Re: [CAD_CAM_EDM_DRO] Re: Why do stepper motors lose their magnetism when disassembled? and a dc treadmill motor ?

Dan,

You could determine by experimentation. See how much resistance across
the blue wire pair. Put a voltmeter across the blue pair, and see if a
voltage is generated when you spin the shaft by hand.

Apply power to the "other" wires, see if motor spins. See if there is a
voltage on the blue pair when the motor is turning.

If motor doesn't turn with voltage on the "other" pair, you may have a
DC motor with separate field and armature circuits, in which case you
would connect the black and blue sets either in series or parallel.

Do you know how the motor was wired in the original treadmill, or did
you buy the motor as a loose unit?

Dave

danmauch wrote:

> In tread mill motors what are the two blue wires for? I think they
> are either for a magnetic pichup for rpm or a temperature sensor but
> am not sure. Anyone know what they are? I hate to take the motor
> apart just to see.
> Dan
>