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Welder Repair Adjusting the High Frequency Contacts

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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! ⇨ SUBSCRIBE to Brandon Lund DIY Builds: https://www.youtube.com/brandonlund THE TOOLS & GEAR I USE 🔴 https://www.amazon.com/shop/brandonlund Any commission earned from the above Amazon affiliate links all goes towards helping to support my channel. FOLLOW ME (for behind the scenes stuff)! ⇨ Instagram: https://www.instagram.com/lunddiybuilds ⇨ Facebook: https://www.facebook.com/LundDIYBuilds ⇨ Twitter: https://twitter.com/LundDIYBuilds For Business Inquiries: [email protected] 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!
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Text Comments (26)
joe lepore (25 days ago)
what does one do when the contacts wear out?
Brandon Lund (25 days ago)
Good question but It's not a friction surface so the chances of them wearing out are slim. It's more likely that the board goes. Usually the capacitors will start leaking.
joe lepore (25 days ago)
i have a big question about that welder......when using it in stick mode the ground should be on negative, right of the argon/tig torch connection?.....so when you tig with this machine does one leave the ground where it was for stick mode, to the right of the tig torch connection, or do you put the ground where the stick holder was which should be positive?......i hope i didnt confuse
Brandon Lund (23 days ago)
Thanks man! Be sure to check out this fridays episode. I added some floating shelves to a previous project.
joe lepore (23 days ago)
@Brandon Lund ......i like your metal/wood furniture.......
Brandon Lund (24 days ago)
I think it would work being connected to positive but it's my understanding that by having the torch connected to negative, (DCEN) it keeps the tungsten much cooler...same idea as running the stick function DCEN.
joe lepore (24 days ago)
@Brandon Lund ......great man, I bought one of those cheap amazon tig welders like yours and they are telling me to keep the ground to the negative as in stick mode to tig which man I think that would cause a casualty......scary, don't listen to those Chinese , I had to email them because it came with the wrong manual and I wanted to know what goes where and I saw the inside of yours with the negative and argon connected by a metal bar.......remove that bar and make the argon connection not live.....attach your own torch and cable via a clam shell setup and run the argon hose to their argon connection that isn't live anymore......either they must hate us Americans and want to see us get hurt or they are just plain stupid
Brandon Lund (25 days ago)
@joe lepore sorry man, I just re-read my post and realized I misspoke. When in tig mode you should have your torch connected to negative. Sorry about that.
Gordon Reiher (6 months ago)
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?
Brandon Lund (6 months ago)
@Gordon Reiher 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
Gordon Reiher (6 months ago)
@Brandon Lund Wow, thanks for the detailed explanation! "The more you know" eh?
Brandon Lund (6 months ago)
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.
minouchat (6 months ago)
THANK YOU Mr.Brandon, simple and professional information. You should be a teacher. (a verry good teacher)
Brandon Lund (6 months ago)
Thank you very much!
Ccf Fabrication (6 months ago)
Can u use a foot pedal on that machine? Can’t find a answer online or much info on it?
Brandon Lund (6 months ago)
Curtis, unfortunately it doesnt allow for a pedal.
Michelangelo Lavagno (6 months ago)
very professional explanation thanks Brandon and happy new year
Brandon Lund (6 months ago)
Thank you and Happy New Year to you also! 😁
Justin Case (6 months ago)
Exactly what was happening to my TIG. I did not know what was going on. THANKS.
Brandon Lund (6 months ago)
Glad I could help. Hopefully it runs new again for you.
Tank Soldier (6 months ago)
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
Brandon Lund (6 months ago)
Thanks man!
Tsunami101st (6 months ago)
Simple and informative. Thanks.
Brandon Lund (6 months ago)
Thanks buddy!

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