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The trend of increasing popularity of affordable machines for inverter welding has been manifesting itself for 10 years. Main buyers: novice craftsmen, summer residents, welding students.
Craftsmen are willing to pay no more than $200 for their welding machine. The conclusion is that budget inverters have quickly and firmly become popular in the sales industry.
This is especially reflected in the reconciliations of stores concentrated on this target audience. Manufacturers promise us a fairly good level of performance for a budget inverter.
The Latvian brand “Resanta” is a leader in sales of inverters, which perform well in everyday life. The number of variations, reliable assembly, and availability of these devices do not leave welders indifferent.
This article focuses on the properties and capabilities of all models of this device for welding work.
- WELDING MACHINE RESANTA SAI-220 Model characteristics
WELDING MACHINE RESANTA SAI-220
Resanta SAI-220, or 220A, deservedly takes a leading position among machines for metalworking. Its price is the highest among budget inverters, which is compensated by its novelty and innovation.
If you have a lot of money for which you want to purchase a more professional, powerful welding device, the Latvian brand offers you the following mechanisms: SAI-250, SAI-250PROF.
Resanta SAI-220 copes with the problems that will arise in the everyday life of a skilled welder. When working, welding with coated stick electrodes is used.
Of course, craftsmen do not expect to get good results when using this device in large enterprises.
But when newbies are practicing their skills in this activity, as well as for small jobs that do not require special power, it will be a good bonus.
For professional purposes, for example, the LINCOLN ELECTRIC Invertec V350 PRO is used, which amazes with its characteristics and power. Its price is about $10,000, so it is unlikely to find use in everyday life.
Model characteristics
Let us dwell on the properties of RESANT SAI-220. 220 is the highest current declared by the manufacturer. As you can see, this characteristic is reflected in the name of this device.
To operate, you only need a regular outlet into which you plug your inverter, because the device requires 220V (can fluctuate within 20V).
The welding device itself is a fairly mobile device - it is light in weight and convenient to use. All this allows you to easily move it by attaching it to your shoulder with a belt.
Modifications of SAI-220
Welding machine Resanta SAI-220
Resanta SAI 220 (Resanta 220A) is the penultimate model in the line of budget SAI inverters. Only the SAI-250 and the SAI-250PROF modification are more expensive. The Resanta SAI 220 device is intended for domestic use and welding using coated piece electrodes.
This inverter should not be taken as a professional welding machine. It is intended for study or simple repairs. But not for work in production or in a large repair shop. For such purposes, expensive powerful inverters like the LINCOLN ELECTRIC Invertec V350 PRO costing $10 thousand are usually used.
Let's return to the characteristics. The maximum declared current is 220 Amperes. In general, the names of inverters in the AIS line contain this characteristic right in the name. Hence “SAI 220”, which means “220 Amperes”. The device only needs 220V (+/- 20V) to operate. Plug in the inverter and you can start welding.
SAI 220 is very compact and lightweight. It can be hung on the shoulder using a belt and carried without any problems. This is really important if you have a large estate or have to travel long distances.
Welding machine SAI-220PN
If you can call yourself a dacha enthusiast, Resanta SAI -220PN is something that may interest you.
You will certainly see the functionality when, while working outside the city, there is a power outage or a voltage drop (these are quite pressing problems for dacha cooperatives) - this inverter can easily cope with these troubles.
You will forget about what a voltage stabilizer is and will simply do the necessary work without worrying about the integrity of the device or your safety.
Your seams will be of good quality; all you need is a 220V socket and this welding device.
A device with an easy-to-use digital panel that remains readable even in bright sunlight. It’s not scary if your vision is less than 100%, because all the inscriptions are expressive and quite sharp.
With the help of general knowledge and intuition, you can figure out the device quickly enough. But don’t forget about the operating instructions - this is a reliable assistant at hand.
If you don’t know what to give your father or grandfather, this is what you were looking for. Get rid of these old bulky units from their summer cottages, move with the times, not forgetting about your loved ones.
Device and principle of operation
The device's circuit boards are housed in a metal case with holes for ventilation. Therefore, the ventilation system must not be closed during operation.
The front panel contains:
- Current regulator.
- Network and overheat indicators.
- Connectors for connecting cables.
On the back of the panel there is an on/off button.
Resanta SAI-220 converts alternating voltage, making it constant at 400 V, then the direct voltage becomes modulated and rectified. Pulse width modulation allows you to adjust the welding current.
If the overheat protection operates (a color signal appears on the back of the panel), the welder must stop work and check the cables for service.
Preparation for use:
- Make sure the Power switch on the rear panel is turned off.
- Connecting grounded cables and an electrical holder to the power connectors (- and +).
- Connecting the Resanta SAI-220 welding inverter to the electrical network.
- The welding current value should be set to minimum.
- The device is started using the “Network” toggle switch located on the rear panel.
- Adjustment of welding current level.
- After completing the work, reduce the current regulator again to the minimum values.
- Turn off the device using the switch.
- Disconnect the power supply and welding cables.
What is prohibited to do:
- Use the inverter in conditions of high humidity or strong wind.
- Use cutting tools that create metal dust in the immediate vicinity of the device.
- Work when the network or welding cables are faulty.
It should be stored in packaging, in dry rooms where there is no dust, fumes of acids and alkalis with a temperature range from -10 to +50 degrees with a humidity level of up to 80%.
Welding machine RESANTA SAI 220K
Looking for something even more compact than previous designs? In the Resanta SAI-220K inverter, the properties are as close as possible to the SAI-220 design, but the size and weight are minimalistic.
The weight of this version is no more than 5 kilograms, so transportation will not burden you even when transported in public transport.
If you are not only a welding master, but also a car enthusiast or traveler, of course, you should always have a welding machine at hand. This modification will not significantly affect the overall weight or size of your luggage.
Even the need to transport other components, such as cables, a mask, and so on, will no longer be a problem for you.
Resanta SAI 220 is my favorite device!
Welding inverter "Resanta SAI 220"
Recently, the leading position in sales among the entire line of inverters has been occupied by a welding inverter...
Resanta SAI 220. This is evidenced by numerous positive user reviews about the functionality of the device and build quality.
BUY WELDING MACHINE RESANTA SAI 220 NOW!
Resanta SAI 220 is a high-tech welding inverter for manual arc welding. This is one of the latest developments, which boasts the latest technological innovations that contribute to high-quality and convenient work.
Why is this inverter model so popular? Perhaps the main mystery of this model is that its parameters cannot be classified into the class of both household and professional units and the users of these devices are both professionals and beginners. So what is its appeal to such opposing categories of buyers?
The characteristics of the Resanta SAI 220 welding inverter in terms of maximum welding current are an order of magnitude higher than similar analogues from the Resanta line, which gives professional welders more scope for creativity in their work and allows them to perform serious welding work using thick electrodes and with more stable performance.
Beginners without experience in working with a welding inverter are attracted by the ease of operation, because the SAI 220 welding inverter can be used immediately, without prior preparation, just read the instructions. The design features of the inverter help maintain a stable arc and ensure comfortable operation.
The operating principle of Resanta SAI 220 is a two-stage voltage conversion (AC to DC and conversion to high-frequency AC). The welding inverter circuit consists of the following main components:
1. power unit with a frequency of 50Hz
2. inverter unit that converts direct current into high-frequency alternating current
3. rectifier
4. transformer
5. throttle
Resanta SAI 220 belongs to the increased protection class IP21 and ensures safe operation for both beginners and professionals. All internal components of the inverter are motionless; all current-carrying mechanisms are insulated with high-quality varnish - this indicates mechanical security and the impossibility of objects getting inside.
The main advantages of Resanta SAI 220:
- The device has compact dimensions and light weight, which makes it easy to transport the unit and use it for mobile welding.
- Current adjustment range from 10-220A. This allows you to carry out specific work with electrodes of any thickness, at low current with thin electrodes, and at 220A you can carry out work with thick electrodes and massive surfaces.
- The powerful design of Resanta SAI 220 is very resistant to mechanical damage and allows for harsh use.
- The no-load voltage is 28V and the arc voltage is 80V. Such low values make the inverter safe to use.
- The design features of the device allow it to be used in harsh climatic conditions, down to -20°C. You just need to control the heating and cooling mode.
- A smooth regulator of the welding current allows operation without experience or special skills.
- The presence of two cooling fans improves airflow and cooling inside the case.
- Resanta SAI 220 is very resistant to overheating. Even if the fans fail, shutdown occurs only after two 5mm electrodes are used up.
- Additional functions “hot start” and “anti-sticking” will help beginners or people without experience master the welding process and facilitate easy and simple operation for a professional.
- Resanta SAI 220 has a high efficiency of current conversion and a welding control function during voltage surges, which significantly saves energy costs.
- Resanta SAI 220 ensures high stability of welding process parameters in conditions of unstable power grids. This advantage is especially relevant for residents of remote settlements with constant power surges and for places without central power supply with the presence of autonomous power sources (generators)
Here are comments and personal experience of using Resanta SAI 220 from customers of the online store
Mikhail, Sverdlovsk region, beginner
When we finally got around to electrifying the country house, the question of landscaping the area arose naturally. And any repair and restoration work is impossible without a welding machine. It was necessary to install a fence with a gate, and the material was available, only welding was missing. But you must admit that hiring a professional welder is a costly business, especially since there were financial restrictions. So I decided to purchase a welding machine, but I obviously limited the budget for the purchase. Since I’m not a welder by profession and it’s unclear whether the device will be needed in the future or not, I didn’t want to throw away a lot of money on equipment that might be collecting dust in the garage. But there was a desire to purchase a high-quality and reliable unit at a low cost, which would serve its purpose without repair. Of course, like most people who want to purchase welding, my first choice fell on the old proven classic - a welding transformer. I was almost ready to buy, but was stopped by the understanding of the inconvenience of its transportation. I couldn’t decide how to carry this huge and heavy box with me whenever I wanted to work. And then one evening, while studying information about welding machines, I came across a huge number of positive reviews in the direction of welding inverters. I took a closer look at this miracle of technology and was surprised; small and lightweight inverters promised technical characteristics no worse than those of transformers. The output currents of household models ranged from 120-240A, and they had a child’s weight, compared to the classics! The decision was obvious, and the scales tipped towards the purchase of a welding inverter. Now it was necessary to study the presented brands, models and prices. At one of the forums, during a conversation with old-timers, I was advised a specific model of the SAI 220 inverter from Resanta. Moreover, almost all the reviews towards this model were positive. Welding aces emphasized time-tested circuitry, functionality and ergonomics. The sellers claimed that this was the best-selling model of the entire Resanta line. After much thought, I decided to buy this particular model and found the cheapest price tag in the Resanta-Ural online store. This is my first purchase of a welding machine, but I was still impressed. I couldn’t even imagine that a welder could be so compact and light and still produce an operating current of up to 220A. I was also struck by the low energy consumption, which is approximately comparable to the operation of two electric kettles. After some period of operation, I was able to evaluate the breadth of current regulation, from 10-220A, which made it possible to confidently work with different electrode diameters. After two years of using the inverter, I can no longer call myself a beginner in the field of welding and quite reasonably say that I made the right choice. For a cottage, garage or workshop, this model is the most relevant and in demand. For these purposes, you can, of course, choose a less powerful inverter, for example 160-180A, but I believe that it is better to have a power reserve, and the voltage in our networks is often not normal.
Victor, Krasnoyarsk , 5th category welder
I have been using the Resanta SAI 220 device for four years now, and it has proven itself only from the best side. When purchasing, I was worried that it would be problematic to work with stainless steel without adding argon. But my fears were in vain, I cook with a 3mm stainless electrode and everything is fine. The only drawback of the inverter is the short wires, but we can solve the problem by carrying it.
Roma, Irkutsk, professional
Although I am a seasoned professional in this matter, I am impressed by the purchase of Resant SAI 220. Previously, I carried out work mainly on a transformer, which has problems with cooling and takes a lot of time to cool down. This is not the case with an inverter and this is its main advantage. The cooling system is at the highest level. An anti-sticking system has also been invented; even an inexperienced beginner can use it.
Andrey, Yekaterinburg , newbie with no work experience
I have a very interesting first experience using this device. I have never mastered welding technology and have never tried to weld, much less have my own welder. One day I came to a friend who was using Resanta SAI 220. Using this machine, a fence and a stove for a bathhouse were welded, so he persuaded me to try it, convincing me that there was nothing complicated about it. He handed me two 3mm angles and showed me how to weld. Surprisingly, everything worked out the first time, although it was a little crooked, but the fact is that everything held up. A week later I already had my Resanta SAI 220 and successfully practiced welding awnings to doors. Subsequently, he repaired the stainless steel tank and fence. There are plans to make a stove for a bathhouse. In general, I’m happy with the purchase, and I’m slowly gaining experience.
You can purchase the Resanta SAI 220 welding inverter on the website of the Resanta-Ural online store or in a specialized equipment store in Yekaterinburg, at st. Novostroya 1A, office 105.
Pros and cons of purchasing
Resanta SAI-220, as well as all derivative models of this inverter, are a combination of price and quality.
Low performance and low power, which block the use of the device in the professional field, do not spoil the quality of seams or the ability to hone the skills of students and beginners in welding. Moreover, on the contrary, they make learning and work easier.
Nowadays the Latvians have a lot of competition from manufacturers from China, who position their inverters as more advanced for the same price. What should a welder choose for his work?
The Resanta brand has created a large service structure, a system of real guarantees for the functionality of devices. Of course this is important for such a dangerous industry. All these components will protect you when operating mechanical devices.
As for the inverters themselves, indeed, they do not differ in their work from Chinese ones. Same kit and specifications. Chinese devices, after all, will be a little more budget-friendly, although the purchase is made at your own peril and risk.
Still haven't found the answer? We think that service and warranty should be available, albeit at a slightly steep price. Safety and reliability are paramount.
Reviews and technical characteristics of Resanta SAI 220
Topic of publication: welding machine Resanta SAI 220 - consumer reviews and price of equipment for a home workshop.
Specifications
SAI (inverter welding machine) Resanta is used for connecting metal structures with direct current using a consumable electrode. The low weight of the device allows a person to weld metal products in hard-to-reach places.
Welding machine Resanta SAI 220 - technical characteristics:
Design and principle of operation
The device's circuit boards are built into a metal case with ventilation holes. During operation, it is prohibited to close the forced ventilation system.
On the front panel there is (Fig. below):
- current regulator (2);
- indicators - network (3) and overheating (4);
- negative and positive cable connection connectors (5, 6).
There is a “Network” switch on the back panel of the device.
Operating principle: Resanta converts alternating voltage into direct voltage 400 V and then the direct voltage is converted into modulated voltage and rectified. Pulse width modulation is used to adjust the welding current.
When the overheating protection is triggered (signaled by a lamp on the front panel), the welder checks the serviceability of the cables and stops working.
The inverter is equipped with the following functions:
- hot start (Hot Start) - quality of welding at the beginning of work;
- Anti Stick - the electrode does not stick.
Watch an interesting video about how the device works:
Resanta SAI 220: instructions for use
Preparation for work and instructions for using the device:
- Connect a grounding cable and an electrode holder to the power connectors (+ and -). Polarity is selected depending on the brand of electrodes.
- The "Network" switch on the rear panel must be turned off.
- Connect Resanta SAI 220 to the power supply.
- Set the welding current regulator to the minimum value.
- Turn on the device on the rear panel with the “Network” toggle switch.
- Set the welding current regulator to the desired value.
- After work, set the current regulator to the minimum value.
- Turn off the device with the switch.
- Disconnect the power cord and welding cables.
Recommended current values depending on the electrode diameter:
Prohibited:
- use the inverter in a damp building and during bad weather;
- use cutting tools (which create metal dust) near the device;
- perform welding with faulty welding cables and power cord.
Storage rules:
- store the device in a box at a temperature of –10°С +50°С, humidity no more than 80%;
- storage is carried out without acid, alkali and dust vapors.
Possible causes of problems and solutions:
Electrical diagram of the welding machine Resanta SAI 220:
How much does the welding machine Resanta 220 cost?
This is a question that worries buyers! The price for a Chinese-assembled product is reasonable. As of May 12, 2016, Russian online stores sell the device for 8,660 rubles. You can find and buy a product a little cheaper.
Welding Resanta 220 - reviews from welders
Nikita, the device has been used for a year and 4 months:
Sergey, Rostov-on-Don:
Valera, production welder:
Video:
PS The Resanta SAI 220 welding machine receives mixed reviews. There are negative and good impressions from using the inverter. The choice is yours!
Main characteristics of welding machines
Any welding machine, regardless of its design, has one important parameter - the on-duration (ON) in accordance with different values of the welding current. Manufacturers of welding machines use different measurement techniques. However, when working on a welding machine, no one operates it continuously and at full power, burning several electrodes in a row, and our managers will be able to help in choosing the most suitable option.
The next equally important characteristic of a welding machine is the range of current changes during welding operations. The value of this indicator is an indirect indicator of equipment power. The wider the range, the larger electrodes can be installed, and, accordingly, the longer the duration of switching on the welding machine will be in the case of using small electrodes at the same current strength.
No-load current is also an important parameter of a welding machine. Its indicators are in the range of 60–85 V, and the higher this value, the easier it is to ignite an electric arc.
Advantages of this brand
Like many models of modern welding machines, SAI-220 has a number of additional options that facilitate work and ensure high quality welds. Such options allow you to solve another important problem: the influence of employee skills on the quality of the formed connections is reduced.
The benefits that many welders know about include:
- Possibility of automatic shutdown when the system overheats (this feature is provided by a special temperature sensor).
- “Hot start” for quick ignition of the welding arc due to the supply of increased current.
- “Anti-sticking” allows you to automatically turn off the welding current exactly when the tips of the electrodes are welded to the surface of the elements.
- “Arc boost” to automatically increase the current at the moment when the arc shortens, which makes it possible to prevent sticking of the electrodes.
The device in question provides enhanced protection against overheating, which is ensured by the following components:
- Two fans speed up the cooling process.
- Electronic circuits are resistant to high temperatures.
- Thermal sensor that turns off equipment when overheated.
These advantages benefit both beginners and experienced craftsmen, preventing many malfunctions associated with overheating of electronics, also expanding functionality and increasing the range of applications.
In addition, the Resanta SAI-220 welding machine is highly mobile, weighs little, and has a convenient shoulder strap for carrying to the work site. The device has a durable body that is resistant to wear. This is a universal model with which you can connect elements from different types of steel, including stainless steel.
Disadvantages of the model
Despite the excellent characteristics of the devices, experts noted a significant percentage of defects among these products. According to the suppliers themselves, out of 10 units, 2-3 fail before the end of the warranty period.
In most cases, devices break down due to overheating. You can try to fix this problem yourself or contact a service center. And if electronic components fail, the cost of repairs can be comparable to the price of a new device.
Another significant flaw is that the actual parameters differ from those stated in the passport by approximately 15-20%. So, if the declared parameter of the installation current is 210 A, then in some cases its value is 180 A. The operating efficiency does not suffer from this, but all the advantages cannot be fully realized. Welding metals with a thickness of more than 10 mm can be difficult, because this inverter is not able to completely heat the materials, giving only surface melting even with the use of electrodes 5 mm thick.
