Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: FXC on April 30, 2010, 06:40:19 PM
-
Everything was fine until today. I did nothing, I changed nothing. I noticed that my steppers sounded a little different when jogging and I discovered that they were running faster than the maximum speed set in the "Motor Tuning" window.
The max I have spec'd is 30 IPM, yet Mach now runs at ~35 IPM when jogging. I changed it to 20 max => ~24 when jogging. Same for feed rates: if the program says F10, Mach goes at approx. 12. And it shamelessly displays this high speed in the "Units/min" box.
I tried changing the motor speeds, the kernel speed, restarting the PC, etc. but nothing works. Mach keeps going some 20% faster than it should. Maybe it had too much coffee, WTH? ???
-
A week has passed and it's still the same. An it looks like this will remain a mystery forever...
Oh well, thanks anyway! :(
-
It could be that you have a multi speed CPU feature where the cpu can slow down and speed up. IF Mach locked in on a lower cpu speed, and then the CPU sped up you might get faster than normal velocities.
Here the CPU runs a touch SLOWER that what mach locked in on SO everything is a touch lower than indicated 10IPM= 9.46IPM
Try rerunning the driver test to see IF it can lock in on the faster speed.
Just a thought