Kemppi Master 202 - technical specifications

Nowadays, using a welding machine in everyday life has become quite common. Previously, welding even for the simplest household purposes was the work of professionals. Now the level of development of welding machine technology is high enough that all work can be done at home. Special education to master the art of welding is also not necessary, since to successfully perform simple welds, it is enough to familiarize yourself with a small amount of information and master some practical welding skills.

One of the best solutions for household welding would be to purchase an inverter-type welding machine Foxweld Master 202. We will show and explain below how to use it correctly and what the welder itself is like.

Kemppi Master 202

The Kemppi Master 202 welding machine is one of the most popular inverters from the Kemppi brand. At the moment, this model has been discontinued, but it can still be found in stores and can be easily found on online bulletin boards with used equipment.

The Kemppi 202 welding inverter from the Master line is equipped with all the necessary functionality for amateur and semi-professional welding. The device is comfortable and easy to use thanks to the “hot start” function, which simplifies ignition of the arc. Automation and stabilization of the welding arc is possible. The device produces up to 200 Amps of welding current, and allows you to weld with minimal metal spattering.

Kempi Master 202 is assembled in accordance with strict European quality standards and boasts an increased degree of safety. The “filling” is protected by a durable plastic case that is resistant to high temperatures, so that when heated it does not emit fumes that are dangerous to humans. All adjustments are simple and easy to use. And their size is convenient for a person with any size of hands; accidental changing of settings is simply excluded.

Kemppi Master 202 is positioned as a device for domestic use. Therefore, you should not use this inverter for professional welding; its power may simply not be enough. Although professionals in their field can weld metal even using a low-power inverter.

To sum it up, the Kemppi Master inverter model 202 is an excellent inverter for a summer resident or garage handyman. A used device will cost about 10 thousand rubles, which is extremely profitable considering all the advantages of this model.

Some argue that Kempy never had the Master 202 in stock, and that only counterfeits of the well-known brand are on sale. We cannot clearly confirm or deny this information. However, the Kempi Master welding machine copes well with the task, even if it is homemade in China.

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Popular inverter models

The Foxweld brand has a fairly large assortment, but we will highlight the most popular models from this manufacturer: welding inverter Foxweld Master 162, welding inverter Foxweld Master 202, welding inverter Foxweld Master 162, welding inverter Foxweld Master 202M, semi-automatic welding machine Foxweld Invermig 185.

Let's talk in more detail about the Foxweld Master 202 welding machine, since it is one of the most popular among the entire range of the Foxweld brand.

The Master 202 inverter from Foxweld is designed for manual arc welding and produces up to 200 Amps of welding current. The device is capable of working up to 60% of the welding cycle without interruption, which is not so much, but this is enough for a beginner.

This model is relatively compact and weighs about 8 kilograms. So you can transport it on public transport on the way to the dacha, which is extremely convenient. The Master 202 model is equipped with a hot start, anti-sticking and arc afterburner. These functions will simplify your work and help you master the basics of welding if you are a beginner.

The model turned out quite successful. It is inexpensive, and the manufacturer used quite good components when assembling it. The arc ignites without problems and burns stably. Let us only note that the power cable included in the kit cannot withstand negative temperatures and breaks when welding in the cold.

Kemppi Minarc 150

But the Kemppi Minarc 150 welding inverter is definitely a genuine model and is on sale. Even more: this model has been continuously produced for more than 5 years, as it is very popular among practicing craftsmen.

The device is designed for MMA and TIG welding, so it can become a universal assistant in the household. Many people note in their reviews the reliability of this device and its indestructibility. This is true. The device has a shockproof body that is resistant to scratches and falls. Also, Kemppi Minarc 150 is capable of operating at temperatures from -20 to +40 degrees Celsius.

The Minarc 150 model can weld with electrodes up to 3 mm in diameter. Some will say that this is a very modest figure. But we don't agree with this. The device does an excellent job, while many other inverters cannot cope even with 3 mm electrodes, although the characteristics indicate the ability to weld with rods up to 5 mm in diameter. Another feature of this model is the ability to weld at low voltage. You can cook at the dacha without losing quality and you don’t need to buy additional generators or stabilizers. Well, if you have no electricity at all on your site, then welding from a welding generator is possible.

The device is equipped with a hot start and arc afterburner, so even a beginner will have no trouble mastering welding skills. The weight of Minarc 150 does not exceed 5 kg, so you can transport it anywhere without any problems. Including on a crowded train on the way to the dacha.

BEWARE OF FAKES!

Information from the manufacturer Minelab

Dear treasure hunters, beware of gray Chinese counterfeit metal detectors under the Minelab brand sold on the Internet, in black markets, stalls and from unauthorized dealers!

Externally, it is very difficult to distinguish a Chinese counterfeit from a real device. But from the operation of such a metal detector, it is immediately clear that the device is gray, of poor quality and does not meet the stated parameters.

The only way to purchase a real Minelab product is to buy only in Minelab brand stores and from official dealers in Russia. Full list of stores in Russia

We warn you that Minelab is not responsible for counterfeit products manufactured under the Minelab brand!

HOW TO DISTINGUISH A BRANDED METAL DETECTOR FROM A GRAY DETECTOR:

1) Minelab products are protected by two square holographic stickers with rounded edges, 20x20 mm in size, located on the control unit. The hologram shows the Minelab logo and the serial number or old round holograms.

2) Before purchasing, check the serial numbers of the metal detector against the database of official Minelab devices. The number is indicated on the back of the device. Check number

2) Included are instructions in Russian in typographical form.

3) Minelab warranty card on a separate insert.

Information from the manufacturer Coiltek

Coiltek search coils are very popular among gold and treasure hunters around the world, and this has become the reason for the active counterfeiting of Coiltek products by small Chinese companies. Low-quality Chinese counterfeits are sold by black and gray dealers on dubious sites and online stores.

Coiltek encourages all current and potential customers to ensure that they are dealing with an authorized dealer or purchasing products from an authorized dealer's store!

Before purchasing, be sure to check whether the seller is an official Coiltek dealer, and if unsure, contact us or look at the list of dealers on the websites www.coiltekmanufacturing.com.au or the Russian www.minelab.com.ru to find the dealer closest to you .

HOW TO DISTINGUISH A BRANDED COILTEK FROM A FAKE:

Look at pictures of original Coiltek coils and counterfeits with descriptions of the differences and explanations. Remember that fakes are VERY similar in appearance to the original and may eventually become indistinguishable from it, so the best way to protect yourself is to make a purchase from one of the official dealers, a list of which is on the sites above.

Kemppi Minarc Evo 180

The Kemppi Minarc Evo 180 welding inverter is a more advanced model from the Minarc line. This Kemppi semi-automatic welding machine is still easy to use and does an excellent job. But at the same time it has better characteristics than its predecessor models. Minarc Evo 180 is designed for full MMA and TIG welding.

This model has proven itself well in professional welding on construction sites and when performing repairs. Minarc Evo 180 produces up to 180 Amps. Which may seem insufficient for complex welding work. But it is not so. The device is thought out to the smallest detail and effectively uses its potential. Allowing welding of complex metal structures with modest (seemingly) characteristics.

Kempi's Minarc Evo 180 works well with unstable voltage. And when using long welding cables, which is especially convenient. Consumes little energy due to built-in energy saving technology. So you don't have to worry about your electricity bills. The arc ignites without problems and burns stably when using electrodes of any type.

Advantages and disadvantages

The welding inverter FoxWeld Master 202 has the following advantages:

• Relatively light weight, since for a device with such parameters 9 kg is a completely acceptable value.
• Continuous operation at maximum parameters can be carried out 60% of the time. Considering that they are not always used, at lower currents the continuous operation time becomes longer.
• The ability to use electrodes up to 5 mm, which covers the entire range of intended work.
• Affordable price.
• Simplicity and reliability of design.
• The presence of several important functional additions.

As with many other devices, there are some disadvantages here, which are manifested in the following:

• The design does not provide a belt, which creates problematic moments during use.
• The cables included in the kit lose their elasticity at low temperatures.
• The standard holder does not meet high quality standards, so it has to be changed immediately, and the cable turns out to be too short.
• Has a high noise level.

Diagram of the welding machine FoXWeld Master 202

Signal shape on power transistors SAI FoXWeld Master 202

Everything is okay. Then we put everything back together as it was. There are 12 transistors, everything needs to be wiped clean of old dried paste, as well as the rubber gasket. Then apply new grease and put everything in place, the board should fit into the four guides there are plastic heels 4 pcs. Then we fasten all 12 transistors on one side with staples. And we check with a tester whether the central terminals of the transistors are touching the housing; sometimes the gasket breaks and the transistor touches the housing and can fail and pull the entire arm along with it. And you will also have to repair the inverter itself, which means extra problems, money and time.

Mounting power transistors on the radiator SAI FoXWeld Master 202

Repair of welding inverter FoXWeld Master 202 photo board

According to this scheme, there are many brands of welding machines: BRIMA and Sai 200 and Iskra , etc. I have encountered many defects in these models; most often one transistor breaks down and when the device is turned on, it immediately goes into protection. The same thing happens and a diode breaks through, it also goes into protection. But these devices are very reliable and have proven themselves very well in production.

Specifications

The Chinese-made Kempi product does not have specifications that have precise indications of power and performance. But certain functions of the Kempey welding machine are known that simplify the work process. Such options include the technical capabilities of the device:

Technical specifications Kemppo Master 202

• hot start;
• work stabilization;
• arc control in automatic mode;
• improved air cooling system;
• protection against electric shock.

The “hot start” function allows you to ignite the arc even at low current levels. In the presence of complicating conditions, the arc glows evenly and without overheating. Thanks to this functionality, the Kemppi Master 202 machine produces high-quality seams with a uniform structure and does not allow unnecessary splashing of metal.

Welding operations involve a risk to human life, and this equipment eliminates the possibility of electric shock. The body of the unit is made of durable plastic, which isolates the internal structure of the Kempi from the external part. The control handles and holders of the unit are secured in a special way, which reduces the risk of accidental impacts and jolts.

The welding installation is equipped with protection from dust and dirt - all internal power elements are located in a separate protected compartment. The device performs work at an average level. For its use, electrodes with a width of 2-3 mm are recommended.

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Common problems and their solutions

Here are examples of simple problems ; in more complex cases, it is better to immediately send the device to a repair service. For example, if the ready-to-work light stops lighting or mild electric shocks occur. If there is a burning smell from the inverter and, moreover, smoke appears from the device, the best solution would be to contact a specialist.

1. Often, when a circuit breaker is turned off, it is enough to simply change the plugs.
2. The arc does not light up, but the cooling fan is running and the welder's readiness indicator shows that everything is in order with the device. Most likely, the current is not set, look at the current adjustment, it is probably in the 0 A position.
3. The electrode began to “stick”; in most cases, the situation will be corrected either by increasing the current or by changing the welding angle from strictly vertical to an angle of 45 degrees to the part.
4. The yellow indicator lights up, indicating that the device is overheating - just stop working and wait until the device cools down and the yellow signal goes off. This will mean that the device is ready for use again.

Welding machine design

Features of the Kempi Master 202 welding machine:

• the device is turned on using a toggle switch, there is no possibility of fine-tuning the operating parameters;
• this model does not have additional sockets, which eliminates the connection of other devices or wiring;
• the unit body is made of high-quality materials, which ensures excellent strength;
• the welding machine is equipped with an excellent internal air cooling system, which prevents overheating;
• during operation, Master 202 makes virtually no noise, despite its bulky design;
• very short wires were used during welding, and their replacement is impossible due to close contact with the unit;
• It is recommended to use Kempi with welding wires with a diameter of no more than 3 mm. The device cannot cope with 5 mm electrodes.

Design features of the device

The model of this device is not new for Russian consumers, since it has been working in Russian conditions for quite a long time. Therefore, Chinese engineers had enough time to perfect the design of the unit and its functional parameters.

Foxweld uses high-quality components, the assembly is also done carefully - there are no backlashes or cracks on the device body, so the device looks very decent in appearance. The metal frame of the housing is bolted together, and screw connections are used to secure the power transistors.

The work process is accompanied by forced cooling of the devices to prevent overheating of the device and, thereby ensuring high performance in general. In case of overheating, the built-in protection system is activated, and the corresponding light indicator lights up on the device panel.

How does a Kempy welding unit work?

The welding machine, which is produced under the Kempi brand, cannot be called an inverter, although the manufacturers claim so. It is too heavy for this type of device. But it is well-built, which ensures its reliable operation over a long period of time.

Control panel Kempi Master 202

The functions of Master 202 are adjusted using a toggle switch. It allows you to set only two operating modes called “weak” and “powerful” (there are no digital values ​​in this case). On the right side of the end panel there is a switch, on the left there is an overheating indicator, additionally equipped with a plastic reflector.

The welding process using this device is carried out at an average level. When using 2 mm electrodes, the arc is kept stable. But when using a welding dart with a diameter of 3 mm, you have to constantly additionally heat the metal.

The lack of normal power regulation is clearly felt. Even if the toggle switch is at maximum, it is very difficult to work with dimensional profiles. In this case, there is an increased consumption of electrodes and constant sticking of the arc. Thanks to the effective cooling system, the Master 202 device practically does not heat up during operation. When operating the unit, there are almost no situations when the temperature control lamp is activated.

When working with Kempy welding, you feel the high quality of the clamp for the electrodes and the low quality of the alligator clip on the ground wire. It is made of not very high-quality metal, which during long-term use can lead to its destruction.

Related video: Master 202 - review

How to properly connect an inverter

Before you start using the device , you must check all included components for integrity. Using an external inspection, check the integrity of the power cables and the grounding cable. Make sure that the cables are securely connected to the device. Inspect the fan; there should be no blockages or unnecessary objects in it. If work takes place indoors, it is necessary to ensure a constant flow of fresh air.

After switching on, under no circumstances should you cover the device with any materials, especially those with a dense structure. There may be cases when, for some reason, the power wires fail, wear out, or disappear altogether. To make new ones, you will definitely need to select the cross-section of the conductive parts of the wire. If the length of the wires is less than 5 meters, the cross-section must be at least 16 squares. If you want to increase the length of the power wires, choose a cross-section of 25 squares.

Do not reverse the polarity of the rods before connecting (the polarity is indicated in the instructions for them). The grounding clamp is marked “minus”, and the electrical holder clamp is marked “plus”. The grounding clamp should be located as close as possible to the work site.

Be sure to check the mains voltage , whether it is coming to the inverter and what value it is. There is an indication on the welder panel, and the power indicator indicates the device is ready for operation.

After all the necessary checks, we switch the switch to arc welding mode (MMA toggle switch). Afterwards, you need to select the amount of current necessary and sufficient to carry out welding work under the given conditions and requirements.

Upon completion of welding work, be sure to turn off the device and remove the working rod from the clamps.

The master 202 welding machine is capable of operating in DC argon arc welding mode or so-called TIG welding. This requires special tungsten electrodes and a number of actions:

1. Attach the grounding wire to the part to be worked on.
2. Attach the cable from the burner to the negative contact.
3. Connect the hose to an argon cylinder through a reducer to regulate the gas supply pressure.

For different currents of work, it is necessary to select a certain diameter of tungsten rods. Moreover, the greater the current, the larger the cross-section of the rod should be. At currents from 10 to 200 A, the diameter of the rod should be 2 mm, 60-150 A - 1.6 mm, and up to 80 A - 1 mm.

The ignition of the arc occurs after the rod comes into contact with the part and is gradually withdrawn from the part. Next comes the actual welding. The work is stopped by increasing the distance between the torch and the workpiece, while the gas supply is turned off 5-6 seconds after welding is completed.

Principle of operation

Kemppi Master 202 - top view

The operating features of the Kempi Master 202 welding machine are not published by the manufacturer, so you have to study its operation in practice. The inventory operates from a conventional single-phase electrical network. The welding machine operates on the basic principle of converting alternating current into direct current.

The packaging of the Kempi installation indicates the maximum electrode size - No. 5. The reality is that when using electrodes of this configuration, problems arise with the welding surface - it needs to be preheated. When contacting massive profiles, malfunctions and disturbances in the functioning of the device are noted.

The optimal electrode is electrically conductive rod No. 2. An electrode of this configuration is recommended by the manufacturer for use in the Kempy Master 202 apparatus. The easy-to-use Kempy equipment ensures reliable welding of metal structures and small-sized parts. The stable welding current used during operation allows you to obtain a super-strong seam of excellent quality.

Electrodes for Kemppi Master 202 inverter

Schemes of other models

As previously noted, almost all inverters operate on a similar principle, and the created circuits may differ insignificantly. All welding machines are divided into several main groups:

1. To carry out electric arc welding when using electrodes coated with a special composition, MMA type equipment is used. This scheme is characterized by high efficiency, and the design is light in weight.
2. To use refractory electrodes, MMA+TIG welding equipment is used. They can operate in an environment of inert gases.
3. On production lines there are units with semi-automatic bar feeding. In this case, work is usually carried out in an environment of inert gases or in special baths.
4. For forging or other repairs, spot welding is used.

The ARC 160 model, the circuit of which is quite complex, can be used for a wide variety of work. Unlike the arc 140, the new model's circuit has no major drawbacks.

Welding inverter TORUS 250

The Torus 250 version consists of the following elements:

1. A clock type generator built on a TL microcircuit. It is worth considering that the powerful inverter circuit does not provide for the use of PWM, but the microcircuit has two comparators with thermal protection sensors.
2. The protection system and control module are made on the basis of LM. The sensor that determines the current parameters is placed on a ferrite ring with a winding.
3. The circuit also includes two output drivers built on IR

A separate category includes a welding inverter circuit using thyristors, which has become very widespread.

Repair of Torus 250 should be carried out by opening the structure and visually inspecting the main elements. In this case they are as follows:

1. The output type rectifier is represented by a separate board on which two radiators are placed. They serve as a base for placing diode assemblies. The module also includes one transformer and a choke. The number of elements in the output rectifier largely depends on the specific assembly.
2. The switch module is represented by four transistors in each of the four groups. In order to reduce the degree of heating, they are all placed on separate radiators, which are insulated with special gaskets.
3. A powerful diode bridge is used as the output rectifier. In the case under consideration, it is located at the bottom of the structure. This model is equipped with an extremely reliable and practical bridge, which is difficult to burn if the cooling system is working properly.
4. The control chip is the main design element. As a rule, the durability of the entire device depends on its correct operation. You can check the unit yourself only if you have a special oscilloscope and the appropriate skills to work with it.
5. Housing with cooling fan. As a rule, the cooling unit fails only in the event of mechanical impact.

To diagnose many elements, it is necessary to dismantle them. That is why it is best to entrust the work to professionals, since incorrect assembly can lead to significant problems.

The welding inverter SAI 200, the circuit of which differs insignificantly from devices of a similar type, is used for manual arc welding and surfacing when using stick electrodes. RDMMA 200 belongs to a new type of equipment that is created without the use of transformers. Due to this, more accurate and smooth adjustment of current indicators is possible, and there is no strong noise during operation.