John Kasunich <[EMAIL PROTECTED]> wrote:
> Ing. Milan Pt=E1c(ek wrote:
> > What maximaly pulse rate fraquency is possible reach with using EMC2 through
> > paralel port.
> > For my application is necessary approx. 200kHz. I using the stepper motors
> > with 10.000 microsteps
> > for one revolution.
>
> > In EMC documetation is presented around 20.000 Hz?
>
> The exact upper limit depends on your computer, but is never as high as
> 200KHz.
>
> I think someone once got close to or a little over 100KHz, but they were
> just experimenting, that setup wasn't suitable for real use.
>
> Typically the limit is between 30,000 and 50,000 steps per second.
If you need more, you're probably best off doing the pulse generation
in dedicated hardware, such as an FPGA or microcontroller, attached to
the PC via PCI or parallel port. EMC supports a number of such devices,
listed here:
<http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC2_Supported_Hardware>
--
Sebastian Kuzminsky
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