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  1. Hello, I do not own an Ultimaker printer but have adopted Cura as my preferred slicer because it is so awesome. Sorry if that is bad and happy to donate for using it. Anyway, it has been a long driving goal of mine to print a 3D Benchy boat in color. Until now, the only Slicer I know of that is able to work with mixing extruders and virtual tools is Slic3r. Unfortunately, Slic3r cannot assemble the 3D Bency model correctly and I have not been able to achieve my goal. Enter Cura 2.6.0 beta. At last! 3D Bency parts are able to be opened, selected and merged correctly! Yea! Will I finally be able to print a color Benchy? Will my life finally be complete? I configure up to 8 extruders in Cura, even assigned the appropriate color from the color pallet, on each extruder under start code I add the command to change to the virtual tool - t0, t1, t2, t3, etc. I select each part, assign an extruder (tool) to that part, fuss with prime tower settings to remove errors on prime tower. Cool! I export the Gcode..... Upload it to the Duet, hit print and wait. The result was not pretty. All three extruder motors spun crazy, jamming filament in the nozzle, excessive grinding, then retracting a huge amount, pushing it back in, more extruder spinning, molten filament everywhere, look out! lol cancel, abort, stop, unplug ! haha So, I back up a bit and try slicing a single color object with Cura and the result is exactly the same. I back up once more to Cura 15.04.06 or whatever it was, and got the same result again. My start G codes must be messed up, but they are the same as in Slic3r. I will go back and retest a single object from Slic3r to ensure my start Gcodes are good. My comments/question is does Cura look to support mixing extruders using virtual tools? The virtual tools are configured in firmware and contain mixing ratios of the three inputs. For example, T4 could be a mix of the three colors producing a specific color. T5 a different mix, etc. We can also change mixing ratios on the fly of the existing tool. Just different ways of handling it. Thank you for reading.
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