Here's the design that I used for a top-mounted spool holder for my MendelMax 2.0
You could use these as general rod holders, but I designed them as supports for an M8 rod held between two plates, 20mm apart (to suit 20mm aluminium extrusions)
As usual, here's a link to my blog, with some pictures showing my old spool arrangement and why I went to a top mounted arrangement:
I mounted it in place using 8 of my M5 Twist In Tee Slot Nuts, and it seems to be very stable:
I already had an M8 threaded rod type spool holder from a friend, which I adapted to 3kg my filament spools (~32mm hole, ~200mm outer diameter), using this bearing piece:
You can use whatever 8mm rod filament spool that you want.
See the attached photos for a general idea of how to install the spool holders.
- Print two of the M8 Spool Rod Holders.
- Fabricate two pairs of the Spool Holder Plates, including holes (use plywood or perspex, etc)
- Print 8 of my Twist-In T Slot Nuts, if required.
- (Optional) For extra support, print two of the Spool Holder Bases (you'll need extra Tee Slot Nuts)
-If using the Holder Bases (optional), figure out how far along the beam you will be able to install the holder plates, and mount using the holes in the flat of the bases, M5 screws and tee slot nuts.
- Using the lowest pairs of holes in the Holder Plates, insert M5 screws and clamp to either side of the upper horizontal member on your mendelmax 2.0 (or other aluminium extrusion type printer). Just get them tight enough to grip a little, but still slide along the beam.
- Mount the Rod Holders using the upper most pairs of holes on the Holder Plates.
- Align the holder plates with the Holder Base, and pass through bolts to secure in place (note: I didn't end up using the holder bases on my printer)
- Tighten up the screws in the lowest holes to finish locking in position.