Dual Extruder, I want to print on the second extruder but the tool never gets called up

[Erosion139 0]

Hello, I have been battling this issue for a few days. 

I am running two Raise3D Pro2's and have successfully gotten it to work with Cura for using a main material on T0 and support materials on T1. But I am now stuck on the problem of me wanting to print with only the second nozzle (T0.) Inside the machine settings under start Gcode one of the last lines calls T0 before the main code gets going, but in the main code there is never a check to see which tool is desired to be used. So it just starts printing with T0, I dont know why Cura isnt injecting a tool request so that the machine switches to the correct nozzle. Every time I go about printing primarily on the second extruder there is always something that doesn't work quite right. I don't know what I am missing, the objects are selected on extruder 2, I disabled extruder 1 but that doesn't work either. Anyone familiar with dual extruders help is much appreciated! 

Edited January 6, 2023 by Erosion139

[GregValiant 1,492]

Within the gcode file - does Cura add a call for T1 prior to your startup gcode?  It should be there, but then your StartUp Gcode is explicitly calling for T0.

 

You could try changing that "T0" line in your StartUp Gcode to "T{initial_extruder_nr}" and see if it makes a difference.

[Erosion139 0]

2 hours ago, GregValiant said:

Within the gcode file - does Cura add a call for T1 prior to your startup gcode?  It should be there, but then your StartUp Gcode is explicitly calling for T0.

 

You could try changing that "T0" line in your StartUp Gcode to "T{initial_extruder_nr}" and see if it makes a difference.

I believe this was it! In Gcode that start command was replaced by T1, so Cura definitely adjusted the parameter accordingly! Thanks!