Single Color Print Fails
Hey all-
I've recently (finally) gotten my MMU3 built and installed and it's pretty awesome, and I got the sheep test object to print after a bit of tweaking. However, now my single color prints tend to fail when using the MMU3. An early single color print yielded a large blob at the start of the priming strip:
After a few cold pulls that all came out clean, I started to print the object and it failed about 2/3 of the way up. (The intended object was basically a taller version of what's visible.)
At the end of the print the orange filament retracted back into the MMU and I did a few more cold pulls (red filament) just to check. There was a good amount of orange filament that still came out before the red started going through.
Any ideas as to what the problem might be? I eventually got the object printed by removing the tube connecting the MMU and the extruder and just directly inserting the filament. Is this the best option for single-filament printing?
RE: Single Color Print Fails
Could be a lot of things, removing the tube is a weird solution but a couple questions:
- How long are your PTFE runs from spool to buffer and buffer to MMU, and how tight are the turns? removing a tube could be reducing friction by just enough to feed better
- Have you tried with different filament and is your filament dry?
- Are you sure your filament settings in slicer are correct temps for your chosen filament?
Those are the first things I would check
RE: Single Color Print Fails
I was using the full-length PTFE tubes and all the default hardware in the standard configuration. I removed the PTFE tubes and bypassed the buffer and that seemed to fix it. Thanks for the suggestion!