I have been testing a resolver feedback couple of days now for Argon and it seems promising already! It’s working very well in the prototype code and it provides position resolution of 8192 counts per revolution.

As resolver is analog sensor, it’s sensitive to noise sources such as unshielded motor leads but this doesn’t seem to be huge problem. Motor will make some hissing sound but otherwise it “feels” just like encoder. However unlike incremental encoders, resolver is absolute position sensor (meaning that the instantly drive knows absolute motor angle, not just the amount turned from the beginning of measure). The benefit of this is elimination of the need of Hall sensors and/or phasing during drive power-on initialization.