I am getting several inconsistent problems with the Z-Axis on my router:
1. MOST OF THE TIME...... when "referencing all home" Z motor judders/excessive noise and will not home (I have to press RESET in fear of burning the motor out).
2. OCCASIONALLY...... Z will home and zero.
3. Pressing -Z on the flyout MPG moves the spindle BOTH UP & DOWN (seems to randomly go up or down midd travel). +Z does the same. Also, when hitting -Z (up spindle) jog repeatedly, the spindle bounces off home and then goes back down all the way to the table. The DRO does not zero out and I get a wrong reading (kind of adds the up travel to the down travel when it bounces off home....sometimes positive sometimes negative). I have rewound the screw by hand back to the home switch and zeroed the axis in Mach, but it does not stick for long. i cannot set cutter on the work with any confidence as the reading is wrong everytime.
Anybody got any pointers? All this has just cropped up and no config has been changed. I am using smoothsteppers.