How difficult is to replicated that feeder. It seems passive .

3D Printing
,
21

@Ariel_Yahni_UniKpty for printing 2 individual colors, it’s entirely gcode dependent so you’d be dealing with everything in slicer. Just set up 2 different extruders in smoothie.
There’s no color mixing capability here, that is something that would require firmware capabilities.

22

DIY 2-in-1 out Y switcher - a bit fussy to get the G-Code right, but seems to work well enough to prove the principle to myself.

Notes:

  • Repetier 0.92 wants the “second extruder” to use the same thermistor pin as extruder 0, and hotend pin 1
    M83/M82 is helpful when doing relative extruder moves
  • Cura assumes extruder resets after tool change - add G92 E0 to enforce that after tool change is complete
  • Cura does tool change before moving to wipe tower - should probably fix that!
  • Volumetric Extrusion people: make sure to disable Volumetric Extrusion (M200 T0 D0/M200 T1 D0) before the toolchange extruder moves
    (And re enable after)missing/deleted image from Google+
23

@Jason_McMullan did you just make that, or did you already have it?

24

How does the tooling tower work? Does the system do anything intelligently then there is a color change or does the cooling tower just help dumbly to good effect? A purge wipe sequence right after color change might be a good option with less time wasted… For some Cartesians, maybe not deltas.
Brook

25

@Ryan_Carlyle just made it. Took about 3 iterations to get the filament guide channel diameter right (slight overextrusion meant I had to say it was 2.25mm to make an actual 2.1mm channel)

26

@Brook_Drumm Cura’s purge and wipe tower builds a layer after every tool change.

However, the Cura version I am using does the (long) tool change on the part, instead of on the tower, so I get some heat blemishes from the nozzle

27

If you saw @Thomas_Sanladerer 's video about this hotend, one of the important features about the hotend is how it contours the filament being pulled out of the hotend so you don’t get blebs or nicks that would interfere with reinserting the filament.

28

@Adam_Steinmark we discussed this, see the top of this thread. Or maybe it was that other thread…

29

@raykholo it was this one. My bad I missed it. Great minds think alike.