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check if the bowden tube is pushed down to the very end of the throat (it must be evenly cut),
conduct a test in which you will use the black filament in both extruders
and then another white one.
For easy control, draw a line at equal intervals on each filament.
I can guess that the filament used is causing problems.
Your test will show if I am right.
On the forum I help to use the rod, I don't give fish. Geeetech Prusa I3 M201 Dual extruder Mixcolor 3D printer,bought 2017-12-19, already built, in the cognitive and improvement phase Geeetech filament, ABS only Geeetech 3D WiFi Module for 3D Printer, bought 2018-04-15, He got a new life, and still lies in a drawer. Positively frenzied customer of Getech Technology.
