Double filament extrusor on my flsun q5
I started this project as a hobbie more than a necessity. I have an old flsun q5 but i think this should work in any flsun printer with more than 1 extrusor exit.
I wanted that my flsun q5 had at least two colors instead of one. I thought that it would be easy with an external arduino but i saw that the mks robin nano had two exits for extruders. I had to modify and install marlin but it was mostly only download the settings from the marlin web and modify the number of extrusors from 1 to two.
I installed a second extrusor printing some parts and now i have two motors for extruders. I joint the two motors with a ptfe tube to the hotend with a printed piece in a Y form. Then i programed the slicer to when it changes filaments:
pull the filament to before the junction
push the second filament to the hotend
purge the filament.
And it continue printing. I had to disable the multi extrusion parameters on prusaslicer and do my own initial and end filament gcode. It works pretty well.
I had to do some improvements for example i dont have a cutter blade to cut the end of the filament and sometimes it is a bit difficult to push and pull from the Y piece, so i reduced de speed while it passes through that part.
Any thowghts of improvement?
Now i'm thinking to do my own mmu3.