FLSun QQ-S Pro Flying Extruder

thingiverse

A remix of the great flying extruder mod for the FLSun QQ-S Pro. Having only used this for 8 continuous hours of printing, my experience is limited however there are some instant observations I can provide: GOOD: Much quieter retractions. Such an annoying sound, gone. Only have to set retractions to 2mm for good results with PETG at 235c. Better extrusion consistency. Flexible filament capability (untested but common sense dictates it should work without an issue, other users have reported success with flexibles on this mod too). Well designed and simple, does exactly what you would expect. Looks great BAD: Extra weight on moving assembly, potential bending of rods. The extruder isn't light. I've tried to slightly offset this by having my PTFE tube a bit longer than needs be, this helps it provide some support by pushing against the hot end and by proxy the effector. This could lower print quality at high speeds but there's been no noticeable difference. Potential unforeseen long term damage to printer, only time will tell. Personally, the lack of retraction sound alone makes this worth it, the improved capability is the cherry on top for me. I've reduced the thickness of the centre piece and also reduced the depth of the screw holes to allow for reusing the extruder screws that came with the printer. You might have to scale down the model to 10% in your slicer as my fusion360 seems to inflate everything by a scale of 10??? The holder pieces have been modified as the provided ones weren't compatible with the "rails" on the pro version, not sure if this is universal as I don't have other qq-s' to check. The holder comes in 4 versions: V1: If the screws that hold on the rail covers don't obstruct the given rail from hitting the limit switch, use this. V1_screwLeft: If the screw on the left-hand side obstructs the rail from hitting the limit switch. V1_screwRight: If the screw on the right-hand side obstructs the rail from hitting the limit switch. v1_both: If both screws cause an obstruction. You can reuse the included PTFE tubing from the bowden setup however I've opted to use a short length of capricorn tubing I had lying around. In regards to length of each connection from holder to centre, I used trial and error to place the extruder at a height which doesn't obstruct the main hotend cable from either the highest position to the lowest.