastering the basic rules of welding work, you need to clearly understand their algorithm and clearly know safety precautions.

welding mask

The main points to consider are the availability of special clothing that will protect you from metal splashes. It is also necessary to have a protective mask and gloves. The mask must be especially reliable, because...

It is precisely this that protects your eyes from the enormous radiation of the electric arc, which is several times greater than the radiance of the sun.

the jacket and trousers must be made of dense and poorly flammable material, otherwise hot scale may get on your skin and burn it to the meat.

Now you can directly consider the algorithm for carrying out all welding work

ground clamp

ground clamp

First you need to install and secure the ground clamp. It must be attached directly to the part to be welded, or so that current can flow through it (for example, on a screwed bolt).

Now you need to accurately select the desired electric current mode, which is necessary for welding with the existing electrode. It depends mainly on the diameter of the electrode, and the correspondence table is usually located on the welding unit itself.

Now we begin the welding process itself. First, we run an electrode across our metal workpiece. In this case, the touches should be short, and if you did everything correctly, then each touch should lead to a flash of sparks.

Now we bring the electrode to our part and perform a similar operation, only now we need to try to move the electrode 3-5 mm away from the metal surface. This is quite enough to create an electric arc between the part and the electrode, which will begin to melt it, welding parts of the part.

The most important thing in the welding process is to constantly hold the electric arc, not letting it go out and not touching the part, closing the circuit. You should always try to keep the same gap between the electrode and the part, which will allow you to make an even seam from the molten metal of the part and the electrode.

Practice more by welding unnecessary metal parts, and then you will start to get a great weld. do not chase speed, because the main thing in the welding process is the quality of work.

How to use a semi-automatic welding machine (using semi-automatic welding)

semi-automatic welding

1. We attach the grounding terminal to the part.
2. We adjust the wire feed speed depending on the thickness and type of metal being welded, as well as the thickness of the wire itself.
3. Turn on the power to the semi-automatic welding machine.
4. We cut off the excess wire so that a piece of 3-4 cm remains from the edge of the holder.
5. We put on a protective mask and gloves. We also make sure that there are no flammable materials in the vicinity.
6. Now you just need to press the trigger and wait for the arc to appear. You can calmly move the holder without letting the arc disappear.

Source: https://comfort-da.ru/kak-polzovatsya-svarochnym-apparatom-novichku/

How to connect the welding machine to the network?

Reading time: ≈5 minutes

So, you have purchased your first inverter welding machine. You will probably find an instruction manual included with it. Having carefully studied it, you will find that only a few general phrases are said about the correct inclusion. Is it really that simple? Plug the plug into the outlet and that's it? Alas, no.

An inverter-type welding machine is a complex device with its own nuances and features. By thoughtlessly plugging it into a household outlet, you risk losing the device itself or the wiring in the house. So how to connect a welding inverter correctly?

In this article we will briefly describe how to connect a welding machine to a 220 Volt home network and what should be taken into account.

Connecting a welding inverter

:

Each welding machine is equipped with a standard set of cables. Without them it is simply impossible to carry out any work. Therefore, the correct connection of the welding inverter is of great importance.

All such devices are equipped not only with two working cables, but also with another one through which power is supplied. Some difficulties may arise with the cables for connecting the electrode and the clamp that provides connection to ground. There are separate connectors with plus and minus for them.

Connection options may vary depending on the material used and the work conditions.

Preparation for work and connection

Once protective clothing, shoes, a welding mask and electrodes have been prepared, you can proceed to connecting the device. Due to the increased power of the equipment, it is necessary to become familiar with the characteristics and capabilities of the network used as a power source. As a rule, there are no special problems, since all household inverters are designed for 220 volts.

The only requirement related to safety is the installation of a machine with the necessary parameters. This will avoid negative consequences in the event of short circuits and other unforeseen situations.

Next, the welding inverter is placed at the workplace in compliance with certain rules and technical standards:

• The minimum distance from walls and large objects is 2 meters.
• Protective grounding is mandatory.
• There should be no flammable or explosive objects or substances nearby.
• For welding work, you should use a metal table or just a free platform.

Having prepared the workplace, you can connect the welding inverter. Each cable and wire is inserted into the desired inverter socket. An electrode is fixed in the holder, and a ground clamp is connected to the metal workpiece. Not only a household network of 220 V can be used as a current source, but also an industrial network of 380 V. In the absence of stationary networks, the use of a gasoline or diesel generator is allowed.

Electrical connection

When connecting a welding inverter to a home network, technical problems often arise. Therefore, this procedure must be performed correctly and extremely carefully, taking into account the peculiarities of local electrical wiring. The possible uninterrupted operation of the device should also be taken into account, with precise time intervals allocated for welding and technical breaks.

First of all, it is necessary to study the characteristics and type of outlet where the inverter is connected. Typically, when operating at maximum current, the inverter is capable of outputting 140 A. With such indicators, a 16 A socket is quite sufficient. Older houses still have 10-amp products and associated wiring, which may not withstand increased loads. You should check the presence and condition of safety plugs and automatic devices.

If so-called bugs are installed as protection, then as the load increases, their presence can cause serious consequences - short circuit, melted wiring, fire, etc. It may be necessary to install a new circuit breaker, taking into account the load that the converter adds.

In some cases, a so-called network sag may occur, when the voltage drops to 150 V or lower. This is the first sign of insufficient cross-section of network wires. If the voltage drops below the minimum permissible limit, then welding equipment cannot be connected to such a network.

When using an extension cord, the coiled wire must be unwinded to its full length. Otherwise, inductive resistance may occur in places where the twists are twisted, which, in turn, will lead to overheating of the insulation, even to the point of melting.

If winding cannot be avoided, it should not be too tight to ensure natural ventilation.

Power supply for inverter welding from a generator

If the facility is not equipped with a stationary electrical network, but welding is still required, you can use a gasoline or diesel generator. The most important thing is to correctly calculate the load so that both devices are optimally combined with each other.

It must be taken into account that any inverter contains coils, capacitors, electronic circuits and other elements that are considered reactive consumers with a power factor of about 0.7. When calculating the total power of the device, it is necessary to divide the active power by the power factor.

After preliminary calculations, hardware compatibility will look like this:

• With a welding current of 160 A, you can only work with electrodes with a largest diameter of 4 mm. The active power of such an inverter is 3.8 kW, and the total, taking into account the coefficient of 0.7, will be approximately 5-5.5 kW. Taking into account the 20% power reserve, a generator of at least 6 kW will be required.
• Welding current of 180 A allows work with 5 mm electrodes. Active and apparent power will be 4.8 and 7.5 kW, respectively. Therefore, the generator power should be no lower than 8-8.5 kW.
• If the welding current reaches 200 A, then such equipment needs a three-phase network. The diameter of the electrode increases to 6 mm. The total power of the inverter will be 11.5 kW, and the power of the three-phase generator will be no less than 15 kW.

Sometimes the question arises about the possibility of using a powerful welding device not to its full potential. Can a circuit for connecting an inverter to a generator with a lower power be used? Experts do not recommend making such a decision on your own; only a professional electromechanic can give a final conclusion.

It is also necessary to take into account the presence of additional options in specific equipment that require a short-term increase in power at the time of their use.

Selecting extension cord parameters

Often the power cable included with the inverter is too short and does not provide a welding connection so that it is located near the structures being connected. Therefore, welders are forced to use extension cables or carriers. They differ from similar household devices only in the increased power of the conductors.

From a technical point of view, an extension cord is nothing more than an additional section of the circuit from the inverter apparatus to the current source. Therefore, the well-known Ohm's law is quite suitable for calculations. With the same power of different connected consumers, the cross-section of the conductor directly depends on the length of the portable cable. The material should be metals with minimal resistivity.

Therefore, all modern conductors are made of copper. The insulation does not affect the electrical properties of the cable in any way, but during operation it is subjected to various mechanical loads. Its thickness should be as high as possible, in this case the cable will last much longer.

The choice of cross-section is made depending on the value of the welding current. The cable length and voltage are taken as the initial data for calculations. You should take into account the possible voltage drop in this area, which can cause overloads in the home network. It is mandatory to create a power reserve of at least 10%, eliminating the possibility of overheating of the conductors.

It is recommended to create extension cords of different lengths, divisible by 10 m, in the kit for the welding machine. It is better not to use short carrying cables. With optimal carrying sizes, it does not have a noticeable effect on the general condition of the circuit and the magnitude of its voltage. The cross-section of the cable used in the extension cord and the cross-section of the home wiring should be approximately the same. The use of household carriers to connect welding equipment is strictly prohibited.

How to connect an inverter in different polarity modes

Power cables have special terminals, designated plus and minus. Many novice users do not think about how to connect a welding inverter and connect the wires without taking into account the polarity and actual operating conditions.

Meanwhile, the difference is still present and it depends on the laws of physics, in accordance with which the movement of electrons occurs.

Having a negative charge, they move from minus to plus under any conditions, including when an inverter is included in this chain. The welding machine will work regardless of the terminal to which the electrode is connected.

However, the movement of electrons in each case will occur in different directions, and this will directly affect the workflow itself and the final result.

The direct polarity scheme involves connecting the plus to the workpiece (ground), and the minus to the electrode. An arc is formed between them, through which the welding current passes. With this connection, the anode is the part, and the cathode is the electrode. The weld seam will heat up more, about 700-1000 degrees more than the electrode.

With reverse polarity, on the contrary, the electrodes are connected to the positive terminal, and the part being welded is connected to the negative terminal. In this case, the electrode will heat up more.

The main factor in choosing polarity is the thickness of the workpieces being joined. A more massive metal requires stronger heating at the junction for better mutual penetration of molten particles. Thin materials, on the contrary, cannot be heated too much to avoid burn-through and an uneven weld.

Source: https://electric-220.ru/news/podkljuchenie_svarochnogo_invertora/2019-06-09-1700

How to set up a welding machine for electrode welding?

In everyday life, the need to weld objects periodically arises. Very often such a need arises in the private sector. For a large number of jobs, you can turn to experienced welders, but for small jobs it is better to use an inverter welding machine.

This is the simplest, most affordable and convenient type of welding. It is available for everyone to work with. To do this, you need to know the principles of the welding process.

Welding with an inverter has become a breakthrough in the field of welding machines, since outdated transformers are quite heavy and difficult to use. The advantage is that with inverter welding, spatter occurs less than when welding from a transformer.

An inverter is a welding machine that allows you to connect sheets of metal using an electric discharge. It has a distinctive feature: it has low weight and maximum capabilities , thanks to which it can perform work previously carried out by heavy and complex devices. The weight of the device depends on its power (from 3 to 7 kg).

You can transport it using a handle or strap. Cooling is provided by ventilation holes in the case. This device consumes electricity, which is directed only to the operation of the arc , and it carries out the welding process itself.

The device is insensitive to voltage changes. If there are constant fluctuations, you should pay attention to the required voltage, which is indicated in the inverter’s passport.

Handles and control indicators are located on the surface of the device :

• turns on and off with a toggle switch;
• the voltage and current values ​​are set using knobs on the front panel;
• the panel has indicators informing about power supply and device overheating;
• The outputs (“+” and “-“) are located on the front of the panel.

Additionally, the set contains 2 cables . One of them ends with a holder for the electrode, and the second has a clip in the form of a clothespin for securing the product. The device is connected via a connector located on the rear panel of the device.

Principle of operation

An inverter is an electronic device that runs on electricity. When old welding machines are turned on, a strong and huge jolt of electricity occurs, which may result in a power outage.

The inverter has storage capacitors that store electricity and ensure uninterrupted operation of the network. They gently ignite the arc of the inverter.

It is worth paying attention to the fact that electricity consumption depends on the diameter of the electrodes. The larger it is, the greater the consumption. In this regard, in order not to burn household appliances, before working with the inverter, it is necessary to calculate the maximum possible amount of electricity that will be consumed by the device.

It is worth considering that for each electrode diameter the minimum current strength , i.e. if you try to reduce the current strength, the weld will not work. If the current increases, it will work, but the electrode will quickly burn out.

The arc comes from the connection between the metal portion of the electrode and the metal being welded. The electrode and metal begin to melt under the influence of arc temperature . The molten parts in its place form a bath. The electrode coating melts, part of which goes into a gaseous state and blocks the bath from oxygen. The other part of the coating (in a liquid state) protects the metal from air during welding and during the cooling process.

After welding and cooling of the metal, the liquid part is slag, covering the seam from the outside. After cooling, the slag is removed by tapping with a hammer.

The electrode melts during the welding process. To prevent the arc from going out, you need to maintain its length , i.e., the distance between the metal and the electrode. This can be done by inserting the electrode into the welding site at the same speed and exactly along the seam joint.

With a short arc (about 1 mm), the metal is heated over a small area, and the weld comes out convex. At the point where the seam and metal meet, a defect such as an undercut (a parallel dimple near the seam) may appear. It reduces the strength of the seam.

A long arc is unstable, poorly protected from air, almost does not heat the metal, and the weld is not fully deep. The normal arc size is from 2 to 3 mm . A constant gap of this size will form a normal seam with good penetration.

How to properly weld metal with an inverter

To work with welding, the following protective elements are required:

• Gloves are made of rough material, but in no case are rubber.
• Welding helmet with a filter, which is selected depending on the value of the welding current. It is more convenient to use a “chameleon” mask, since the filter installed in it recognizes the arc and is darkened to suit its size. It is worth noting that at low temperatures the filter does not have time to work in time, and at temperatures below -100 degrees this mask will not protect.
• Clothing, which should be made of natural dense and non-flammable material, cover the neck and arms.
• Closed shoes made of genuine leather and thick soles.

It is necessary to prepare a safe place for welding :

1. Free space, absence of everything unnecessary.
2. Good lighting.
3. The work is performed standing on a wooden floor, which protects against electric shock.

After this, you need to adjust the welding current (depending on the thickness of the metal and parts) and select an electrode (2-5 mm). Usually the strength of this current is indicated on the device body. Electrodes must be selected based on the brand of welding materials. Next, connect the ground terminal to the surface to be welded.

, the metal should be prepared before starting work . Use a metal brush to remove rust from the edges, which need to be treated with a solvent (gasoline, white spirit). It is important to prevent the presence of grease and paint materials on the edges.

For beginners, it is better to make a seam in the form of a roller on a metal sheet with a large thickness. The sheet must be placed horizontally on the table. A straight line is drawn on it with chalk as a guide in the work, along which the roller will be laid. To start welding, you need to ignite the arc. You can do this in 2 ways:

• chirping;
• tapping.

You can strike and hold the arc in both ways. Next comes the welding process itself, which produces a weld seam. Metal deposits on top of the seam must be removed by tapping with a small hammer or hard object. The ability to control the length of the arc will provide excellent results.

The beauty of the seam is influenced by:

• electrode inclination angle;
• diagram of transverse and longitudinal movements;
• speed of electrode movement.

Welding such seams (slanted and ceiling) is a rather complex process. This is due to the fact that even molten metal is subject to the law of gravity. He is constantly pulled down, which causes difficulties. Beginning welders will need to spend a lot of time learning how to do this.

There are 3 technologies for vertical seam welding:

1. Triangle. Used when connecting parts with a thickness of no more than 2 mm. Welding occurs from bottom to top. The liquid metal is on top of the solidifying one. It flows down, thereby covering the suture roller. The flowing slag does not interfere, since it moves along the solidified bath, which exits at a certain angle. Externally, the weld pool looks like a triangle. In this method, it is important to move the electrode accurately to completely fill the joint.
2. Herringbone. This type of welding is suitable for gaps between workpieces equal to 2-3 mm. Along the edge from the depth towards you, you need to use an electrode to melt the metal to the entire thickness of the workpiece and, without stopping, lower the electrode to the gap. After melting occurs, do all this along the other edge. You need to continue from the bottom to the top of the weld. This results in a uniform arrangement of molten metal in the gap space. It is important to prevent the formation of undercut edges and metal leaks.
3. Ladder. This method is used when there is a large gap between the workpieces being joined and little dulling of the edges (or its absence at all). Welding is carried out in a zigzag manner from one edge to the other from bottom to top. The electrode stops at the edges for a long time, and the transition is made quickly. The roller will have a small cross-section.

Welding polarity

Melting of the metal during the welding process is carried out under the influence of the heat of the arc. It forms between the metal and the electrode when they are connected to opposite terminals of the welding device.

There are 2 options for performing welding work: direct and reverse polarity .

• In the first case, the electrode is connected to the minus, and the metal to the plus. There is a reduced introduction of heat into the metal. The melting point is narrow and deep.
• In the second case, the electrode is connected to the positive, and the metal to the negative, resulting in a reduced heat input into the product. The melting point is wide, but not deep.

When choosing welding, it is necessary to take into account that the network element connected to the plus heats up more. Thick metal is welded with direct polarity, and thin metal with reverse polarity.

Tips for dummies

• do not neglect protective equipment;
• Before performing work, it is worth practicing to prevent mistakes;
• welding must be performed with the minimum recommended amperage;
• do not forget to beat off the slag;
• to reduce the deformation of the product, you need to secure the parts during the welding process;
• follow instructions and recommendations.

In addition to the fact that welding can be used to connect parts, it can also be used to cut them . To do this, you need to increase the current and cut off the part or corners. It’s just not possible to do it exactly.

By using this guide, you can gradually improve your skills and use inverter welding without any problems in the future. The main thing in this matter is practice.

Source: https://rem-serv.com/kak-nastroit-svarochnyy-apparat-dlya-svarki-elektrodom/