RE: resonance and controllers

> -----Original Message-----
> From: Joe Vicars [SMTP:jvicars@...]
> Sent: Friday, February 25, 2000 1:59 PM
> To: CAD_CAM_EDM_DRO@onelist.com
> Subject: [CAD_CAM_EDM_DRO] resonance and controllers
>
> From: Joe Vicars <jvicars@...>
>
> I don't understand how the software control contributed to the
> resonance problem that Tim described. The software controller just
> outputs a square wave of varying frequency. If you have control over
> your instantaneous start, accel and decel, then you should be able to
> find an operating range that works. What am I missing?
>

Some programs are not very good at accurately spacing the step
pulses. The variation in timing shows up as harmonics and the effects are
significant.

Doug