Cncst4060

[JAZZCNC]

P024 is listed in your manual as overcurrent protection buffer - default 3 seconds, link sets to 6 - I'd recover that to 3 to be honest, at least for now. The spindle should get to speed within that time and the current should be stable. Reducing from 6 to 3 may INCREASE the frequency of overcurrent trips, but will protect the VFD/spindle. If




P034 controls the spindle acceleration - the manual claims a default of 50Hz/S (takes 8 seconds to get to 400Hz - max RPM) - your value of 25 will take 16 seconds - very slow to accelerate. Ironically, an online version of the manual says default should be 25Hz/S (so your VFD defaults appear to be consistent with the online manual, not the manual provided - go figure!). P042 is the deceleration - similar. That parameter should not have been changed from the other link - so I assume the value 25 is the default and the manual is wrong? Jazz suggested slowing down the acceleration... I'm cautious - it's already chuffing slow. Worth playing around with, though - try the manual setting of 50 will either improve, or worsen your experience - try it - it shouldn't break anything. Remember to recover to 25 if 50 worsens things. You could try 20, or 15... but it will have a detrimental impact on spindle accel time.

8 seconds is about the right amount of time to accelrate to 400hz. So if it's not working with 16s then it will only get worse.
What's causing it I've no idea and I can't read that manual very well because the pictures are crap.!