1 ABSOLUTE_POSITIONING = ('G90', 'Absolute positioning')
2 UNITS_IN_MILLIMETERS = ('G21', 'Millimeter units')
3 START_AT_HOME = ('G28', 'Start at home')
4 RESET_EXTRUDER_DISTANCE = ('G92', 'Reset extruder distance')
5 LINEAR_GCODE_MOVEMENT = ('G1', 'Linear Gcode movement')
6 TURN_EXTRUDER_ON = ('M101', 'Turn extruder on')
7 TURN_EXTRUDER_OFF = ('M103', 'Turn extruder off')
8 ABSOLUTE_EXTRUSION_DISTANCE = ('M82', 'Absolute extrusion distance')
9 RELATIVE_EXTRUSION_DISTANCE = ('M83', 'Relative extrusion distance')
10 TURN_FAN_ON = ('M106', 'Turn fan on')
11 TURN_FAN_OFF = ('M107', 'Turn fan off')
12