Re: .9 deg/step motor

--- In CAD_CAM_EDM_DRO@y..., Jon Elson <elson@p...> wrote:

> jeffdavis516 wrote:
>
> > Does anyone know why a Vextra 8 wire .9 deg per step stepper motor
> > would not work correctly with a bipolar driver? I have tried this
> > motor with Dan Mauch's 2 Amp driver and it only goes back and

forth

> > when I jog the axis. I know that the driver works because I

tried a

> > normal 1.8 deg per step motor and that stepper works fine.
>
> Are you absolutely sure that you have to coils wired correctly? if

you

> have them wired up to the wrong phases, it will not move properly.
> You might start with just half of the coils, and see which ones make
> it work right. If you have it wired either in series or parallel

with

> just one of the windings backwards, it nullifies the flux for that
> winding, and the motor will behave just as you describe.
>
> Jon

Hi Jon,

Sorry it took me so long to get back with you. I was able to get the
motor to run correctly if as you say I only use two of the four
phases. If I use phase A and B or C and D but I can't seem to make
the motor work when I try to combine all four phases. I have tried
series and parallel using Mariss wiring diagram PDF file to no
avail. I will keep looking, maybe I did something wrong. Servos are
so much easier. :)

Jeff

http://www.homecnc.info