Rolling Spool Mount & Filament Guide (Chiron)

thingiverse

Working on a revision to this design to fix an issue with too much tension being put on the filament as it passes through the guide loop. This occurs only when the Z axis significantly moves the filament sensor above the guide loop. I took inspiration for this from "CHIRON filament support" by gtcfan and "2020 / Ender 3 Filament Guide" by Filboyt. For this design, I blended the two concepts together: a roller base for the filament spool to reduce roll resistance when feeding and integrated the filament guide. I wanted to use a sponge to wipe the filament before it's fed into the extruder because we get a lot of gunk in the air here being in a city. Unlike the original roller design, this is intended to be a full replacement rather than supported by the stock metal plate. Underneath is an arched support to provide rigidity to the form. To use this, you will need to replace the M3 hex bolts that come as stock. I bought some M3 x 20mm nuts/bolts because I intend to have two spools loaded for easy swap over. However, if you wish to use shorter ones, you can, but obviously measure before you buy! Regarding the rollers, I made them tapered towards the hollow to allow for easy insertion of wire if that's your preferred choice as gtcfan has in his original pictures. For mine, I used 2.2mm by 40mm nails at each end secured with a simple glue gun. If using a glue gun, make sure you leave the glue at least overnight to set, or the nails will sag causing the roller to touch the underside of the mount. Not a big issue; it will still turn but with increased resistance as the rollers are brushing against both the spool and the mount. I'll update photos with better ones once lighting conditions allow! Enjoy the model! If you use it, let me know. If you have issues, let me know, and we can get them sorted out (My Chiron was purchased in July 2019 and has a lot of upgrades over previous versions). And if you modify it, give a shout-out! I'd like to see what you did with it.