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Controlling Slicer Temperature G-Code Order (Simple Method)

The method shown in the 📄"Passing Slicer Variables to PRINT_START" instructions is generally the preferable way to set it up, as it allows you the most control, but it is more complex.

If your slicer is putting heating g-codes AFTER PRINT_START and you want them to happen before (or the inverse, or you want to split it), this would be a simpler way to control the ordering. This method only allows you to send temperature g-codes before or after PRINT_START.

To force the g-code ordering, place any of the following g-codes from the following lists in your start gcode where you desire:

Prusa Slicer / SuperSlicer

  • M140 S[first_layer_bed_temperature] ; set bed temp
  • M190 S[first_layer_bed_temperature] ; wait for bed
  • M104 S{first_layer_temperature[initial_extruder]+extruder_temperature_offset[initial_extruder]} ; set hotend temp
  • M109 S{first_layer_temperature[initial_extruder]+extruder_temperature_offset[initial_extruder]} ; wait for hotend

Cura

  • M140 S{material_bed_temperature_layer_0} ; set bed temp
  • M190 S{material_bed_temperature_layer_0} ; wait for bed
  • M104 S{material_print_temperature_layer_0} ; set hotend temp
  • M109 S{material_print_temperature_layer_0} ; wait for hotend

Warnings

  • These are just lists of available commands, they don't have to be in this order, nor do you have to use all of them. Place them as you like.
  • Each bullet point is only ONE line. Do not split them into multiple lines.
  • There are many other variables available in each slicer, and you can pass whatever variables you like to whatever g-codes you like. The available variables are not always documented.

Example

Forces both bed and hotend to heat up fully before executing PRINT_START (SS):

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