Here is my start gcode, just wondering if G21, G90, M82 are actually needed and that they do exactly ? Hi, thanks for the response. I realise that I can create my own start code in Cura but Cura inserts its own start code prior to the the user define... Cura Start gcode und eng gcode dauerhaft ändern... I don't know. Have you tried editing the gcode file and removing M104 to see what happens? You need to edit the .json file to stop it from adding b... Removing the M104 has no effect, at least on my machine. Could you point me to the location of the .json file that needs to be modified to to stop... The M104 maybe there for dual extruder machines. Seb84 G92 E0. = "Filament-Tacho" auf 0 setzen, 3mm Material extrudieren mit 200mm/Minute, Filament-Tacho wieder auf 0 setzen. Der Drucker führt dann … 1. Prusa Slicer Gcode geändert? - Prusa3D Forum Changing Cura generated start code - Ultimaker Cura - Ultimaker ... Because in the generated G-code it is present: a piece of code from the head of the file: G1 Z5.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start position G1 …