Storage box filament gland with two holes. This version has a customizable number of filament openings. This version also fixes two problems I had with the earlier version:
- It's now much easier and faster to print, requiring no supports whatsoever
- Filament moves through it much more easily than the previous version
When you assemble this, cut a short length of PTFE bowden tube a little shorter than the center post itself as seen in the first picture. This fits between the festo fittings and keeps the filament lined up.
Four M5-0.8 heat-set inserts go into the corner pieces for the "outside" pieces.
Two M5-0.8 heat-set inserts go into each filament post, from each end.
Use the drill template piece to drill holes. I used a 5mm twist drill for the corner screw holes, and a 5/8" forstner bit for the center hole. The holes drilled don't need to be the exact size as long as the plate still covers them.
Once the inserts have cooled a bit, insert a short piece of PTFE into each filament post, then thread an M5-4 push-in fitting into each end. The PTFE tube should be short enough to account for how far the fittings thread in so that they do not compress it, as this will cause filament to bind up inside the post instead of sliding through freely.