On 22 August 2014 14:29, John Alexander Stewart <ivatt...@gmail.com> wrote:
> Q: no documents close by, so maybe a dumb question. How did you invert the
> step outputs?

With software step generation you either tick the "invert" box in
stepconf, or add a line to the HAL. (
http://linuxcnc.org/docs/html/hal/parallel_port.html#_parameters )
With a Mesa board you set the invert_output parameter on the GPIO pin
that corresponds to the stepgen step line:
http://linuxcnc.org/docs/html/man/man9/hostmot2.9.html#General Purpose
I/O




-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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