New owner of a Millermatic 200 with motor trouble

[Gazel_Ruler]

Just picked up a Millermatic 200, around 1988, and I'm trying to get it running. It powers up fine (contactor clunks, gas solenoid clicks), but the wire feed motor won't move at all. I jumpered the gun connector to rule that out, but no luck.

The confusing part is the manuals I've found don't match my setup. The '87 manual shows the older 4-wire motor, the '89 shows the 2-wire motor with a 14-pin connector. Mine has the newer 2-wire drive motor but still has the old 4-pin spoolmatic connector. The schematic in the machine (B-114266) isn't in either manual.

I've got an SKP-35 Spot Stitch panel in there too, and I'm thinking about bypassing it to see if the motor runs. Before I go too far, I'd really like to track down the right manual or schematic for this version. Anyone sitting on docs for the "in-between" Millermatic 200s?

 

[_g33km3ist3r]

@Gazel_Ruler you're correct, that's a transitional model and your best bet for the manual is to email Miller support with your schematic and serial number. In the meantime, bypassing the SKP-35 panel is the right move. If that doesn't work, check for DC voltage at the motor leads with the trigger pulled to determine if the fault lies with the motor or the control board.

 

[careerMan#01]

I don’t have the exact manual, but a lot of people in your situation have had luck reaching out to Miller directly guess, prolly they can often provide the schematic for your serial range. Bypassing t might work, but it’s worth confirming the wiring first so you don’t fry anything

 

[Kaplanwelds]

That's a weird hybrid setup, miller must have been transitioning parts mid year. SKP-35 bypass is smart troubleshooting, but first try Miller's tech support with that schematic number.