I have been running my lathe using EMC for many years and decided to
upgrade to the latest LinuxCNC. The computer I am using is showing it's
age and the ancient version of Debian I have been running won't even
boot properly on my new computer.
The lathe has a 5i20 and a 7i29 to run the servos. Using the same PID
settings as I had in EMC I get odd random spikes in the Z axis motor
command signal, roughly about one to two a second. If I look at
pid.z.output with halscope I can see the spikes. This is on the same
computer and hardware as I was running EMC, which ran really smoothly. I
changed the computer and the results are the same. I even used Pncconf
to create an absolute minimum spec configuration and it does the same thing.
I tried both LinuxCNC 2.7.9 and Git head. Does anyone have any ideas why
this would be happening?
Les
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