mtt.tr
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Actually, it is not entirely correct, swapping any two incoming phases will reverse the motor, swapping over the coil ends will make the motor run badly, with low power, and also noisily. As I explained in my earlier post, we are assuming that all the reds are 1s and all the blacks are 2s, if that assumption is correct then we are feeding the coils at the same end for all three, however we have to know how the motor is wound in order to be sure that we have a progressive rotating magnetic field, and the only way to be certain of this is by experiment, and trial and error till the motor runs smoothly and quietly on load. The problem would be best solved by taking the motor somwhere with normal 3 phase and testing it out, Friendly local motor rewinder perhaps?
That's what was said unless i misread it ive already stated that winding polarity is highly important.
Ive had motors in the past missing all labels and have tested / proved correct polarity.
This is the only modern day use for a center galvometer