I have a Denford Cyclone which I'm running from a 10kW 3 Phase Converter. The rating plate on the machine is 27HP (roughly 20kW)
It works pretty well - except when you spin up the spindle too fast.
It will run up to 1500 from 0 in one step without a problem but if you say go from 0 to 2000, it trips out due to the mains voltage dipping.
You can start from 1500 and increase it gradually in steps of 200 RPM up to 5000 RPM - and it stays happy, even when cutting.
The spindle acceleration is very fast - a fraction of a second to reach 1500.
Is there a parameter which will reduce the acceleration? I've looked through the parameter manual and the only two that stand out are
0110 - Delay Timer to check the spindle speed arrival signal
0584 - Spindle loop gain
0110 is set to 255
0584 is set to 75
Most sources I've found say not to adjust the loop gain. I'm not convinced the issue is that it checks the spindle arrival - and it hasn't. Often the machine completely shuts down if you spin-up too fast requiring a power cycle.
What would you recommend?
I can't fit a higher power Phase Converter as the mains supply to my Workshop is only 50A @ 230V ~ 11.5kW and I'm not keen to blow the main fuse.
Thanks in advance,
Si