README.md

U20_Pro and U30_Pro 3D Printer Firmware, Also aplicable to LK4 Pro and LK5 Pro.

Marlin1.1.9 LGT0.3.x

This firmware was first modified by Longer3D, based on Marlin 1.1.9 and applied to U20_Pro and U30_Pro. Marlin1.1.9 LGT0.3.X supports the U30 Pro / LK4 Pro printer by default. If you are using U20 Pro / LK5 Pro, you need unremark "U20_Pro" in Configuration.h.

Marlin-MR1-2022

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 screen software:

https://github.com/Polamento/dwin-MR1