speed shown on VFD display does not match that set on UCCNC.
- UCCNC set to 6,000 RPM - VFD Display fluctuates constantly from 10,300 up to 10,900 then down. ( Analog voltage on board 2.62V)
- UCCNC set to 12,000 RPM - VFD Display fluctuates constantly from 14,200 up to 15,200 then down. ( Analog voltage on board 4.87V)
- UCCNC set to 24,000 RPM - VFD Display without fluctuation 22,812 ( Analog voltage on board 9.33V)
The 10V supply from the VDF reads out 9.97V at the controller board (UB1), so did a little experiment and provided 10.2V by independent PS. This didn't really helped.
- UCCNC set to 24,000 RPM - VFD Display without fluctuation 23,028 ( Analog voltage on board 9.46V)
The VFD I have is HY02D223B coupled to a 400Hz spindle 220v - 2.2W water cooled.
PD settings on the VFD:
Jumper set on connection 1 & 2 for remote terminal control
PD001 1 PD002 1 PD003 400 PD004 400 PD005 400 PD007 20 PD008 220 PD009 15 PD010 11 PD011 100 PD014 10 PD015 10 PD041 8 PD052 1 PD070 0 PD072 400 PD073 100 PD120 100 PD141 220 PD142 9 PD143 2 PD144 3000
What could be causing this variation in speeds?
Thanks in advance!