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RepairLab14
Russia
Registrace 27. 06. 2022
Hello everyone!
My name is Nick.
I'm a trained engineer in electronics and automation, and a sole proprietor.
In 2015 I opened a welding equipment repair shop where I worked from then until now.
In the modern world a lot of breaking things can't be repaired officially.
I can't agree with this practice.
In my videos I show process of real commercial repair at the component level.
From my point of view, a broken device is not waste, but the creative task for an engineer. If successful, the device gets a second life, the owner of the device saves money, and the master earns and reduces garbage on the Earth
My name is Nick.
I'm a trained engineer in electronics and automation, and a sole proprietor.
In 2015 I opened a welding equipment repair shop where I worked from then until now.
In the modern world a lot of breaking things can't be repaired officially.
I can't agree with this practice.
In my videos I show process of real commercial repair at the component level.
From my point of view, a broken device is not waste, but the creative task for an engineer. If successful, the device gets a second life, the owner of the device saves money, and the master earns and reduces garbage on the Earth
Disgusting squeak
Do you hear a disgusting squeak from the welding machine? I have a solution!
zhlédnutí: 750
Video
Repair of a Lincoln Electric POWERTEC i320
zhlédnutí 1,9KPřed rokem
Lincoln Electric POWERTEC i320 device for MIG / MAG and MMA welding.
PWM signal problem
zhlédnutí 2,1KPřed 2 lety
120 Amp MIG/MAG welding machine with unusual fault: current does not turn off when wire feed is off
The easiest repair
zhlédnutí 2,4KPřed 2 lety
Short-circuited power diode as one of the reasons why the welding machine does not work
Repair of an old welding inverter
zhlédnutí 1,5KPřed 2 lety
Repair of an old, rusty welding inverter. It was manufactured around 2006 year.
A manufacturing defect killed the new welding machine!
zhlédnutí 4,3KPřed 2 lety
In this video, I will show you how a minor manufacturing defect can create a big problem.
Cheapest repair ever!
zhlédnutí 4,6KPřed 2 lety
How expensive can a repair cost? Of course, intellectual costs are difficult to calculate. How much can spare parts cost to make broken equipment work again? In this video I show the repair of the welding machine, the output of which is constantly 12 volts.
No output. Repair of a welding machine
zhlédnutí 72KPřed 2 lety
Repair of an extremely low cost inverter. No output voltage.
Ultra fast repair. Welding machine with exploded transistors.
zhlédnutí 4KPřed 2 lety
In this video I'll show you the repair process of a welding machine with exploded IGBTs at 6x times speed Four hours of the real repair process were compressed into 10 minutes video.
Welding machine repair after a fire inside
zhlédnutí 4,3KPřed 2 lety
In this video I will show the process of repairing a welding machine that had a fire inside. Two hours of the real repair process were compressed into 10 minutes video.
Thank❤❤
BRO Q1,Q2,Q3,Q4 TRANSISTER VALUE?
Здравствуйте. Этот канал для англоязычных)
In case you are wondering what is VRD, let me help you. VRD simply means Voltage Reduction Device. This is a safety mechanism that is put in place in a welding machine to prevent accidental electrocution when the machine is not actively welding. When the welding machine is turned on but not actively welding, the VRD automatically lowers the Open Circuit Voltage also simply referred to as OCV, to a safe level, typically around 15V or less. As soon as the welder starts welding and forms a closed electrical circuit, the VRD deactivates, allowing the OCV to rise to its maximum level to establish a stable arc. VRD is especially important when welding in damp, humid, or confined spaces where the risk of electric shock is higher.
Very nice video
How many voltage out this plant
Киргуду? Их бин херр… извините за мой немецгий :)
Нехер его трогать. На скорость не влияет. И на ток. И на надежность too.
Hello bro,i changed all 8050 ,zener,6.2k ,22k resistor but i am getting 0.8v at 8pin of 3525 what could be yhe Resason,should I remove IC because that only left to change now
Sir hindi main batayen please
Buenas tardes “ Señores muy buenos sus videos; solo le falta es grabarlos con audio ; ya q es fundamental el audio para interpretar mejor el video; muchas gracias
thanks
Ye transitor nihi ha yo kya karen
Am un bester 190c am eroare f01ce poate fi
i love that
I have mesin welding .no out put how to refair
I have a Lincoln Electric LE31MP that blew up, and I'm trying to repair it. The low power supply UC3842/MOSFET/resistor blown-shorted. Replaced all these, and relay turns on and fans work, but still nothing else works. IGBTs/diodes are OK. There is also a UC3843 and MOSFET next to the low power supply. That MOSFET seems OK. Any recommendation, what to check?
Hi RepairLab14, do you have the diagram for this welder? thanks in advance
Hello Brother. I experienced a problem with my inverter welding machine, my machine uses a 2s forward system, after I analyzed the IGBT and soft start the resistor burned out, and after I checked the signal entering the GDT transformer, the square wave was only 17% and resulted in an over current/overheat indicator lights up when the welding wire is attached, for problems like this which part must be analyzed. Thank You.
I have a miller 161 sth machine that has no weld output, can it be fixed?
Regarding the 4 places, I think it is for either 2 IGBT or using 4 mosfets selection choices.
May God continue blessing you with your knowledge, sir what is the issue for inverter welding machine 300a, know output voltage, and the right is ok, and I have change the card, same issue know output voltage.
Boss what is problem for inverter welding machine 200a,250a,300a, after I change the four igbt, and I check the output voltage is 90vdc, when I test the sparking, immediately the igbt will explode back, sir what is the cause sir?
there Nice equipment fast & quick repair........
عمل جيد. شكرا على الفيديو.
I recently got a Kzubr 400N MMA single phase stick welder which claims to (input 220v-36.6A stable, up to 47.6A max input)output 400A lol. Anyway it seems to be built solid and after further inspection I found that the real output is actually 200A which is still awesome considering I paid 120€ for it. Anyhow I have taken it apart and examined it and the insides look pretty identical but instead of the ground and stinger bars that are made of aluminium in the one shown in the video mine has them made of copper which was nice to see. Anyhow what do you think the life expectancy will be of my machine?
Depends on your luck. )))
I have looked at data sheets and diqgrams and no info on correct voltage at shutdown/soft start pin. Thanks for sharing the info. 👍
Vref 5V
What’s your address?
61°15'07.9"N 73°20'41.1"E ;)
Hello I have the same problem on my mma 250 igbt welder. Pin 8 was reading low and I've removed j3y smd transistor and now it works. Should I wait for replacement transistor arrives or can I work with welder? Thank you
I got the problem it sparks but too weak
Sg3525 ur ic?
Maybe operational amplifier LM358
I have the same welder and I have 67 volts at the output but it has no current. The output diodes and triacs are fine, the sg3525 works correctly. I don't know where to look anymore
Maybe operational amplifier LM358
Buenas noches desde Colombia, hasta ahora encuentro su canal y es muy interesante su trabajo, tambièn me dedico a las reparaciones de estas màquinas y todo el tiempo se aprende, estoy recopilando informaciòn valiosa como èsta, muchas gracias por compartir su experiencia.
Gracias, no tenìa voltaje de referencia del pin 8 del SG3525, para futuras reparaciones
I enjoy watching your great electrical skills.Did you ever see inverter a “Mustang 320A “?It is seeling in Serbia,Hungary,Croatia and surround countries.Think to buy it. My question is whats max current of that device ?This “320” is sa trick and stupidity cause none monophase welding maschine cant produce more than 200A.Спасиба, Милош
A 250 amp inverter draws up to 45 amps on input. I have not seen devices for 320, powered by one phase.
Great video ,like the others 😊This current metter,is it amper clamp ?
Via current shunt
Bonjour
Great job, thanks for the example.
I have a welder machine which there is not output voltage. I tested 2 IGBT = Ok, 4 Diodes = Ok, 3 Polyester caps ok, 2 with 4.7 uF and 0.02 Esr and other 400v with 4.7uF and 0.03 Esr. Bridge rectifier is Ok. But, i haven't square waves in gate of 2 igbts. Thre wave it's similar to a part of senoid. Is the module the problem ?
@@lucasrocha4329 A short circuit on the 24V line and the power supply does not start due to overload, or the IC is powered off from the secondary circuit
Great work
sir VRD work what ??
VRD simply means Voltage Reduction Device. This is a safety mechanism that is put in place in a welding machine to prevent accidental electrocution when the machine is not actively welding. When the welding machine is turned on but not actively welding, the VRD automatically lowers the Open Circuit Voltage also simply referred to as OCV, to a safe level, typically around 15V or less. As soon as the welder starts welding and forms a closed electrical circuit, the VRD deactivates, allowing the OCV to rise to its maximum level to establish a stable arc. VRD is especially important when welding in damp, humid, or confined spaces where the risk of electric shock is higher.
superb teacher amazing
Thank you so much for sharing your knowledge
Your all video's amazing
Thank you so much 😀
👍
Sir with respect if you have diagram of any welding inverter pl send me thanks sir
Russian акцент. )))(
Can we weld or patch thin ms sheets with this machine
Yes, machine like this mostly used in car service
Thank you so much. Want to weld corroded ice cans of 16 gauge ms. Using baking soda and super glue temporarily.
Subbed. Good welding machine repair videos are what I've been looking for quite a while. Please continue uploading more videos. I'll keep watching, liking and commenting. Cheers
Thank you! )