U20_Pro and U30_Pro 3D SCREEN Firmware, Also aplicable to LK4 Pro and LK5 Pro.
Polamento added new changes in 2020 to enhance Marlin 1.1.9 in this printers, bringing new functions.
Added the following functions:
- Mesh bed leveling
- Calibrate extruder steps by screen
- Translation to Spanish
You MUST also install the firmware: https://github.com/Polamento/Marlin-MR1-2022