Welder Repair Adjusting the High Frequency Contacts
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- เผยแพร่เมื่อ 20 ก.ค. 2024
- Welder Repair Adjusting the High Frequency Contacts. Does the ARC on your TIG Welder sometimes not start or maybe when you press the trigger all you hear is a buzzing sound from inside the welder. It could be a very simple and easy fix! Today I'm going to show you how I inspect, clean and adjust the high frequency contacts inside a high frequency TIG Welder and get it running new again.
This video is for entertainment purposes only. There are capacitors inside the case that store energy when the unit is unplugged. You can be electrocuted and die even if the unit is unplugged. Do not open the case. Take it to a professional.
Always read and follow the manufacturer’s safety guidelines before handling tools. Seek professional advice and training before using any welding equipment. Never operate any tool without wearing the proper personal protective equipment. Final warning, Do not attempt to do any of the things you see me doing!
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Disclaimer: These videos are intended for entertainment purposes only and as such, you should not attempt to do any of the things you see me doing. Always read and follow the manufacturer’s safety guidelines before handling tools. Seek professional advice and training before using any welding equipment. Never operate any tool without wearing the proper personal protective equipment. Final warning, Do not attempt to do any of the things you see me doing! - บันเทิง
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You just saved me from a lot of irritation!!!
Adjusted the spark gap, nice and humming again.
Also replaced the broken gas valve as I was in it.
Works like a new one again.
That for a 20 year old Chinese tig welder, woohoo!
Starts from over a cm now!
Right on! I'm glad I could help! @doctordapp
very professional explanation thanks Brandon and happy new year
Thank you and Happy New Year to you also! 😁
THANK YOU Mr.Brandon, simple and professional information. You should be a teacher. (a verry good teacher)
Thank you very much!
Simple and informative. Thanks.
Thanks buddy!
I'm restoring a few I bought cheap. This helps greatly.
That's awesome! I'm glad I could help!
Exactly what was happening to my TIG. I did not know what was going on. THANKS.
Glad I could help. Hopefully it runs new again for you.
Thank you for the informative video and helpful explanation.
Thanks Paul!
Your explanation is simple and clear,
Thanks!
dude god bless. i was looking through all the pcb components looking for a fault, but i think this is my problem
Anytime! Hopefully this is the fix! Please check back. Im curious
OMG Thanks bro... after 4 year this video help me!!
I'm glad I could help! 😁
thank you , Mr. Lund i have been looking for a video like this cause i bought a multiproccessor machine TIG/MMA/CUT a Lotus brand over 5 years ago from pawn shop it turns on just the constant arcing at contacts , no adjustment screws and don't know the gap that it should have but if contacts are correct then its probably the flyback trnsformer or some diodes , i will continue to work on it , and this is first video i have seen about arcing between the contacts, THANK YOU SIR.
Thanks man I'm gload I could help! @alfredocortez7328 L
Very useful on topic... Cheers
Thanks! 😁
tnx sir, this is a big help for me. Godblz
Glad I could help :)
I only have an old ac buzz box , but if I had a tig I would like to know how to fix it ,good video as always ,thanks
Thanks man!
Thank you sir🙏. Besides unplugging, do I need to do anything to the capacitors? Or just stay clear of them? I have an old P&H gen 2 transformer tig/stick machine I’m working to restore. Thanks for any info.
I will check the spark gap on my machine tomorrow. I got zapped so bad when trying it the first time. i think the arc jumped over to the filler and thru my glove. i have feared tig welding since...
Just be careful if you do. Make sure it's unplugged. There are capacitors inside that store thousands of volts of electricity so be carful what you touch.
@@BrandonLund I will discharge all capacitors before i start working on the HF/HV circuit.
I dont want to hear about anyone getting electrocuted
@@TN-kd8ju How do you discharge the capacitors? I need to do this to my machine
Two questions: why is there a gap and (most importantly) There Are Energized Components In There??? I thought I was safe when changing wire rolls on a mig machine, with the unit unplugged .
Or is this just a TIG thing?
Gordon, You will find capacitors in a lot of welders (and plasma cutters) that are NOT transformer based machines. Think of a capacitor as a high pressure tank. It stores normal current at very high voltages until it is needed. An example is a start capacitor in a motor. When the switch to the motor is turned on, the capacitor dumps it's energy giving the motor the extra grunt needed to start. My mig welder is transformer based so it relies on the transformer winding rather than a capacitor. The selector switch or "taps" at the transformer are how it varies the output. This is only a theory, but I believe the high frequency contacts are to limit / protect the current to the capacitors. I haven't experimented with them but I bet closing the gap would make for a very crisp start, but would probably load the capacitor higher than it's rated voltage (shortening it's life), while increasing it would lover the voltage at the capacitors making the arc less crisp or possibly even having to make contact with the tungsten. Your mig machine should not have any exposed line voltage lugs in the cabinet where the user would change reels. You may have exposed DC terminals however that should not be energized when the machine is off. If your mig welder is very heavy, it's probably transformer based, if it's light, it's probably an inverter machine with capacitors. To my knowledge, the gap setting contacts are exclusive to high frequency tig and high frequency plasma cutters. I believe some of the more modern and more expensive machines use relays and resistors in place of the contacts.
@@BrandonLund Wow, thanks for the detailed explanation! "The more you know" eh?
@@gordon4385 Anytime buddy! I wanted to be an electrician ever since I was a little kid so right after High School I went to school for it and had to take a lot of electrical theory and electronics classes. I worked as an electrician for several years but soon realized it was not what I wanted to do. If I can help someone, it makes me feel like my education didn't completely go to waste LOL. Cheers brother
Where can you find the gap for your machine? Eastwood tig 200
You might have to email customer support....if they are willing to tell you. You could also "take it to someone" and have them check the current gap, clean the contact points then try setting it a couple thousands closer and try it.
You mentioned to someone else that closing the gap would create a more “crisp” start. Would that translate to a lower amp start? I’m having trouble with my Primeweld 225 starting at almost max amps then slowly dropping down to the low end when I just barely light the arc with the pedal. Any help would be appreciated, thanks!
That is correct. It sounds like your gap is too large and machine is having a hard time jumping the gap
Ya turns out the contact faces were a little far and not parallel to each other. Fixed that and apparently I was getting some noise in the signal from the rest of the knobs not being in the off position. Thanks again I really appreciate it.
I'm glad you got it fixed!
I have a similar problem where I get the buzzing and a weak arc at the torch but not enough to melt butter. Any ideas?
It could be the contacts, air settings or faulty consumables. Have you tried switching out your consumables?
Is this a good way to do the opposite to disable hf? Got one with non disable hf and cant use it on cars because of the risk of killing the circuts in it.
@Fabian H I'm not sure it would even work if you disabled it. But yes HF will cause problems with the ECU
Can u use a foot pedal on that machine? Can’t find a answer online or much info on it?
Curtis, unfortunately it doesnt allow for a pedal.
My tig capacitor near to the spark gap always blowing after some couple use. Do yo know how to fix it?
Sorry man I wish I could help. That is beyond my knowledge.
@@BrandonLund ty man.
Very good day. Please can someone support me? I have a Miller syncrowave 180 SD from tig. My problem is that I step on the pedal but I can no longer reach the arc. Only that I glued the tungsten of the torch as if it were a rod. I already calibrated the spark gaps but I still can't get the arc. Please help!
Are ypu sure your pedal is working properly?