Spent about 6 hours finding and wiring a reversing relay for my 8 Amp, 58/105 DC volt, shunt wound GE motor. Worked like an absolute charm but I decided to see if it could stand being reversed without stopping. The smoke came out!
The field's still getting the full 58 volts but the armature voltage (sadly) is now only working between about 19 and 36 volts. (no longer up to 105 V)
Probably asking the impossible but can anyone offer any suggestions as to the probable cause of failure. And might it be possible to strip out the speed control circuit (if it is screwed) and run the motor at its full rated speed using current directly from the full wave rectifier?
Had planned to to run this motor on a small lathe.
Thanks T
(Spam address)