Originally Posted by
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
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