Welder is lotos tig200acdc squarwave inverter welder. That's doable would need to add controller before ac is converted to dc then? I do believe the welder is mosfet and not igbt. I assume I could use some type of controller between welder and foot pedal and could also be used between welder and on off switch that comes on a tig torch that simulates pulse function by modding signal to foot pedal and when pedal can't be use switch on tig torch. I'm assuming I would need replace a bunch of stuff to give welder a wider hz frequency operation range? Ac balance just adjust what the work piece sees more dcen or dcp. In your opinion what would be easiest way to mod the signal and use a switch on panel to change between the different wave forms.
Depending on the power level of the input signal, a simple signal generator would work. Without knowing how they're amplifying and filtering the signals, it may work as-is for a wider range, or you may need to change filtering in the amp.
Assuming it's not using much filtering in the amplifier, you could probably get away with a somewhat wider range.
Input will come from a 10k start 7.5k run generator. Gen outputs 237v @ 30 amps to receptacle though I might change breaker to a larger size when I add a voltage stabilizer so welder has a more stable connection as inverters don't do as well as transformer machines when connected to generators. The maintenance shop where im based out of has a 50amp outlet I can run off of. I'm trying find my welders brother as it has a few extra features and a digital display and convert parts needed over so I'd have the pulse functions but can't find nothing on thos cheap bastard other then buying one. I'll tear into mine in Sept when I have a week off for holiday and take pictures of everything then draw out a wiring diagram and parts list schematic and make note of all part numbers and try find a name brand equal I could possibly find parts and mod over. I highly doubt they have filtering for any freq beyond 50/60hz and I don't have a clue how they ampthe signal.
I believe mine to be igbt as it's brother is in igbt just with digital control over features and a memory board for 10 different slots for saving settings
the p version of my welder has a circuit diagram here https://www.uwelding.com/content/manual/Welders/TIG200ACDCP.pdf, its a igbt machine. manual for my welder is here https://www.uwelding.com/content/manual/Welders/TIG200%20Manual%20UW.pdf though i dont have clearance effect pulse width adjustment but im hoping when i find a diagram or break into mine its a analog igbt setup as modding seems more modable
There's a lot of black box stuff going on in that circuit diagram. Since they're doing stuff with computerized control (I assume) it would probably be possible, if you wanted to re-write the code in the microcontrollers.
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