Re: Servos drivers

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "John Heritage"
<john.heritage@v...> wrote:

> > IF PPS > 45,000 THEN implement step multiplication
>

snip

> If my cps has come out at
> something like 50 kcps, would it just mean that when the gantry

made a rapid

> transverse, it would stop short of where it should, because the

amplifier

> would be collecting more pulses than it could realiably count? Is

this

> counting limit something to do with the amplifier's aliasing limit,

or is it

> a straight up dead stop limit?

It's a limit on the reliable throughput of the parallel port
controller in Windows. It means that you will not be able to
maintain control over your machine position, and the cause may not be
obvious. This is readily solved by using an external controller like
the DeskCNC, 2nd generation, controller which runs up to 125,000
steps per second.

Fred Smith - IMService