Tool Setter Block Grounding

[bryan]

I have a tool setter block setup and currently use an alligator clip for the grounding. I have noticed in Peter's video that the grounding is done through the CNC frame, eliminating the need to remember to connect the alligator clip on the spindle cutter and the dragging of a cable on the deck. For this to work, power needs to pass through the spindle bearings to the cutter. Can power passing through the bearings cause pitting of the bearings or are the voltages and amps too low to cause damage? Does anyone have any thoughts on this issue before I eliminate the alligator clip grounding?

Bryan

 

[cncnutz]

Hi Bryan,

If you are passing enough current through your bearings to cause pitting, the last thing you need to worry about is the bearings.
Seriously the current is far, far too small cause even the possibility of needing to think about pitting.
Just check you don't have ceramic bearings as they are non conductive so won't work.
I just updated my spindle to one with ceramic bearings and now need to update my probing and touch off setup.

Cheers Peter

 

[bryan]

Thank's for the feedback Peter. Your video on setting up a VFD was excellent and made the setup process less stressful.

Bryan