Hall effect proximity sensors

[cropwell]

I was only able to conclude the need for manual focus :D

I am sorry that my camcorder was too close (AND TOO CHEAP) to sharply define the image. However, I do believe that the definition was enough to allow you to observe that the stop point of the stepper was within a few degrees. In fact, I thought that it probably stopped at the same point and a stepper motor, when energised by hold current, would settle at the same point on the step. My crude test would probably indicate +/- 1.8 deg and if you regard it as valuable, you may like to repeat the experiment with more accurate indication of the angle that the stepper motor settles on.

I am interested in knowing more about hold points and microstepping, but even if the homing point is one full step either way, then on a 5mm pitch screw you have a positional error of +/-0.025mm, which is good enough for woodwork.