Just looking for some general advice from anyone who has better knowledge of how TIG welders work.
My problem : I recently bought a cheap Chinese 3 in 1 job (TIG/PLASMA CUT/MMA) which came with a "foot control". The pedal however, only utilizes the micro switch and not the pot... IE: it's useless (only starts and stops the arc, no current control)
Inside the welder itself, the DIN socket that accepts the cable from the pedal, has only two wires connected of the 7 available.
Schematics for these welders are impossible to get.
I've read through all the other posts I can find regarding these welders and I'm sorry if there's one that I've missed that answers this question but....
What I need to know is, 1: when a given pedal control on a given TIG welder is implemented, does it only control the "Peek current" or does it also effect the "background current" limit.
And 2nd: has anyone ever managed to dig up a schematic for these welders?
My particular model is a "Proweld CT250P" but looking at the pictures supplied by another contributor for a C250D (I think it was, or maybe it was C500D) it's identical in construction aside from differences in the HV arc start) also, the unit was built by CHIRY (as they all seem to be) or at least, all the boards have "CHIRY" and model numbers for the boards.
I can supply more info and some pics on request, and any info/advice anyone can give would be greatly appreciated.
Thanks,
Jim.
My problem : I recently bought a cheap Chinese 3 in 1 job (TIG/PLASMA CUT/MMA) which came with a "foot control". The pedal however, only utilizes the micro switch and not the pot... IE: it's useless (only starts and stops the arc, no current control)
Inside the welder itself, the DIN socket that accepts the cable from the pedal, has only two wires connected of the 7 available.
Schematics for these welders are impossible to get.
I've read through all the other posts I can find regarding these welders and I'm sorry if there's one that I've missed that answers this question but....
What I need to know is, 1: when a given pedal control on a given TIG welder is implemented, does it only control the "Peek current" or does it also effect the "background current" limit.
And 2nd: has anyone ever managed to dig up a schematic for these welders?
My particular model is a "Proweld CT250P" but looking at the pictures supplied by another contributor for a C250D (I think it was, or maybe it was C500D) it's identical in construction aside from differences in the HV arc start) also, the unit was built by CHIRY (as they all seem to be) or at least, all the boards have "CHIRY" and model numbers for the boards.
I can supply more info and some pics on request, and any info/advice anyone can give would be greatly appreciated.
Thanks,
Jim.
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