I’m a welding service technician in australia(very new to it 10months) this video was amazing. Very thorough and helpful to me. Thank you very much! This has helped me heaps as I don’t get much training at my job.
Very excellent video nothing like this on YT. You made it very simple and straightforward. With a lot of respect. Your videos should be archived because these are master level tutorials and study cases. Highly recommended. Thank you very much.
Sir pull up and pull down resistor deep me video banaye please . Sir aapKe video me root video hote hai jo hame knowledge ko high level par le ji jate hai.
hahahhahahhahhahhah the fourth hand was hidden as well. i am thankful for our deep observation, this was my subordinate learning the troubleshooting techniques
اخوك من مصر واحبك في الله على هذه المعلومات القيمه جدا وارجو المواصله في جميع صيانه ماكينات اللحام بانواعها المختلفه الارجون والكهرباء والسي توco2.migmag Thank you Muslim man for your information.. and I thinking to manufacture in future انشا الله to make our Arabia module welding machine
Always enjoy your teaching video and knowledge ,I have learnt alot myself from watching your great teaching as you explain things so well ,Many thanks to you.
Recien me estoy iniciando en la reparecion de estas maquinas de soldadura, y encuentro sus explicaciones muy acertadas y muy bien dirigidas, felicitaciones y muchas gracias por sus aportes
I received a single board. there was not any igbt. when i install 60T60 it doesn't do anything. when i install 60N60 its runs normally but igbt get hot within few seconds even bulb in series and without any load. do you have any idea what could be the season ? Thanks
Wooh this is the best esplaination have ever gotten thanks man nice one and a big thumb up for you Pls am trying to fix one inverter welding machine with out no out put to spark up electrode, can you please Troy light on the possible causes that can cause output problem and how to fix it
best regards for your valuable appreciation in your case, first of all verify the dc voltage at main dc capacitor then check low voltage power supply for 5 volt 15 -15 volt then check the current setting pot then verify the IGBT drive, if no drive is there then check control card aslo check video number 286, 287, 288, 289, 291, 292 & 293 every video is to discuss each sub section and its components and their function and its test troubleshooting
I have this welding machine that doesn't weld. i noticed the IGBTs were gone. i have removed and replaced but it still not welding. on the multimeter at 200-ohms reading, the resistance is 20-ohm from gate to source even when mosfet are absent am i missing something
Thanks for sharing! I have IGBT welding machine, has display but no output... I will try to diagnose based on your tutorial..hoping to see the trouble...
Hi, I'm from Cuba and I just watched your video, I had a problem with a TIG200 Ac welder, It blows up the 4 mosfet bridge after 2 min of working. It uses a driver card with 4 gate controllers and 4 mosfet in H configuration, and the driver card doesnt have blown up components. Do you think its a conmutation problem, have you seen anything like this?? Best regards...
welcome dear it happens when gate driver component (for any single mosfet or pair of mosfet) is bad driver card of pulse forming network for full bridge drive is not working good if the allowed deadtime between both channels is low and both channels are overlapping (check signal with oscilloscope) might be low quality components, that doesn't meet the product standards
@@HaseebElectronics Can I watsapp you, I wrote to Electronic Corner for the driver tester, but I think he is more interested in money than helping people, besides I want to show you this SEMIKRON full bridge mosfet encapsulation and what I did to replicate him...
Sir g mere pas ikk igbt machine hai uss ki low voltage 24volt ban rahe hai set ok hai jab fan ki wire lagate hai set off ho jata hai kya problem hai please help me
AS. please explain that why positive voltage to collector of the igbt and negative to the emitter? I mean we generally see the source connected to the emitter side of the transistors at the circuits. So it is supposed to be connected both positive and negative to the emitter side. but here this is different type connection.
yes we can. in welding machine the feedback is based on output current to convert it to voltage regulation, the feedback will be converted to voltage mode feedback
Sir kisi bhi ic accoland Google per kaun si site se search Karen please bataiye sir main aapki video dekhta hoon video dekh kar kafi kuchh sikhata hun aapki video bahut acchi video banate hain sir please iske bare mein bataen
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 ? I haven't 24v in the line 24v. I applied 24v and it starts to show 25.5v. The cooler try to rotate. But don't rotate. I pit other and it spins swiftly. I also heard a noisy sound probably in 24v transformer and relay is not arming. What you experience could guide me now sir ?
hello sir, I have a chinese TIG/MMA 215, it powers on normql output voltage, but upon touching the welding rod to working material it goes to protect, oc led lit, removing the load it swithes back to normal, it won't burn the welding rod, what could be the fault in my welder?
it means the over current detection circuit is active, it happens when input current excceds than the output current, check the current transformer circuit, in control board might be there is operational amplifier, which detects the signal from the current transformer and output shunt resistance check there are potentiometers for calibration. try to adjust the over current limits and reduce the current transformer circuit's signal
What happens when i haven't output power (0v) ? I tested all welder machinr (IGBT = Ok, poliester cap 250v with 4.6 uF and 0.02 esr 2 caps with similar measurement = ok ,4 diodes for high current withou shorts, 2 mains capas got 297V each, pulses which comes to thr IGBT is not square. Any help ?
Excelent video! but what about if I have arround 90V-100V at output of the welding machine? That means arise of capacitance and too low impedance or any other problem? Thank you
if you have excessive voltage that is due to pwm control card. when it's duty cycle will increase, then the output voltage will increase. it might be duw to the feedback network (operational amplifier connected with output current sense shunt resistor)
Merhaba bende zx7250 mini welding Var kartın pozitif çıkışına tetikleme role bağlamak istiyorum( starter relay ) Nereye bağlamam gerekir Selam aleyküm , I have a zx7250 mini welding and I want to connect a trigger relay to the positive output of the card (starter relay). Where should I connect it?
12volt 200 A Relay bağladım kaynak yaparken relay yapışıyor I connected a positive output 12volt 200 A Relay, the relay sticks while welding and does not let go.
@@HaseebElectronics thanks for the info , but in your case wherein you had repaired so many welding machines , what did you encountered most, open or close? specially in your tutorials
in some models these are open contact type and other use close contact type most of the time their temperature sense response gets slower due to bad thermal conductivity. in this situation it doesn't Sense the temperature properly so that the ight get damaged while the thermal switch is sleeping. removing the dirt, dust, applying thermal paste, it clears this problem in some cases it needed to replace it
thank you for explanation. we have one problem in our smps. we have multiple output smps in our machine. when we check output side of smps, it was showing 15v dc but battery charging voltage is not coming. there is no short circuit in put side . i checked voltage at capacitor 313v coming. but chopper transformer output side is no voltage. i checked opto coupler voltage at 1.070 v coming may be problem in chopper transformer or how to check chopper transformer
I am little bit confused from your question, because you said multiple output transformer, you have 15 volt, you have no output, you have 1.07 volt on optocoupler input. many thanks are mixed together 1. if you find 1.07 volt on optocoupler that is the biggest proof that the smps controller and high frequency transformer is working good please send a picture to my WhatsApp 00962 79 1161 084
Very educative videos sir. Now i have this question........ What could be the cause for the igbts always failling upon switching on? (reference is made to the welding machine ZX7-250 IGBT machine make)
So I'm pretty sure that I have a problem with a power relay for my machine and it stops the fan from coming on and the machine will shut down in saftey mode.
some times, the fan is faulty due to excessive humidity,hot weather dust, rust and its internal circuit becomes short circuit sometimes the power supplies is not capable to produce enough current due to its regulation failure check polarity of the fan wires connect fan and check voltage on connector. if voltage are stable check fan if voltage drop, replace fan and then check voltage if voltage drop with new fan, then check power supply
I have a welding machine with one card, it was not working, but I fed it 24v, so the screen and the fan worked, but there is no output, knowing that the ignt is intact and the schottky diode is intact. Can you help me fix it?
impresionnant votre explication chapeau bas dear i have an issue with the same [ the display fluctuate from 80 to120 with no output can you please help] cheers
best regards and special thanks. if it is fluctuating, that means there may be something wrong at inrush protection. please check the main relay at input AC voltage (parallel to the NTC / PTC thermistor) reply when you verify it. i think this is main cause for restarting of the circuit (causing fluctuation) 2nd possibility, check low voltage power supply (24 volt smps circuit for regulated voltage)
sir for you information when i measure the output voltage at the transformer it seem too high [40vdc] i removed the transformer to have free space and i noted that there are a dry solder on a resistor [5.6kohm] many thanks for your help the machine have already test and deliver to the customer
Sir, single board ki machine hai isme output terminal pe 110 dc volt aa rha hai jiske wajah se one touch OC ho jata hai, 50, 60 volt hone se welding thik hota hai. Is 110 volt ko kaise kam kare ye kyon ho rha pls bataye. Thankyou
hello welding machine yeswelder 135 ampere 110 voltage but my region is 220 voltage How can I convert this machine to 220 voltage? Which elements do I need to change?
Hello dear Thank you for this informative video One question the flyback transformer next to the igbt 22 252525 How can we test it with ohm meter Pin1 and pin 2
Aapko bagwan lambhi umr de apke samajhane ka trika grate h sabhi video apki sabji video dekhi h mene
thanks bhai Ji
There's no videos like this on RUclips so far. Very informative and detailed video on electronic welding machine sir. Thank you very much.
most welcome
you can also check my urdu channel (haseeb electronics Urdu) to watch my videos in Urdu / hindi language as well
بہترین معلومات سدا خوش رہو
My best engineer...👍
I’m a welding service technician in australia(very new to it 10months) this video was amazing. Very thorough and helpful to me. Thank you very much! This has helped me heaps as I don’t get much training at my job.
I love this ckannel and its content,Sir you are actually taking my passion in electronics to the next level,God continue blessing yoy
Very excellent video nothing like this on YT. You made it very simple and straightforward. With a lot of respect. Your videos should be archived because these are master level tutorials and study cases. Highly recommended. Thank you very much.
Nice share dear friend , i like , nice work and video , complete watch
Thank you so much 🙂
Mashallah, salam from indonesia 🎉🎉
wa alaikum salaam dear brother
My brother is best engineer and a great human being. Thanks for sharing
Very 100% educational videos. Thank you.
انا من المغرب اعجبني هدا الشرح الممتاز تحية لك
best regards and special thanks
Good tiching karte hai 👍👌👍👍👌👌👍
special thanks
Very easy to follow. Repaired my unit frustration free due to this. Much better approach than the "symptom >> throw parts at it" approach. Thanks!
wow it is awesome. it is my pleasure that my efforts are helping
Sir pull up and pull down resistor deep me video banaye please . Sir aapKe video me root video hote hai jo hame knowledge ko high level par le ji jate hai.
great this video was very help for me from Chile
It is my pleasure 💕
28:35 You have 3 hands! Amazing! 😱😂
hahahhahahhahhahhah the fourth hand was hidden as well.
i am thankful for our deep observation, this was my subordinate learning the troubleshooting techniques
Asalm aliykum sir so nice
Thanks and welcome
What else can I say more than expressing how well you explain this topic?
Walikum Salam! Great StaY Blessed 😇🇨🇳🇵🇰 Still watching 👍🏻
Thanks you so much sir ,,,, i like this videos❤️❤️❤️❤️❤️
Most welcome
Sangat bermanfaat, salam support dan sukses selalu
MashaAllah haseeb bhai u r amazing engineer easy explained
Stay blessed always 🙏
اخوك من مصر واحبك في الله على هذه المعلومات القيمه جدا وارجو المواصله في جميع صيانه ماكينات اللحام بانواعها المختلفه الارجون والكهرباء والسي توco2.migmag
Thank you Muslim man for your information.. and I thinking to manufacture in future انشا الله to make our Arabia module welding machine
Very informative video thanks for sharing 👍👌
This video is very informative i learn a lot
Always enjoy your teaching video and knowledge ,I have learnt alot myself from watching your great teaching as you explain things so well ,Many thanks to you.
You are very welcome
Recien me estoy iniciando en la reparecion de estas maquinas de soldadura, y encuentro sus explicaciones muy acertadas y muy bien dirigidas, felicitaciones y muchas gracias por sus aportes
Did u connected the bridge rectifier to direct ac current
first bridge rectifier is operated through soft starter circuit, then it is directly connected to line voltage, because it is high power circuit
Your always aknowleged properly thanks habbees
You are so welcome
thank you very much sir...very clear explanation,easy to understand sir...god bless.
You are most welcome
I received a single board. there was not any igbt. when i install 60T60 it doesn't do anything. when i install 60N60 its runs normally but igbt get hot within few seconds even bulb in series and without any load. do you have any idea what could be the season ? Thanks
Simply excellent information!!! 🧡🧡
best regards
Wooh this is the best esplaination have ever gotten thanks man nice one and a big thumb up for you
Pls am trying to fix one inverter welding machine with out no out put to spark up electrode, can you please Troy light on the possible causes that can cause output problem and how to fix it
best regards for your valuable appreciation
in your case, first of all verify the dc voltage at main dc capacitor
then check low voltage power supply for 5 volt 15 -15 volt
then check the current setting pot
then verify the IGBT drive, if no drive is there then check control card
aslo check video number 286, 287, 288, 289, 291, 292 & 293 every video is to discuss each sub section and its components and their function and its test troubleshooting
Vèry informative..thank you so much.
You are welcome!
Thanks a lot. It's very Educative.
I have this welding machine that doesn't weld. i noticed the IGBTs were gone. i have removed and replaced but it still not welding. on the multimeter at 200-ohms reading, the resistance is 20-ohm from gate to source even when mosfet are absent
am i missing something
Hope & pray for your well my respected brother... Once again a fantastic job by you...
My bundle of wishes are always with you 🙏💐
thanks dear sister. thanks a lot for your valuable visit. stay blessed
Mantap Kak.....
Haseeb Electronics
My igbt is not displaying and also not working when I opened I so one varistor blown what would be the problem
varistor can damage any time because it is a protection for high voltage spikes
Gracias saludos desde South America , thanks
Please put the romanian subtitle thank you
Very helpful video👍👍👍 like👌👍
Many many thanks dear sister
Thanks for sharing!
I have IGBT welding machine, has display but no output...
I will try to diagnose based on your tutorial..hoping to see the trouble...
Hi, I'm from Cuba and I just watched your video, I had a problem with a TIG200 Ac welder, It blows up the 4 mosfet bridge after 2 min of working. It uses a driver card with 4 gate controllers and 4 mosfet in H configuration, and the driver card doesnt have blown up components. Do you think its a conmutation problem, have you seen anything like this??
Best regards...
welcome dear
it happens when
gate driver component (for any single mosfet or pair of mosfet) is bad
driver card of pulse forming network for full bridge drive is not working good
if the allowed deadtime between both channels is low and both channels are overlapping (check signal with oscilloscope)
might be low quality components, that doesn't meet the product standards
@@HaseebElectronics Can I watsapp you, I wrote to Electronic Corner for the driver tester, but I think he is more interested in money than helping people, besides I want to show you this SEMIKRON full bridge mosfet encapsulation and what I did to replicate him...
no problem
please send to 00962-79-1161084
It was a very nice work. I watched it with pleasure.
I left my gift ,
Lk 178 wonderful sharing
Ads was too long😊
Keep it up
Doing good jon
Thank you so much 🙂
MashAllah amazing content and appreciate you ❤️❤️
Allah Bless you Ameen🌺💕🌺💕🌺
السلام عليكم ما شاء الله بتوفيق دائما يارب أخي
Lk 12 walekum Salaam bhai
Very well explained 👍😊
Sir g mere pas ikk igbt machine hai uss ki low voltage 24volt ban rahe hai set ok hai jab fan ki wire lagate hai set off ho jata hai kya problem hai please help me
Great presentations.
#vedikworld
Nice sharing👌👌
AS. please explain that why positive voltage to collector of the igbt and negative to the emitter? I mean we generally see the source connected to the emitter side of the transistors at the circuits. So it is supposed to be connected both positive and negative to the emitter side. but here this is different type connection.
Can we varry the out put voltage of welding machine?
yes we can.
in welding machine the feedback is based on output current
to convert it to voltage regulation, the feedback will be converted to voltage mode feedback
Hi engineer, I have a problem of not knowing how to differentiate bjts, igbts and mosfets physically from one another
Thank you so much for taking the time to make these videos 👍🙏
My pleasure!
please accept my best regards
Can we use voltage drop method at high frequency to test non polar capacitors??
big thumbs up thanks for sharing stay blessed and happy good morning have a nice day
Kindly make a full video on practical inverter full bridge design and construction.
Thank you
Sir kisi bhi ic accoland Google per kaun si site se search Karen please bataiye sir main aapki video dekhta hoon video dekh kar kafi kuchh sikhata hun aapki video bahut acchi video banate hain sir please iske bare mein bataen
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 ? I haven't 24v in the line 24v. I applied 24v and it starts to show 25.5v. The cooler try to rotate. But don't rotate. I pit other and it spins swiftly. I also heard a noisy sound probably in 24v transformer and relay is not arming. What you experience could guide me now sir ?
Good work my brother God bless you 🙏 💯
Good effort brother
So nice of you
Where do we adjust the output voltage of the inverter? the oscillator adjustment is only for the output current adjustment?
How to measure the voltage at the IGBT gate, should it be 1.6 V? Thanks in advance.
please check video number 549 and 550
hello sir, I have a chinese TIG/MMA 215, it powers on normql output voltage, but upon touching the welding rod to working material it goes to protect, oc led lit, removing the load it swithes back to normal, it won't burn the welding rod, what could be the fault in my welder?
it means the over current detection circuit is active, it happens when input current excceds than the output current,
check the current transformer circuit, in control board might be there is operational amplifier, which detects the signal from the current transformer and output shunt resistance
check there are potentiometers for calibration. try to adjust the over current limits and reduce the current transformer circuit's signal
Mashallah very nice sharing 👍👍
Thank you for the lesson
Always welcome
What happens when i haven't output power (0v) ? I tested all welder machinr (IGBT = Ok, poliester cap 250v with 4.6 uF and 0.02 esr 2 caps with similar measurement = ok ,4 diodes for high current withou shorts, 2 mains capas got 297V each, pulses which comes to thr IGBT is not square. Any help ?
Excelent video! but what about if I have arround 90V-100V at output of the welding machine? That means arise of capacitance and too low impedance or any other problem? Thank you
if you have excessive voltage
that is due to pwm control card. when it's duty cycle will increase, then the output voltage will increase.
it might be duw to the feedback network (operational amplifier connected with output current sense shunt resistor)
nice work dear bro thanks for sharing. stay blessed
Merhaba bende zx7250 mini welding Var kartın pozitif çıkışına tetikleme role bağlamak istiyorum( starter relay )
Nereye bağlamam gerekir
Selam aleyküm , I have a zx7250 mini welding and I want to connect a trigger relay to the positive output of the card (starter relay).
Where should I connect it?
12volt 200 A Relay bağladım kaynak yaparken relay yapışıyor
I connected a positive output 12volt 200 A Relay, the relay sticks while welding and does not let go.
Is the temp sensor shorted for normal operation?
there are 2 types.
one is normally closed
other is normally open
@@HaseebElectronics thanks for the info , but in your case wherein you had repaired so many welding machines , what did you encountered most, open or close? specially in your tutorials
in some models these are open contact type
and other use close contact type
most of the time their temperature sense response gets slower due to bad thermal conductivity. in this situation it doesn't Sense the temperature properly so that the ight get damaged while the thermal switch is sleeping.
removing the dirt, dust, applying thermal paste, it clears this problem
in some cases it needed to replace it
Which electronic part is responsible for raising and lowering the electric current during arc welding?
thank you for explanation. we have one problem in our smps. we have multiple output smps in our machine. when we check output side of smps, it was showing 15v dc but battery charging voltage is not coming. there is no short circuit in put side . i checked voltage at capacitor 313v coming. but chopper transformer output side is no voltage. i checked opto coupler voltage at 1.070 v coming
may be problem in chopper transformer or how to check chopper transformer
I am little bit confused from your question, because you said multiple output transformer, you have 15 volt, you have no output, you have 1.07 volt on optocoupler input. many thanks are mixed together
1. if you find 1.07 volt on optocoupler that is the biggest proof that the smps controller and high frequency transformer is working good
please send a picture to my WhatsApp 00962 79 1161 084
Ok i will send copy tomorrow
love&like...you teach schematic diagram inverter
best regards and special thanks
Very educative videos sir. Now i have this question........ What could be the cause for the igbts always failling upon switching on? (reference is made to the welding machine ZX7-250 IGBT machine make)
So I'm pretty sure that I have a problem with a power relay for my machine and it stops the fan from coming on and the machine will shut down in saftey mode.
some times, the fan is faulty due to excessive humidity,hot weather dust, rust and its internal circuit becomes short circuit
sometimes the power supplies is not capable to produce enough current due to its regulation failure
check polarity of the fan wires
connect fan and check voltage on connector. if voltage are stable check fan
if voltage drop, replace fan and then check voltage
if voltage drop with new fan, then check power supply
Thanks for the video.. you're the best ☺️☺️.. please what is the amperage of the rectifier?
Nice Friend 👍😉
Keep going nice 100 like
I have a welding machine with one card, it was not working, but I fed it 24v, so the screen and the fan worked, but there is no output, knowing that the ignt is intact and the schottky diode is intact. Can you help me fix it?
impresionnant votre explication chapeau bas dear
i have an issue with the same [ the display fluctuate from 80 to120 with no output can you please help] cheers
best regards and special thanks.
if it is fluctuating, that means there may be something wrong at inrush protection.
please check the main relay at input AC voltage (parallel to the NTC / PTC thermistor)
reply when you verify it. i think this is main cause for restarting of the circuit (causing fluctuation)
2nd possibility, check low voltage power supply (24 volt smps circuit for regulated voltage)
@@HaseebElectronics
dear sir many thanks
i will check it and reply afterwards
cheers
sir for you information
when i measure the output voltage at the transformer it seem too high [40vdc]
i removed the transformer to have free space
and i noted that there are a dry solder on a resistor [5.6kohm]
many thanks for your help
the machine have already test and deliver to the customer
Very clear explanation. Thanks for teaching me sir
Super likeeeeeeeee 😉👍
Sir, single board ki machine hai isme output terminal pe 110 dc volt aa rha hai jiske wajah se one touch OC ho jata hai, 50, 60 volt hone se welding thik hota hai. Is 110 volt ko kaise kam kare ye kyon ho rha pls bataye. Thankyou
Always amazing 😍 give you 👍 good luck my brother 👊
very well explained ! TY
You are welcome!
My welding machine fan not working contusly it's off suddenly ,not welding properly what needs to check
please check temperature sensor
or may be some dry-soldering on some power related components
Very good engineer
hello welding machine yeswelder 135 ampere 110 voltage but my region is 220 voltage How can I convert this machine to 220 voltage? Which elements do I need to change?
nice tips
nice up loud thanks for sharing like
Thanks for visiting
Can you please explain how pulse forming network works..
sure a detailed series is upcoming very soon by this week
Hello dear Thank you for this informative video
One question the flyback transformer next to the igbt
22 252525
How can we test it with ohm meter
Pin1 and pin 2
Sir how to identify type of igbt used in welding machine , that it has a built in diode Or without diode, when they blast.. Please help..
Thanks for shearing good knowledge my brother I watch and like video please thanks
So nice of you. stay blessed
Hello sir, pls am having problem with inverter welding machine, d amps is not increase pls help me out sir.
Excellent information on welding machine