Top Spool Holder for Direct Drive
Description
Remix of my previous spool holder to accomodate my new direct drive extruder. I have unfortunately gone to the dark side and this version requires some hardware. Sorry. The extruder end of the reverse bowden setup is very specific to the Microswiss direct drive extruder upgrade as it attaches to the lever arm. You may need to grab a design specific to your extruder setup which I'm sure there are many on here. Caveats ====== If you're going to mount your spool up top, take the appropriate precautions to avoid problematic vibrations: 1. Brace you machine properly. Just do it anyway. 2. Set your machine on vibration dampening feet (squash ball feet are terrific). 3. Ensure you spool holder is securely attached. Even a small amount of play will allow for vibration. 4. Take care with your acceleration and jerk/square corner settings. Eliminate vibration at the source. So... on to the good stuff. Features ==== * It holds your spool!! * Mounted securely on the top of the frame using 5mm bolts attached to drop in frame nuts (in my case). * Uses cylinder from original spool holder. Funny story. See below. * Attachment for reverse bowden. Use mine or print your own. Issues ===== Does remove some height from your printer. The last time I used to top 100cm of my printer was never, so I don't have any issues with that. You may. Reverse Bowden ============= You should use a reverse bowden setup for the simple reason that unless you do, your x trolley and the extruder will be tugging on the spool directly when they traverse at speed, which will leave artifacts on your print and spins the spool leaving loose coils and possible tangles. Funny Story ========= While I was redesigning the spool holder, I thought it would be the time to redesign the cylinder as well to add some bearings, so I did. Ooooh smooth. But now, with no friction, there was nothing to stop the the spool from over-rotating just with the strength of the filament itself and I ended up with loose coils. I figured I needed some friction, so that's when I added the reverse bowden. And discovered the real reason the the setup. Sometimes I'm a bit of a dummy. But still the spool ended up with loose coils. So I looked at the auto-rewind spool holder which looked like a sweet piece of engineering. But the engineering gods are simple folk and they frown upon overly complicated solutions. So while I was thinking I put the original cylinder back on and did some other prints. Lo and behold! It was perfect! The perfect amount of friction to allow incremental rotation (no slopping like before) but no rotation under its own steam. And that, my friends, is the story of how a simple plastic cylinder provided a far superior engineering solution to any overly designed and complicated alternative. Amen.
Statistics
Likes
4
Downloads
0