@bearer because a full step is a known position in the motor, whereas with the swith you rely on the repeatability of the switch.

I'm wondering about the homing sequence in the duet wifi. I work on industrial cnc machines, and on those machines the limit swith tells the control to start searching for the zero pulse on the encoder, which is much more accurate.

Could something similar be implemented on the Duet? Advance the stepper until it hits the switch, then back off to the nearest full step of the stepper motor, which will always be in the same spot.

So I'm wondering if that is how the homing works, or could it be implemented.