piclist 2001\01\03\162413a >
Thread: USB stepper drive system
www.piclist.com/techref/io/steppers.htm?key=stepper
face picon face BY : Olin Lathrop email (remove spam text)



> > We NEVER rely on the PC for accurate timing requirements ;-)
>
> Any reason??
>
>
> > So long as the timing requirements are not USB dependant. A programmable
> > indexer which communicates via USB to a PC would be fine...
>
> Obviously using separate indexer would solve the
> problem, what I really wanted to know is can you use USB
> for high speed accurately timed output?

Actually USB is specified to have its own accurate 1mS clock.  It is
specifically intended for "dumb" USB devices to use as an accurate clock.


*****************************************************************
Olin Lathrop, embedded systems consultant in Devens Massachusetts
(978) 772-3129, KILLspamolinKILLspamspamspamembedinc.com, http://www.embedinc.com

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