New PM1440GT & WJ200 VFD

[mksj]

E07.2
E07 Over voltage error
0.2 while de-accelerating

OK if wires cross just do not run them in parallel. In general it is not an issue, but it is good practice and I have seen some electrical interference causing problems (electrical noise) in other components. Also, shield grounding varies for different cables, low voltage the shield is only grounded at the VFD end, motor cable at both ends. I have only seen false signaling issues when people ran both motor and control wires in the same conduit. You can also see some noise in the speed pot, but I program it to ignore small scale deviations.

 

[Scott-ak]

It's up and running. The spindle start up is slow and cogs alittle when the lead screw is being driven. Slower than when I was just powering the motor from the vfd with the run button. I guess I need to tune the parameters a little.

 

[mksj]

Not sure why, but the stock 1440GT motor seems to COG a bit on start-up and may be more noticeable when the drive train is engaged. Run the VFD Auto-Tune with motion H001=02 with the motor belt removed. After it is run you must program the VFD to use the new motor constants by setting H002=02. Also you can shorten the acceleration times F002 and A092 = to 2-3 seconds which should help, and I use linear acceleration slope A097 = 00 (default is S curve), deceleration should also be set to linear A098 = 00. You must use a braking resistor to get stopping times less than 3 seconds from speed. In addition braking and acceleration times only set the slope (angle) of the curve. So if you have say 3 second braking with a maximum Hz = 90, if you set the Hz to 45 you should see 1.5 second braking. So if you are threading and want quick stopping, I recommend setting the VFD to the 20-30Hz range and set the headstock gearbox to get the desired spindle RPM range.