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Still working on this, new panel. New dual worm drives for the A axis, zero backlash. Currently working on a new PM940 input shaft for a bluemax 1hp motor. I also received two more PM940's to...

I am working on a 5 axis PM940 based around a 12" bridgeport rotary table for the c axis and some wheel hub bearings for the a axis. The large Z travel of the 940 and wide table makes this setup...

Mactec54, maybe it is not clear from the pictures, the screw that the green wire is connected to on the outside screws directly into the 5 terminal bus through the electronics box wall. Thanks for...

All the present grounds are connected to the 5 hole bus, which is to say only the earth ground from the power cable going back to the electrical panel is present. The spindle does not have any...

Yeah, wonder if your control box has a painted interior. I am also wondering if maybe some wiring is missing in my PM. It seems odd to add a five hole block just to screw one wire to the control...

I disconnected the steppers and put the control box back together. Everything works fine, so the problem is in the steppers, cabling, or stepper drive wiring.

However, the grounding was bad as...

The CNCKit is just aluminum motor mounts. I added 4 stepper motors each which have 4 wires. those are connected with 4 conductor shielded cable to a grounded metal box which contains the 4 stepper...

photos of said machine
http://www.precisionmatthews.com/shop/pm-25mv/

I have a PM-25 that I have added a CNC kit to. Over the steppers I screwed on some galvanized sheet metal as a cover (into the mount, not the motor). I was touching the sheet metal over one stepper...