![]() but yes, if it's throttled up, with the POWER/WELD switch flipped to POWER, and you take a reading of the WELD receptacle, you'll see some bizzare stuff. Tools with universal motors (brushed-motor drills, grinders) and worklights aren't too picky about power. I'm certain there's people that ignore that switch, and probably find no issue with doing so, but realize that sensitive electronics and electrical devices connected to the RC2 connection will likely not survive long in an otherwise unregulated output. Another contact of S1 is at the Idle Control Board PC1, IIRC it knocks off the auto idle when in POWER mode, so that RC3 gets 60hz AC. In the POWER position, the field boost voltage will be higher, and in the WELD mode, it'll be lower. This winding flows AC through a bridge rectifier, and then into the DC revolving field, so it's boosting the field strength. If you look at the other wiring connections, you'll see that that two contacts of a SPDT segment select a tapped winding at wires 12 and 13. On the same example, the POWER receptacle (RC3) is disabled when in the WELD mode. ![]() ![]() ![]() In the first example I looked at, the RC2 receptacle is ALWAYS live. There's about half-a-dozen changes of the service manual, so without knowing your serial number and looking up THAT machine's diagram, can't tell for certain, but If you look at the diagram, you'll find that the Weld/Power switch does several things. ![]()
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