Re: [Emc-users] A simple LinuxCNC system

[John Dammeyer]

> From: Phill C [mailto:phillcarte...@gmail.com]
> 
> > On 29 Apr 2020, at 11:29 am, John Dammeyer <jo...@autoartisans.com> wrote:
> >
> > As far as LinuxCNC goes, to me it appears the parallel port code given the 
> > steplen calculations there isn't a way to bring the step
> pulse low again during the same BASE_PERIOD interval which in the HAL file 
> example is 24uS not 10uS.   Therefore I interpret the
> step pulses to be twice the BASE_PERIOD time.
> >
> 
> double step on this page may do that 
> <http://linuxcnc.org/docs/2.8/html/hal/parallel-port.html
> <http://linuxcnc.org/docs/2.8/html/hal/parallel-port.html>>

Probably the reason my head was wrapped around nanoseconds is because the HAL 
file for the MESA 7i92H has:

# these are in nanoseconds
DIRSETUP   = 1000
DIRHOLD    = 1000
STEPLEN    = 2000
STEPSPACE  = 1000

John




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