Machine G-Code

Start G-Code

Parameter: machine_start_gcode
Description: G-code executed before printing begins. Typically includes homing, bed leveling, heating, and purge line.

Common Start G-Code Commands

G28 ; Home all axes
G29 ; Auto bed leveling (if enabled)
M140 S{first_layer_bed_temperature[0]} ; Set bed temp
M190 S{first_layer_bed_temperature[0]} ; Wait for bed temp
M104 S{first_layer_temperature[0]} ; Set nozzle temp
M109 S{first_layer_temperature[0]} ; Wait for nozzle temp
G92 E0 ; Reset extruder
G1 Z2.0 F3000 ; Move Z up
G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start
G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; Purge line
G1 X0.4 Y200.0 Z0.3 F5000.0 ; Move over
G1 X0.4 Y20 Z0.3 F1500.0 E30 ; Second purge line
G92 E0 ; Reset extruder

End G-Code

Parameter: machine_end_gcode
Description: G-code executed after printing completes. Typically includes retraction, cooling, and presenting the part.

Common End G-Code Commands

G91 ; Relative positioning
G1 E-2 F2700 ; Retract filament
G1 Z10 F3000 ; Raise Z
G90 ; Absolute positioning
G1 X0 Y220 F6000 ; Present print
M104 S0 ; Turn off hotend
M140 S0 ; Turn off bed
M84 ; Disable motors
M107 ; Turn off fan

Before Layer Change G-Code

Parameter: before_layer_change_gcode
Description: Executed before each layer change. Useful for timelapse triggers or custom actions.

After Layer Change G-Code

Parameter: layer_change_gcode
Description: Executed after each layer change.

Tool Change G-Code

Parameter: change_filament_gcode
Description: G-code for filament/tool changes in multi-material printing.

Pause Print G-Code

Parameter: machine_pause_gcode
Description: G-code executed when print is paused (for color changes, etc.).

Available Placeholders

You can use these placeholders in your G-code, which will be replaced with actual values:

Placeholder	Description
`{first_layer_temperature}`	First layer nozzle temperature
`{first_layer_bed_temperature}`	First layer bed temperature
`{layer_z}`	Current layer Z height
`{layer_num}`	Current layer number
`{total_layer_count}`	Total number of layers
`{filament_type}`	Type of filament (PLA, PETG, etc.)

Warning: Incorrect G-code can damage your printer. Always backup working configurations before making changes.