You will need the and the specific .hex firmware file for the
Wrong step angle or microstepping settings. Fix: Send $100=80 (X steps/mm), $101=80 (Y steps/mm) for standard S9 belts. If your machine is an S9 Pro with finer belts, use $100=160 . Test by moving 100mm in Lightburn – measure actual travel. sculpfun s9 firmware update