@jjem said in RRF 3.5beta2/closed-loop encoder config-problems:
Is there scope for doing linear encoding (with the Renishaw LM10, for example) without also having the magnetic shaft encoder?
No. We need the magnetic encoder so that we can set the coil currents the desired angle ahead or behind the current step phase position to reasonable accuracy. In effect we are treating the stepper motor like a BLDC motor with a very high number of poles. BLDC motors that can operate over a wide range of speeds in either direction have built-in sensors for commutation.
OTOH it may in future be possible to run the stepper motor in open loop mode and use the linear encoder to monitor deviation between commanded and actual position.
Our magnetic encoder board takes up about 15mm of depth on the back of the stepper motor, including the connector.