Homemade Plasma Cutter

Plasma Cutter

Plasma Cutter
The Plasmaman on metalwebnews.com
Homemade plasma cutter constructed from surplus automotive and appliance components. Capable of cutting 1/4" steel at 13 amps.
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Cutting Torches
plasma, electronics

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1-4 of 4 comments
jwms says:
Sep 04, 2013 11:18 PM

Just found this site and it looks pretty good. I am starting to build this project. I have a good grasp of electronics and have been around it for some 50 years. I do not understand the connection to the ac side of the bridge; never seen a connection like it in 40 years I have understood schematics. Will try working it out and will post any tweaks here.

daveward says:
Aug 23, 2013 12:39 PM

ultrchoplight:  your willingness to share your experience is VERY helpful.  Thank you!

ultrachoplight says:
Aug 23, 2013 11:27 AM

Some time ago he had plans to sell on ebay and I bought it..I have spend a lot of money to build it and to this day I still can not get to run..I have tried to build it every way to build with no luck..I also have tried to contact him and all I ever got was the run around..He says that it does work well I have a pile of junk

v31joepalooka says:
Aug 22, 2013 11:44 PM

I am curious about two things, at least. I understand the isolation transformer, but why step up or down?  Could it not just be a 120 to 120 VAC? or 240 to 240 VAC?  Also, why tie the AC around the bridge rectifier to the capacitors? V31joepalooka