So I installed this on on Ender 3 (non-Pro) and I seem to be running into jamming issues between tool changes. I already went ahead and replaced the included bowden tubing and swapped them out with Capricorn tubing. While this makes loading it by hand fairly easier, the tips of the filament formed by the custom gcode still have a noticable bulge at the end of them (1.9 mm thick according to my calipers) and this fatness seems to get stuck in the Y splitter, or even earlier on the way out of the dual gear extruder I have on my Ender 3. One way or another, between tool changes one filament ends up colliding with a previous filament in the Y splitter that is supposed to be out of the way.
Is there a way to increase the pressure of the gears on the MK2's extruder, or is there a gcode tweak I can make to eliminate the bulge?
FWIW, to install the Capricorn tubing I simply got some 4mm compressor tube connectors to connect the 4 tubes coming out of the MK2 (which I snipped down to a couple of inches) to the Capricorn tubing I added. The filament passes through the connector just fine.
Let's start with the first problem first... that seems to be the issue. Can you show me a video of it loading... as well as a picture of the top of the 3D Chameleon after you hit the home button (for 1 second.) It seems you're not aligned properly... is my guess. If that's the case, you need to tap and hold the button for about 22 seconds and watch for the cam to vibrate 3 times acknowledging that it has reset it's home position. (All the other problems are associated with the first.)
Well I tried to run a test print, just to get to a point where it at least loads the first tool, then forms the end of that tool before switching to the next, but now I can't even get that far. For some reason, the first filament never reaches the hot end and starts printing air. I made sure all 4 ends of the filaments were snipped at a clean 45 degree angle, and fed just before the Y adapter, for the few prints I tried. Every time, the first filament reaches the Ender 3's extruder, but for some reason does not get fed to the nozzle all the way.
And also, very strangely, sometimes the MK2 would randomly start feeding in another filament before the first one, and THEN start feeding in the first filament, and run into a traffic jam in the Y splitter because the other one is already fed in.
It happens, I would say...every 1 out of 3 attempts with the same gcode.
And when I ignored the first filament not actually printing out and just let it continue to the next, when the MK2 tries pulling out that first filament, the gears may be spinning but it isn't always pulling the filament through. I have to yank on the filament sticking out of the back of the MK2 to help it actually pull it out of the Y splitter enough to let the next one be fed in. Same goes for when it's feeding filament towards the Y splitter, the MK2 is spinning at times but there's nothing moving, and you can hear the gears just grinding against the filament.
It seems like the more I try and solve this, the worse it gets (-_-);
I'm just...kinda getting over trying to get this to work, honestly. I'm sure in a year or so 4 color (or more) printers will be fairly affordable.
That said, I know I just listed a myriad of problems, but I'm really not expecting much as this point. If you have any suggestions for the extruder gears on the MK2, I would be willing to give that a shot at least. That seems to be the biggest issue right now.
Can you post pics of your tips that are getting stuck? That'll help me diagnose it.