Dave Caroline wrote: > if the encoder is on the motor there will be a small hysteresis to the > movement due to the friction. > if on the screw then I can see a small effect on the loop as the servo > will move and not the screw. > can you rotate 90 degrees and hang the motor below. > I put the encoders on the ballscrew, and have had no problem with it. I do tension the belt VERY tightly to eliminate any "flapping", and the belt is quite short, the shafts are about 3" apart.
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