Re: [CAD_CAM_EDM_DRO] Hairbrained idea, just slightly OT

hornadayb wrote:

> Hello all,
>
> Is it possible to fasten two weak steppers together (same steps,
> same type even) to get a more usable torque range?
>
> The reason I as is: I have quite a few old 5-wire steppers from
> floppy drives just sitting around and was thinking about building a
> plotter and some other useful toys out of them. As they are, they
> are pretty weak but I thought I might be able to energise them and
> conect them mechanically and drive them from the same circuit. Will
> it work?

I think it is not a scheme that is likely to work well. Small tolerances in the
internal parts cause variations in the step sizes at different parts of
the rotation. So, these variations might actually cause the motors to
be "fighting" each other, at least in some regions.

5 wire motors are real difficult to use with good bipolar drives, because
the two phase windings are connected together. 4, 6 or 8-wire
motors work better with a bipolar drive.

Jon