Thingiverse
Quick Change Modular Low Friction Spool Arm for Lulzbot Mini by Ductsoup
by Thingiverse
Last crawled date: 4 years, 2 months ago
The original design was ugly as sin but it worked very well. The two problems I ran into over time were it was great for most 1kg spools but less so for smaller sizes and, if I was printing something with a ridiculous amount of retractions sometimes the spool would jump off (a wire tie on the end gets you by in this situation). I'm doing some other modifications so it seemed a good time to revisit and refine this design.
You'll need a 5/16x3-1/2 bolt and a couple 608 bearings. A piece of 5/16-18 allthread cut to length and a nut will also work in place of the bolt. A 1/2" wrench or socket is handy to have around for changing these around.
Spools vary greatly so if if this doesn't work with what you have, just scale and print different spacers as needed. If the spool inside diameter is smaller than the 21mm OD bearing (T-Glase for example) just skip the bearings and spacers, it'll still have less drag than the OEM spool arm.
Update:
After a couple days of use I decided to switch to 20mm spacers. The original 23mm spacers worked fine but these are a little neater, cleaner and tighter, plus they're easier to scale. If you're using standard 1kg spools these are probably what you want.
You'll need a 5/16x3-1/2 bolt and a couple 608 bearings. A piece of 5/16-18 allthread cut to length and a nut will also work in place of the bolt. A 1/2" wrench or socket is handy to have around for changing these around.
Spools vary greatly so if if this doesn't work with what you have, just scale and print different spacers as needed. If the spool inside diameter is smaller than the 21mm OD bearing (T-Glase for example) just skip the bearings and spacers, it'll still have less drag than the OEM spool arm.
Update:
After a couple days of use I decided to switch to 20mm spacers. The original 23mm spacers worked fine but these are a little neater, cleaner and tighter, plus they're easier to scale. If you're using standard 1kg spools these are probably what you want.