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[Ultimaker Original Dual Extrusion] Extruder 1 doesn't extrude during prints

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Posted · [Ultimaker Original Dual Extrusion] Extruder 1 doesn't extrude during prints

Hey everyone,


i recently got a used UMO dual extrusion for cheap and took it as an opportunity to get into 3D printing, so i'm still quite new to the whole topic. So far it was a bumpy road, but i got most things to work. Currently i'm trying to print with the second extruder, later on i want to try printing using both extruders, but currently i just want to be able to print in different colors without the need of swapping the filament. The problem is that as soon as the print starts the extruder will just not move anymore, i can extract filament via the Terminal and also using Octoprints Control UI, it will also execute the extrusion and retraction at the very beginning of the print, but as soon as it should start printing the extruder won't move at all anymore. I also think i know what the Problem is, i took a look at the GCODE (see below) and found that after the gcode switches to Tool 0 (in line 6) it doesn't switch back to Tool 1 ever.

Even if i disable Extruder 1 in Cura completely it'll still swap to Extruder 1 in the gcode and not swap back. So i guess my question is, is there any way to fix this? Is it even possible printing only with Extruder 2?


Cheers and thx for the help in advance ✌️

[...] # startups

T1 ;Switch to the 2nd extruder
G92 E0 ;zero the extruded length
G1 F200 E6 ;extrude 6 mm of feed stock
G92 E0 ;zero the extruded length again
G1 F200 E-16
T0 ;Switch to the 1st extruder
G92 E0 ;zero the extruded length
G1 F200 E6 ;extrude 6 mm of feed stock
G92 E0 ;zero the extruded length again
G1 F9000
;Put printing message on LCD screen
M117 Printing...
G92 E0
G92 E0
G1 F1500 E-6.5
M104 T1 S200
G0 F3600 X65.166 Y55.881 Z0.3
M104 S185
G1 F1500 E0
G1 F1800 X65.554 Y55.473 E0.01059
G1 X65.879 Y55.171 E0.01894

[...] # rest of the print


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