Dual extrusion and nozzle heating?

[TheBum]

When doing dual extrusion, is there any way to make the initially idle extruder only warm up to the standby temperature instead of heating to printing temperature and then cooling down once the print actually starts?

[S3D-Jason]

Many machines do some kind of leveling, calibration, or purge routine at the start where you need both nozzles at full temp. If you really want to have to lower, you should carefully check your starting script to make sure the second nozzle isn't involved in the startup sequence. Then you can just add something like this:

M104 S[extruder1_temperature] T1 ; set T1 to normal temp
M109 S100 T1 ; set T1 to a lower temperature right away so it doesn't heat fully

[TheBum]

The problem with using a script is different models will start printing with different nozzles, so the script may need to be adapted for every object. It's just another manual step that has the potential to ruin a print if forgotten.