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Thread: USB stepper drive system
www.piclist.com/techref/io/steppers.htm?key=stepper
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face BY : Roman Black email (remove spam text)



Antonio L Benci wrote:
>
> This combination seems to work for me:
>
> PC98 -> USB to RS485 interface -> CNC system.
>
> As the CNC system is not a high bandwidth system the 9600bps RS485 end
> does not load the buss.


Hi Antonio, what about CNC drivers that require
the industry standard step/dir pulses that
must be at exact and often quite high frequencies?

Like 3 pulse streams of differing f at 10kHz to
40kHz that need exact pulse timing?
There is only a few bits, but high speed timing
is critical.

Would USB handle this? This is quite possible
through parallel port in dos environment but I
would be worried about timing using USB..?
-Roman

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