If your engine no longer responds to PWM after a main board update, re-calibrate the laser frequency:
The Sapphire Pro has a direct-drive extruder, making it great for bed leveling. Updated firmware enables Unified Bed Leveling (UBL) or improved Auto-Leveling algorithms, which compensate for the glass bed's slight imperfections much better than the stock "bilinear" leveling. two trees sapphire pro firmware upd
mks_config.txt (Configuration file for screen and motor settings). mks_pic (Folder containing UI icons). mks_font (Folder containing UI text fonts). 3. Flashing the Board Power off the printer. If your engine no longer responds to PWM
To update the firmware on a Two Trees Sapphire Pro , you typically copy a compiled .bin file to a formatted SD card and restart the printer. The motherboard (usually an MKS Robin Nano) automatically detects and flashes the new file on boot. 🛠️ Update Procedure mks_pic (Folder containing UI icons)
