Suddenly Getting Chips in Extruder
So a couple days ago, after giving up on some experimental firmware I didn't have set up right, I went back to what I was using before....
And now I get chips l like mad!
At first I was thinking it was from the cutting blade, but I think I'm getting more of them than chance would allow them to hitch a ride down the tube, it appears to be (at least) one chip for every filament change.
What's odd is that I'm even running the same code which printed successfully before. I'm at a bit of a loss, and if anyone has seen this, what did you do about it?!
Thanks!!!
I maintain an informal list of San Diego, CA 3D printing enthusiasts. PM me for details. If you include a contact email and I can add you to the informal mailing list.
Re: Suddenly Getting Chips in Extruder
Could be that your speed-matching on load is incorrect and you may have the MMU tension slightly tighter and the Bondtech tension looser
So the chips are appearing in the Bondtech rather than the MMU.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Suddenly Getting Chips in Extruder
It is possible. They don't LOOK like that kinda chip, but it's possible.
My MMU is pretty loose (flush screwheads), my bondtechs are within a 1/8th turn of where I always have them, and I've opened it up a few times since.
The pieces look a LOT like what I've seen on other's tips, but not torn off:
This isn't a great picture, but see how that flap exists there, and WITH the teeth marks in the flakes? I think it's retraction, and hitting the monkied upper PTFE and ripping off.
That makes me think an even tighter LOWER PTFE makes sense, I have 2.0 mm (Capricorn) but maybe I should try 1.9 (Cap XS).
I'm going to replace the upper piece and see if it helps. There are SO many variables determining the actual feed/retract that it's hard to know what they all should be.
I maintain an informal list of San Diego, CA 3D printing enthusiasts. PM me for details. If you include a contact email and I can add you to the informal mailing list.