Speed - Parallel vs serial ( was Re: Motor

> the driver, leaving the other two open. This mean there are only 4
> possibilities and they are:
>
> A and A' no good
> B and B' no good.
> A and B good
> B and A' good

Sorry, no of selections should be 4x3/2x1 = 6. The 2 left out are

A and B' good
A'and B also good.

The rest should still apply.

> The question is, what happen when you connect A and A' and B and

B'?

> I guess the motor will not turn, but no harm will be done to the
> driver/motor provided voltage, current setting are within

permissible

> limits. (hope the experts will elaborate on this)
>
> When wired in the other 2 (good) possibilities, the motor will

turn,

> only thing is, if polarity is wrong, motor will turn opposite to
> intended sense. A simple remedy will be to reverse the pair
> connection or reconfigure the controller.
>
> In any case, I believe the way to approach this is
>
> 1. determine the paired wires with multimeter
> 2. pick any 2 pairs, connect them to the driver.
> 3. Test. If wrong pair motor will not turn, probably make noise,

but

> no harm done. (experts please correct if wrong)
> 4. Make a note, pick another 2 pairs.
> 5. At most, you need only 3 trials before you get the motor

turning,

> and at most 4 to get them turning correctly.
>
> Hope I did not give inaccurate info. (disclaimers apply)
>
> Peter