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That controller is for a DC motor. My Hardinge lathe uses the same design power supply for the DC carriage feed motor. It feeds full 110 volts to the fields and varies the armature voltage for speed control. With full field voltage the motor can produce more torque at slow speeds than ones that reduce both armature and field power.
The field power should be steady, and I would expect 110 v.
I don't see what I would recognize as a rectifier in the picture or the circuit so it may be AC output.
Greg
The field power should be steady, and I would expect 110 v.
I don't see what I would recognize as a rectifier in the picture or the circuit so it may be AC output.
Greg