Heres a video of startup. Notice the low rpm that will not adjust unless u shut it down and raise the rpm before spindle startup.
Lately my VFD GMT 2.2kw spindle has been shutting down. It first started with the motor starting up at a slower rpm and I would adjust the rpm in Mach3. Now The spindle sometimes does not start at all or shuts off during the run. It has seen hobby use for the last 10 yrs
Running only in 30 min cycles max. 3 to 5 times a week. Some if the error msgs read " pwm bumped to min. Or too slow for pulley using minimum... the only thing I can figure is the spindle is shutting down from excessive heat so thermal protection kicking in?
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Heres a video of startup. Notice the low rpm that will not adjust unless u shut it down and raise the rpm before spindle startup.
No Video But this may not be the spindle, at all but it could be getting tired after 10 years with no maintenance, just doing a startup you would not have a heat problem, you still should check the cooling fan is not blocked up so take the top cover off and clean out the air ways in the spindle body as well, you have had it for a long time and should be done every 6 months
I would suspect the control or VFD Drive have you cleaned out the VFD Dive as well, what is the minimum speed you have been running it, you could cook it over time if you have been running it too slow
Mactec54
Mactec54