Prusament 2KG Spool Dry Box, Drybox mounted to Prusa XL / 3030 Frame Using Filler Brace (Updated for all positions)

I wanted to be able to use Prusament 2KG spools in an enclosed dry box mounted on the Prusa XL 3030 frame. I remixed my Universal Rewind Spool Dry Box, Drybox mounted to Prusa XL / 3030 Frame Using Filler Brace to work with MattB’s Wider Filament Roller and a modified version of his Roller Base , a remix of HugoG’s Filler - Filament Holder .

I extended the base of the dry box to accommodate the Prusament 2KG spool. I printed K2ij3’s Filament Spool storage Box gasket in TPU and glued it in the dry box base.

I made an alternate version for the bottom with a window and window frame to allow you to see inside. The window has a viewing area of 100mm x 35mm. This version uses an additional (8) M3x8 countersunk head screws and M3x3 brass heat set inserts to fasten the window frame to the base. I cut and snapped the 2mm acrylic I purchased from a local hardware store. The acrylic was sanded to fit the window frame. Since, it was such a tight friction fit no glue was required. I also made yet another version of the window bottom but included an optional hygrometer to monitor the humidity.

Then, I took MattB’s Wider Filament Roller Base and removed the Filler attachment on one side to help spool insertion as well as shorten the height of the roller base to have clearance for the removable desiccant container. For the lid, I had to shift the filler profile brace holes to center the wider filament roller with in the dry box.

I also made an alternate lid, desiccant container with cover to allow the use of 2-5mm desiccant beads to help keep out moisture. This version uses an additional (2) M3x10 socket cap screws and M3x3 brass heat set inserts to fasten the lid and desiccant container together. The desiccant container with cover uses (8) M3x8 screws and M3x3 brass heat set inserts. This will allow you to replace the desiccant container while keeping the lid attached to the Prusa XL frame. There are a total of (9) holes in the lid that was at first to hold brass heat set inserts. Initially, I just had a cover that went on the lid. This worked fine but I found that I had to remove the lid to replace the desiccant beads. So I adapted a removeable desiccant container with the original design and just use (2) of the brass heat set inserts to allow the lid to still be mounted when changing the desiccant beads. There’s about a 20 percent drop in humidity using the desiccant version.

The grill of the desiccant container bottom and top cover is slicer generated. In Prusa Slicer, import the lid cover as one object with multiple parts. Add an infill modifier for an infill of 30% with any pattern. I chose Honeycomb for mine. Also, add a layer modifier for top shell of 0, bottom shell of 0, and a layer of 0.2.

For either version, you will need to download MattB’s Wider Filament Roller and K2ij3’s Filament Spool Storage Box gasket and latches to use this. I used K2ij3’s original thicker box version as the base. The original Prusa XL spool hardware can be reused to mount the drybox. Optionally, you can use zip ties to keep the wider roller and wider roller base together.

I uploaded a Prusa Slicer 3mf file of everything to show orientation. The base, lid and window frame will require supports. The file numbering is in relation to what spool print position. Ex: Base Window 175 - 1 - 3 means windowed base for spool print position #1 and #3. I'm still new to creating files for 3D printing. This was cut, pasted and built in 3D Builder. The models are in several pieces as I noticed the more I merged parts the more distortion in printing. When importing the 3mf files in Prusa Slicer, I load the file as a single object having multiple parts and the file loads how it is supposed to look.

Added 8/18/24 - modified spool base file, including a merged one Added 2/2/25 - spool position #1 - #3 and #4 in both window and hygrometer version, also updated the Prusa Slicer file to include position #1 - #3 and #4

Max Spool Dimensions:

Diameter: 210mm Hole Minimum: 40mm/48mm (diameter of Filler Roller/including zip tie head) Width Maximum: 145mm (length of Filler Roller)

Hardware and Materials:

Lid (4) M3x40mm socket cap or button head screws

Optional Desiccant version - same as above with additional (2) M3x10mm socket cap or button head screws (8) M3x8mm countersunk screws (10) M3x3 brass heat set inserts

Base (4) M3x40mm socket cap or button head screws (1) PC4-M10 pneumatic connector (1) PTFE tube 4mm OD (4) M3x12mm socket cap or button head screws (4) M3x3 brass heat set inserts

Optional Window version - same as above with additional (8) M3x8mm countersunk head screws (8) M3x3 brass heat set inserts (1) 103mm x 39mm acrylic (2mm thick)

Optional Hygrometer version - same as above with additional (1) standard rectangular hygrometer (48mm x 28mm)

Roller (For Each Spool) (2) 608-2RS Skateboard Ball Bearings (2) 8" zip ties