I’m looking to implement a measured RPM display via a single PPR trigger on
my spindle. Let’s say it’s on parport.0.pin-13-in. I’ve used some of the
web-mentioned articles to get the pyVCP display bar in Axis (that works ok),
but it’s a matter of actually capturing the frequency from the hardware pin
and converting it to a useable float. The nist-lathe example appears to be
using the motion module, and trying to push the hardware bit into that
counter example has failed so far. I’m reading that EMC 2.1 trunk is
depreciating the counter module and replacing it with enhanced encoder
module, but I’ve seen no updated docs on it yet.
My purpose is just to view the RPM on screen, as my mill spindle is manual
and not commanded by EMC (that will come later). I’m not looking for closed
loop here, just a gauge of RPM.
Thanks,
Ted.
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