Re: Does control s/w affect machine performance? max step rate

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "ballendo" <ballendo@y...>
wrote:

> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
> <davemucha@j...> wrote:
> > I'm not sure if T-CNC or Mach are limited to a total of 45khz of
> all
> > three(4?) axis combined on a move, or if each of 3(4?) can move
> with
> > each getting 45khz ?
>
> Dave, 45000 is the base step rate. At that rate(or a lesser rate),
> any or ALL axes can be stepped simultaneously.

IIRC, Mariss posted a list of maximum stepper speeds based on frame
size. It's not he end-all of charts, but I thought that only the
NEMA23 exceeded 1,000 RPM with any practical energy left to move
anything ?

(couldn't find that post as yet)

It that is the case, then the 45,000hz max step rate of the software
we have surpasses the max the motors can use.

If that is the case, then the software we have available in almost
all quarters has the ability to out-step the motors.

Also, increasing stepper speed futher approches the area of
dimminishing returns. To that end, I don't see the need to have
faster pulse rates for steppers.


Dave