Spool slack management problems
We'll I've built and installed my MMU2 unit and successfully printed on the first try with only one jam. Overall I'm very impressed on how well this mechanically complex unit works. However, the one annoying problem I had was the spools getting unwound and tangled on the neighboring spools when the filament retracts on filament change. Babysitting the spools on a 15 hour print isn't my idea of fun. Any good ideas for managing this problem with the prusa spool holders short of a totally new design?
Re: Spool slack management problems
Two main options: Beat head against wall, or build something new. Mine works excellent and others have had some success as well.
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: Spool slack management problems
Agreed: you should remove the filament tangling from the equation, there are enough other complexities with the MMU2.
You'll see several setups in that other thread, mostly because they are fun and satisfying to design/build. Abraham's is the simplest and seems quite effective, so I'd start with that.
Re: Spool slack management problems
I actually had a problem with only one of the spools, but here was my fix:
I am using a piece of PTFE tubing and a ziptie and the old spool holder. I haven't had a single problem since!
Jonathan Kayne
Virginia Tech Class of 2021 - Electrical Engineering
Thingiverse Profile: https://www.thingiverse.com/jzkmath/about "I am always thinking about making. My future begins when I wake up and see the light." - Miles Davis