Some prints with Tronxy X5S. I took the experimental PTFE-splitter thing apart and opened some of the junctions as the filament feed was bit restricted at points and printed some stuff to test how it works. I'm doing 2-color prints at the moment with different extruders to see how they work.
A Ghostbusters logo and a dual color vase in PLA. The simple logo turned out great, even though the model from thingiverse has an unneeded gap so the white and red isn't connected in all places it should. But for this model doesn't matter, it'll hold together well enough.
The vase has obvious problem with retraction, even though I calibrated it before doing this print. The stringiness is probably caused by 2 things:
- bit too low retract (4.8mm with Pressure Advance value 0.6)
- over-extrusion caused by too much perimeter/infill overlap I've had on my KISS profile for a while. My guess is that because of the overextrusion, the pressure builds on the nozzle because there's less room for the filament to go in places and thus it affects the retract. Usually doesn't cause problems, but with this model that has small pillars there's limited space for filament to go to. But the filament changes worked beautifully, no a single failed filament change whicj is great.
IMG_20201010_175739.jpg
https://www.thingiverse.com/thing:2588021
https://www.thingiverse.com/thing:1917553

Another vase. With bit more retraction and reduced the perimeter/infill overlap. This one failed, not because of failed filament change but because the red filament broke during print while coming from the roll. In this case a filament sensor would have been nice. Kinda wonder what caused the break, the brand is 3DJake which isn't the cheapest. Anyhow, measured the position where the red stopped extruding and printed the rest of it, hopefully I can glue the parts and get a proper vase.
IMG_20201003_150308.jpg IMG_20201010_132025.jpg
https://www.thingiverse.com/thing:1917508

So 4 extruders tested, 2 more to go. Perhaps another vase, that gives a good exercise to filament change setup if the colors go all the way, this one looks interesting: https://www.thingiverse.com/thing:1917511