Rotary encoder FAIL
June 14th, 2009
The encoders gave excellent readings for about 1/2 the range of travel. Unfortunately, as the stage nears about 3/4 the way to the end of its range, the lateral play in the drive screw becomes progressively worse, causing the encoders to go severely out of alignment. Perhaps the way I should have gone all along is with the linear encoding strips- at least detecting and correcting backlash will be a simple matter now. All I have to do is figure a robust way to mount the strips and adapt the sensors.