== Automatic G-Code Added Before#REDIRECT [[Settings/After Start G-Code == MatterSlice adds certain automatically generated code before and after your custom start G-Code. This normally where your temperature settings would be applied. MatterSlice will wait for the bed to warm up first. Then begin warming the extruder, run your custom start G-Code, then wait for the extruder to finish heating. If MatterSlice detects that you have any extruder heating commands (<code>M104<Printer/code>, <code>M109</code>) in your custom start Custom G-Code, it will remove these from the automatic G-Code. Likewise for bed heating commands (<code>M140</code>, <code>M190</code>). Here are some examples of the automatic Start G-Code: Before: ; automatic settings before start_gcode G21 ; set units to millimeters M107 ; fan off M190 S95 ; wait for bed temperature to be reached M104 T0 S210 ; start heating extruder 1 T0 ; set the active extruder to 0 After: ; automatic settings after start_gcode M109 T0 S210 ; wait for extruder 1 to reach temperature T0 ; set the active extruder to 0 G90 ; use absolute coordinates G92 E0 ; reset the expected extruder position M82 ; use absolute distance for extrusion == Variables == MatterSlice allows you to place certain tokens in your custom GCode that will automatically be replaced with the appropriate values. Here is an example: <code>M109 S[temperature]</code> In this line, <code>[temperature]</code> will be replaced with the extruder temperature defined in your slice settings. These tokens can be enclosed in either square brackets <code>[]</code> or curly brackets <code>{}</code>, but for compatibility with other slicers we recommend square brackets. Here is the list of currently available tokens: ::<tt>temperature</tt><br>::<tt>bed_temperature</tt><br>::<tt>bed_remove_part_temperature</tt><br>::<tt>extruder_wipe_temperature</tt><br>::<tt>z_offset</tt><br>::<tt>retract_length</tt><br>::<tt>filament_diameter</tt><br>::<tt>first_layer_speed</tt><br>::<tt>infill_speed</tt><br>::<tt>max_fan_speed</tt><br>::<tt>min_fan_speed</tt><br>::<tt>min_print_speed</tt><br>::<tt>perimeter_speed</tt><br>::<tt>retract_speed</tt><br>::<tt>support_material_speed</tt><br>::<tt>travel_speed</tt><br>::<tt>bridge_fan_speed</tt><br>::<tt>bridge_speed</tt><br>::<tt>raft_print_speed</tt><br>::<tt>external_perimeter_speed</tt><br> [[Category:Slice Settings]][[Category:Incomplete]]