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greywuuf
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

http://www.flickr.com/photos/40438990@N07/3722631360

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:

greywuuf
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

greywuuf
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.

Dan

greywuuf
07-16-2009, 04:27 PM
ok I was asked about the argon connection, here is that end of the torch
http://farm4.static.flickr.com/3444/3726766435_445960c776.jpg?v=0

and the other end showing how it comes together
http://farm3.static.flickr.com/2621/3727570818_c2cb316464.jpg?v=0

and the actual torch showing the gas shut off valve
http://farm3.static.flickr.com/2673/3727568028_a09b4f59c1.jpg?v=0
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).
http://farm3.static.flickr.com
/2673/3727568028_a09b4f59c1.jpg?v=0

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.

Dan

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:

greywuuf
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.

Dan

greywuuf
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