Thor, or should that be Zeus?

[Davek0974]

Yes it needs a little current on a normal switch, i think gold flashed ones will be listed as suitable for logic levels or PLC inputs, sometimes have a very low max current as well, unlike the usual power switches.

With servos, we have index homing so accuracy in the switch is not needed - it works really well and insanely repeatable. On steppers as you said, damage is unlikely but the torque from a servo is frightening. :)

[Desertboy]

Microswictches can be very very accurate

http://www.baumer.com/us-en/products...ical-switches/

Accuracy is 70 times thinner than a human hair ;) For me though that level of precision is not needed lol but maybe one day.

Neale have you ever had a problem with stray chips triggering the sensors? I assume your using inductive not capacitive sensors.