Problem with Spindle not spinning

[routercnc]

When the spindle is off can you spin the collet/shaft freely by hand? Sounds like the bearings could have bound up?

I know when I have a clogged cutter which stalls in the work the motor coils can still make a sound like they are spinning up, even though the cutter is not moving. Freeing the cutter sorts it out.

Also worth removing the plug on top of the spindle and checking continuity between different pins on the spindle side (windings). Should be a couple of ohms across a winding, not a dead short, for example.

[Clive S]

Ok first can you move the collet freely ie does it rotate without power if so then remove the cable from the VFD and check with a Ohm meter what the resistance is between each pair of the three wires going to the spindle.

It sounds to me you might have a bad soldered joint in the plug but check from the VFD end before you remove the plug.


The spindle would make a noise and not spin if one of the wires was disconnected BUT be carful as you could destroy the VFD.