View Full Version : Just in case anyone is interested

07-14-2009, 11:05 PM
I have used these once before and have seen reasonable welders do amazing things with them. I am building a test unit before installing it in my truck. ok I cant get the photo
to show but you can see it at


Briggs Motor and 160 amp chevy alternator, internal Diodes and regulator removed. Cheap external 200 amp bridge and a light switch make up the rest. Cheap Torch head from Arc Zone and I have a high freq scratch start TIG that will also burn rod as an arc welder.
Dan in the frozen North

Odd Man Out
07-15-2009, 12:39 AM
So where do you hook up the argon???:punk:

07-15-2009, 01:28 AM
So where do you hook up the argon???:punk:

The weldcraft torch I bought ( not pictured) has a valve on the handle and a hose integral with the cable... just screw it into my flow meter on the argon bottle I already have on my mig.

I might get fancy and put a solenoid and after flow circuit in it but for now it gets me back into TIG

07-15-2009, 08:44 PM
in the picture it is not nearly complete, plans are to finish up the wiring and add some crude feet to it tonight. I might even attempt to spark it up a bit. I will report results and have also learned to post pictures So i will keep you all in loop if there is any interest. I almost forgot, I can provide the model and part number for the torch too if there is need. Also the is at least one web site that has a bread board circuit for pre and post flow solenoid control and a foot pedal.


07-16-2009, 04:27 PM
ok I was asked about the argon connection, here is that end of the torch

and the other end showing how it comes together

and the actual torch showing the gas shut off valve
and a final shot showing how little wiring actually needed to be done, note the black diode set on the back of the alternator is disconnected and is in place only as a spacer so I could use the original screws to attach my ground wire (for the brushes).

Now I am going outside to test the arc welding function before I clean up the wiring and make a single control panel and mount a starter battery for the engine.


Odd Man Out
07-16-2009, 04:57 PM
Great ingenuity

Gotta love Rube Goldberg!!!

Next you need to come up with a high freq pulse set up...:punk:

07-17-2009, 03:22 AM
Well it turns I dont have a regulator to fit my torch, so I was forced to burn some rod as a straight stick machine tonight.

Burned a couple of 1/8 rods and i was very pleased with the machine (not so much my performance. The thing make a very high pitched squealing in use (I think from the very high frequency ripple of the current itself ?) and seems to give pretty nice control and penetration. I think I like it. mounted under the hood this thing could come in quite handy might have to visit the local welding house this weekend and see what i can come up with for a regulator ( or flow meter) that matches my hose.


07-18-2009, 09:35 PM
Alright Jury rigged some argon into my torch head and had at it, had to turn it way down but it sparks up a TIG head.

I was able to weld shut some holes in very thin material and i have no more than a couple minutes experience TIG welding ( 20 years ago) I found it very easy to start an arc ( they call it scratch starting but if I had clean metal i did not even need to make contact just get close ) and it seemed pretty stable to me. Very pleased with this set up. Just need to clean the thing up a bit and then I plan on using it heavily.. we'll see what breaks first.

Thinking about having my son take a video of this thing in action. I think people would be surprised on how well it ( not me ) works