Re: [CAD_CAM_EDM_DRO] Re: Question 3Axis(w/4 step motors) machine

Not at all !
This is a well-known common question, and will not work except very
poorly at very low speeds, under 100 rpm.

There are multiple technical explanations about this, some from Mariss
at geckodrives, who has designed and sold over .5 million stepper drives.
You need 1 driver / 1 stepper.

IIRC, the reasons have to do with the very small mechanical/electrical
differences within 2 motors.
We are talking here about microseconds, and differences of 0.001 degrees
of turn of the motor, or less, which are enough to make it work very poorly.
The 2 motors will fight each other, leading to heating, resonance,
vibration and very poor performance.

> Depending upon the ampage of the motors and the drive current that you
> have from a single axis, you could connect the motors in parallel. I
> see no reason not to do it, especially if you have trouble driving the
> two axis in slave mode.....
> Do test that the motor directions are correct/compatible before
> mechanically linking them of course!
> I have read somewhere that it is quite common to do this, but don't
> ask me where that was!!!
> Greetings from
>
> Andy Mathison
>
>
>

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