RE: Stepper Motor Upgrades to Eliminate VFA's (Vertical Fine Artifacts)
Further update: I reworked the port to allow for runtime stepper changes. Now you do not need to recompile the FW if you want to change stepper or adjust chopper config. Also - no need to erase EEPROM when switching to/from this custom FW as long as you follow some basic rules (do not use stock FW newer than 3.14.1). Tested on MK404 and MK3S with stock steppers. Should support even the original MK3. I removed support for geared extruders and thermistors, as it made the code more difficult to read and I am not sure how relevant these changes still are in 2025. Also - I had to drop MMU support as the implementation changed drastically and I was unable to port the changes reliably.
Feel free to use the pre-build binary from here: https://github.com/pvyleta/Prusa-Firmware/releases/tag/v3.14.1_0.9_degree_steppers