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 1861476 Zylar Container. When combined with a panel mounted pneumatic fitment or mmu tube holder you can print directly from this dry-box.
For keeping a set of dry-boxes on top of the mmu compatible printing enclosure see the dry-box holder, specifically designed for the Rubbermaid container used. Four of these holders are required, in addition to around 270 cm of 2 mm ID PTFE tubing cut into:
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 100 cm instead. This will give a total tube length of 280 cm.
v1.1 Sept 16 2019
- remove square boss on both sides
- thinned roundEndAxleHolder container-side wall by 1mm
- thinned 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
Use PETG if at all possible, as the parts are quite small and need to be functional strength.
NB: the parts are very thin, so wait until they are completely cooled off before removing them from the bed, or risk warping them.
Print the inserts lying flat, except for the slotted insert, which should be printed with the opening facing up with supports under the slope if you so desire. Use the provided 3mf file to get an example selection and layout which can be modified.
Warning: the spring is very difficult to get to stay on the plate and not ruin a print. I therefore recommend printing it separately so it doesn't ruin a 16h print with its 4-5 retries before the plate is sticky enough to have it succeed.
Parts to Print
- Curved nut (regular or XL)
- Spring flat
From This Set
- One of each STL in the base folder
- One extra Axle Holder Nut
Example layout containing all the required parts. See provided 3mf file to get all parts already laid out.
Tips for installation
- Mark or make note of the end from which you measured the 110mm as the location will be off by 5mm if you don't use the same edge when marking the holes for the other sides' holders.
- Drill on low speed or you might crack the plastic, as it seems to be PC.
- Use a razor scraper to trim off the drill burs.
- Use socket head M3x10 spare bolts from the prusa kit, and the corresponding hex nuts to attach the inserts.
- Use only a single curved nut to attach the spool onto the rewinder hub.
- For v1.01 springs make sure the spring/clutch/dial assembly is on the right side, looking at the back of the dry-box.
- Assemble the rewinder using the instructions from the original rewinder by VincentGroenhuis.
Dimensions for drilling the four required holes into the container
- Drill the holes in the measured locations shown in the picture above.
- Using the same drill bit, pre-drill the holes of the four insert pieces to allow the bolts to pass easier.
- Put two M3x10 bolts into the holes of the slotted end axle holder's two holes, pushing them most or all of the way through.
- Reach inside the container and, making sure the open end of the U shaped holder is facing towards the opening of the container, push the two bolts out through the holes of the dry-box. Pushing the bolts through as far as possible makes the next step easier.
- Keeping one hand inside the container with fingers on the bolts, turn the container onto it's side with the bolt-protruding side facing up.
- Place one axle holder nut over the protruding bolts and push the bolts up through the holes as much as possible.
- Place two hex nuts into the hexagonal counter-bores on the two holes.
- If possible, turn the bolts with your fingers to get at least one rotation of purchase on the threads of the nut.
- Using a 2.5mm hex key (if you used the prusa spare hardware), tighten the bolts evenly until they are fully tight. The head of the bolt should sink into the counter-bore with a little bit of the top poking out.
- Repeat steps 3-9 with the round end axle holder and remaining axle holder. The bolts will sink further into the part than the surface of the part.
- Install your preferred panel-mounted tube feed-through, and insert one of the PTFE tubes from the MMU into it.
- Lower the assembled spool holder and spool contraption into the dry-box. If you are using the v1.01 spring, put the spring side on the right when looking from behind, with the spool delivering filament from the top of the spool. The spring should be on the left if the spool is delivering filament from the bottom of the spool.
- Insert the filament into the tube, feeding it all the way to the mmu.
- Select "load filament" for the respective filament number.
- Push the filament until it engages in the MMU bondtech gears.
- If desired, put desiccant into the bottom of the dry-box, close the lid and you're rockin'.