Hi,

Is there any theoretical reason or practical limitation to stop you using DROs to provide position feedback to a CNC controller? Even better if they're absolute DROs so that the DRO can provide limit handling and there's no need for homing?

It seems to me that this technique would mostly remove any problems with backlash and missed steps - whereas 'closed-loop' steppers and servos address the missed steps problem but not backlash.

Of course it would require a controller build to accept DRO input for feedback. Does anything like that exist already? Am I missing something here?

Alan