[kusmanf]

I have a 5 phase unipolar stepper motor with 5 wires and I need it to be used with a bipolar motor driver (A4988). Could anyone help me in this regard?

[john-100]

the only way to use the unipolar motor with a bipolar driver is to modify the motor
and re wire it, if possible to make it into a bipolar motor

NOTE - with some motors you must keep the rotor in place while you rewire it
otherwise the rotor will be be partly de-magnatised !
and not all motors are easy to re-wire as the common joint is not always easily accessible !!!!

in the 5 wire unipolar motor you will find one end of each of the 4 coils go to a common wire
and will need to be separated and re-connected to form two independent coils

Attachment 385834

Attachment 385836

John

[kusmanf]

John, Thank you for your quick reply. I shall try it and come back to you. Regards. kusmanf

[Eldon_Joh]

if you actually have a 5 phase stepper motor with 5 wires then you have 5 coils connected in a pentagram and no you can't simply turn it into a bipolar 2 phase stepper motor.

you could probably get it to run, but at low rpms you would have non constant step widths, at high rpms you would have really bad resonant problems and lack of torque.

[kusmanf]

Thanks for the advice.