On 10/10/2016 08:39 AM, Gene Heskett wrote: > The running spindle did emit a fairly heavy > click, I assume because it was already turning at 400 revs, but my > halfile does a boot sequence on Jon's pwmservo driver that runs the > spindle any time a stop/start is done, this reboot of the spindle driver > is inserted. You only need to do the "boot sequence" once after the enable input to the servo amp is turned on. You really do NOT want to do it when the motor is running, as it sends a 1 ms reverse command to the motor.
> No other indications of an error but I did note that the former spindle > speed would drift downward and if I sat there scratching my head long > enough, it would even start running backwards, very slowly gaining > speed. This sounds like maybe the closed loop PID is getting fouled up, somehow. And, there is no need to stop the spindle before changing speed. Jon ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
