First layer calibration GCODE for Prusa printers, as implemented in Prusa MK3/MK3S Firmware (https://github.com/prusa3d/Prusa-Firmware), originally created by Marek Bel.
This pattern draws a meander, ending with a small square at the end.
Available GCODE files for different filaments:
* PLA (215°C/60°C)
* PET (230°C/85°C)
* ABS (255°C/100°C)
To define your custom temperatures, edit lines 6, 7, 8 and 9 of the gcode file:
M104 Sxxx; set hotend temp to xxx
M140 Syyy; set bed temp to yyy
M190 Syyy; wait bed temp
M109 Sxxx; wait hotend temp
IMPORTANT NOTE: Do not slice the enclosed STL file, which is here just for illustration - just use enclosed GCODE files.