Re: [CAD_CAM_EDM_DRO] EMC - Tuning Stepper rates?

snuckleton wrote:

> I have EMC running on a Linux machine and I
> am successfully moving my x axis stepper.
>
> But the step rate is too high for the motor. In emc.ini,
> I see I can set things like the default velocity, max velocity but
> I don't see anything about limiting the step rate (like
> MAX_STEPS_PER_SECOND = 50)
>
> Does anyone know of a good tutorial on tuning these parameters
> for particular stepping motors?

It is pretty simple. The max step rate is steps per user unit times
max velocity (which is in user units per SECOND). Assuming an
Imperial (inch) unit of measurement, and 1000 steps/inch, then
if your limit is 1500 steps/second, your max velocity will be
1500 / 1000 = 1.5 inches per second. that translates to
90 IPM, which is more familiar to machinists.

You also need to set max acceleration to a reasonable value.
Something around 2.0 (user units per second squared) works
out pretty well.

Jon