Individual-Spool Dry-box Inserts and Modified Universal Auto-Rewind Spool Holder

cults3d

Need to move your spool of filament into a dry-box while still using the Universal Auto-Rewind Spool Holder? This set of files will let you do so. This set of modifications and new custom parts moves VincentGroenhuis' rewinder into a Rubbermaid 1776473 21-Cup Dry Food Container. When combined with a panel mounted pneumatic fitment or mmu tube holder you can print directly from this dry-box. The old container I made this for originally is no longer available so I updated the version in the link above. Use this better axle (https://www.thingiverse.com/thing:4324181) remix made by itnaanti (https://www.thingiverse.com/itnaanti/designs). For keeping a set of dry-boxes on top of the mmu compatible printing enclosure (https://blog.prusaprinters.org/mmu2s-printer-enclosure/) see the dry-box holder (https://www.thingiverse.com/thing:3867177), specifically designed for the Rubbermaid container used. Five of these holders are required, as well as 470 cm of new longer and wider tubing. The new tubing is 4mm inner diameter (ID) and 6mm outer diameter (OD), from now on called 4 ID/6 OD tubing.The lengths to cut are: 4x 90 cm 1x 110 cm If you value symmetry over minimum tubing length you can use a 3-in-the-front-2-in-the-back pattern and cut a 90 cm piece to 110 cm instead. This will give a total tube length of 480 cm. NB: due to the increased length of tubing required to use these containers on top of the printer enclosure, using the same 2 ID/4 OD tubing the mmu came with, but cut longer, will not work. The friction introduced is too high and will cause frequent jams, especially during filament unloads. This is due to the slight deformation of the filament by the bondtech gear during unload being too much if there is already friction from 90cm of tubing. Previously I used very short lengths of 4 ID/6 OD tubing, but the reverse torque of the rewinders pulled the filament out of ready-to-load position. Now however the 90cm of tubing is enough friction to prevent the rewinder pulling the filament out, but low enough to feed beautifully. I've had no load/unload issues since switching to the high diameter tubing. In order to use 4 ID/6 OD tubing you'll need a push-to-fit PTFE holder (https://www.thingiverse.com/thing:3812486) to replace the bracket at the back of the MMU. If you instead want to use PC6-M10 pneumatic fittings see the source file (https://www.thingiverse.com/thing:3233579) I used to remix my version. The pneumatic connectors can be bought inexpensively from ebay, if you're willing to wait a couple months to get them. The tubing can be bought most easily from McMaster-Carr at $0.55USD/foot A further issue that may arise due to usage of these dry boxes is a back heavy enclosure lid. If you are careful it is not an issue, but it may happen that when you open the lid too far it flips past the axis of rotation to the other side and crashes all of the dryboxes to the ground and breaks the hinges. However fear not, I have experienced this failure on your behalf, and designed a part (https://www.thingiverse.com/thing:3958071) to prevent this from happening to you. The tube holders at the top of each dry-box are found here (https://www.thingiverse.com/thing:4052228) Change log v1.1 Sept 16 2019 remove square boss on both sides thin roundEndAxleHolder container-side wall by 1mm thin roundEndAxleHolder inside-facing wall by 1mm v1.2 Sept 18 2019 deepen counter-bore for bolts to avoid snagging on auto-rewind dial thin holders to make space for larger spools v1.2 Nov 1 2019 tighten hex nut counter-bore to prevent spinning of nut. Previous nut version was v1.1 Add 3mf export from solidworks