I am using a MultiCam 3000 router. A couple of times now, when we go to run a job the spindle will not turn. If we tell the spindle to spin at 6000 rpm, it sounds like it is turning, but the spindle turns very slowly or not at all. We then can grab the spindle and spin it a couple of times and then it will pick up speed and then turn 6000 rpm.
The problem is interminant. It is not constant.
I took out the VFD and had it check at the local distrubitor. They say it works great. I put the VFD back. I checked the voltage, at full power the VFD was 220 volts. At the machine where spindle is all I got was 180 volts. All electrical connections at the spindle are tight.
Is there another test I can perform to fix this problem.