Reset focuser position to zero?

Somehow the position of my stepper focuser as shown in SGP is out of sync with the actual position of the focuser. ie it is not zero when the focuser if fully racked in. Autofocus is working fine, but the position reported is not where it should be.

I can’t for the life of me see how to reset it in SGP. I can manually rack it in all the way, but how to reset the position to zero when there?


On any focuser, being racked in does not mean that you are at “zero”. Some ASCOM drivers let you reset your current physical position to zero some don’t. If yours does not, you will need to disconnect the focus motor from the controller (assuming the focuser is fully racked in), and then set the controller to 0. The reconnect the focus motor.