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JohnKray

Multi-Material Temperature Issue

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Posted · Multi-Material Temperature Issue

I'm configuring Cura for a new 3D printer my company is developing. The printer has a 3 material set up, which loads and unloads the 3 materials into one hotend. Very similar to the Prusa MMU2.0. 

 

My issue is that Cura is adding a M104 command for T2 at the beginning of the print after the start gcode. This is problematic as printing starts with T0, but since the temperature has been changed for T2 and all tools use the same heater, T0 is now printing with the T2 temperature. 

 

Hopefully, that makes sense. I have pasted the beginning of my exported gcode to show the issue, the problematic line is in bold. Let me know if I need to clarify anything

 

 

;FLAVOR:RepRap
;TIME:9255
;Filament used: 10.3649m, 0m, 1.6333m
;Layer height: 0.2
;Generated with Cura_SteamEngine 3.5.1
T0
M82 ;absolute extrusion mode
M98 P/sys/messageprintstart.g
M104 S245 T0 ; set extruder temp
M140 S85 ; set bed temp
G32 ; home xy
M190 S85 ; wait for bed temp
M104 S245 T0; wait for extruder temp
M98 P/sys/homeu.g
G1 X-13 Y0 F6000 ; Position Tool Head for filament change
M83
G1 U0 F2000 ; Position filament selector for bay 1
M98 P/sys/filamentload1.g
M83
M83 ;relative extrusion mode
G1 F2100 E-0.8
;LAYER_COUNT:282
;LAYER:0
M107
M104 T2 S230
G0 F15000 X91.387 Y85.954 Z0.25
;TYPE:WALL-INNER
G1 F2100 E0.80665
G1 F2400 X91.461 Y85.936 E0.00285
G1 X91.738 Y85.866 E0.01069
G1 X91.909 Y85.822 E0.00661
G1 X91.967 Y85.854 E0.00248
G1 X91.954 Y85.867
G1 X91.781 Y86.036 E0.00398
G1 X91.591 Y86.196 E0.00586
G1 X91.538 Y86.24 E0.00258

 

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