In order to protect the filament spools from moisture during multicolor prints, I developed this simple approach using the stock MMU3 spool holders and PTFE tubes.
The box can easily accommodate five spools of 1kg prusament (we even use 4 spools prusament and one slightly larger spool).
Assembly:
Parts needed:
10 x M4 hammer nut
10 x M4 x 8 screw
1 x 2020 aluminium profile (445mm length)
5 x PC4-M6 fittings
1 x IKEA Samla Box with lid 301.029.74
1 kg silica beads
Print:
10 x Spacer
5 x Fitting_mount_5.4
2 x Silica_box
2 x Profile_mount_3°
4 x Sambla box clips (https://www.printables.com/de/model/124294-ikea-samla-box-clips-45l65l; optional)
- Disassemble the provided MMU3 spool holders and prepare one M4 hammer nut, spacer and M4x8 screw per spool holder, then reassemble the spool holder as depicted below
- Repeat for all spool holders and mount them to the profile using the hammer nuts, pay attention on the correct alignment of the hammer nuts; the corrugated side of the nut should face towards the spool holder upon assembly to the profile. Then verify that the distances between the holders fit the used filament spools. Attach the Profile_mount parts by sliding them into the profiles.
- Put the assembly into the Samla box, then either drill or melt holes into the box to mount the PC4-M6 fittings; check the position of the holes by inserting the filament spools; we mounted the fittings on the lower part of the box. Secure them with the Fitting_mount parts on the inside of the box.
- Lastly, verify that the filament can easily be redeemed, fill the Silica_boxes with silica beads and put them in the box; we used a colored version to see when the silica cannot absorb any more moisture; a cheap moisture sensor can also be used.
- Done! The filament box is now ready to use; just attach the PTFE tubes from the MMU3 filament buffer to the respective fittings of the box and feed the filament to the buffer :)
Dont forget to put the lid on top of the box afterwards…
Frinn
