I have a two speed electric motor fitted to a large pillar drill (Arboga Type) and had a problem where the motor could be started in either direction just by spinning the chuck. High speed also did not appear to be operational.
The motor has 6 wires and the field resistances would appear to be approximately 26 ohms and 16 ohms. Following the logic through the rotary switch it would appear that when either low or high speed is selected the other coil is left open circuit.
If anybody has any knowledge on this type of motor I'd be grateful.