Thanks, Robert. This could very well be the reason the lathe was retired in the first place. I am good opening the motor; I'll take a closer look to see if that's possible. Worst case scenario, I need a new motor. I do have a 3/4hp 3ph motor sitting idle and a VFD that I just pulled from another machine, so that may be a good match-up to give me some more finite speed control.
I measured again in the 200 ohm range. I checked and rechecked connections to ensure I had good contact. All the non-infinity numbers below are new:
Negative to 2, positive to:
Wire 6: 1.6
Wire 8: infinity
Wire C5: 0.8
Wire 7: infinity
Wire E: 1.6
Negative to C5, positive to:
Wire 6: 1.8
Wire 8: infinity
Wire 2: 0.7
Wire 7: infinity
Wire E: 1.8
Negative to 7, positive to:
Wire 6: inifinity
Wire E: infinity
Wire 2: infinity
Wire 8: this time, instantly down to 160 then immediately back to infinity
Wire C5: infinity
Negative to 8, positive to:
Wire 6: infinity
Wire E: infinity
Wire 2: infinity
Wire C5: infinity
Wire 7: this time, instantly down to 134 then immediately back to infinity
Negative to E, positive to:
Wire 6: 0.5
Wire 8: infinity
Wire 2: 1.6
Wire 7: infinity
Wire C5: 1.8
Negative to 6, positive to:
Wire E: 0.5
Wire 8: infinity
Wire 2: 1.6
Wire 7: infinity
Wire C5: 1.8
I measured again in the 200 ohm range. I checked and rechecked connections to ensure I had good contact. All the non-infinity numbers below are new:
Negative to 2, positive to:
Wire 6: 1.6
Wire 8: infinity
Wire C5: 0.8
Wire 7: infinity
Wire E: 1.6
Negative to C5, positive to:
Wire 6: 1.8
Wire 8: infinity
Wire 2: 0.7
Wire 7: infinity
Wire E: 1.8
Negative to 7, positive to:
Wire 6: inifinity
Wire E: infinity
Wire 2: infinity
Wire 8: this time, instantly down to 160 then immediately back to infinity
Wire C5: infinity
Negative to 8, positive to:
Wire 6: infinity
Wire E: infinity
Wire 2: infinity
Wire C5: infinity
Wire 7: this time, instantly down to 134 then immediately back to infinity
Negative to E, positive to:
Wire 6: 0.5
Wire 8: infinity
Wire 2: 1.6
Wire 7: infinity
Wire C5: 1.8
Negative to 6, positive to:
Wire E: 0.5
Wire 8: infinity
Wire 2: 1.6
Wire 7: infinity
Wire C5: 1.8