Adaptive Backlash Reduction (well... almost)

[Workshopshed]

Hi Rick,
an interesting idea and definitely worth investigating. I'd be concerned that dirt and other containments on the screw might affect the reliability.

I've seen variations on this using a digital readout to get the absolute position of the moving parts. You might also be able to look at the current flowing through the motor, with a low load that could be less than when the motor is actually moving the parts.

Also perhaps a load sensor in the thrust bearings of the lead screw might work?

Good luck with your experiments.

Andy