This is the gist of the filament rack I built. Not too expensive, not horribly complicated. Easy access to all spools. Framework for potentially added a full enclosure to protect against dust and humidity. And most importantly — cheap!
It has 24 posts, each with the capacity to hold two 5 lb spools (by length that is. It seems like it should be strong enough but no guarantees haha). I used to just slide a bunch of spools onto some pipe or threaded rod or whatever, but changing them out was a pain since you had to move all of the other spools to get to the one you wanted (which was the center one 99% of the time it seemed).
Bill of materials:
(5) 2×4 x 8′ lumber ————– ~$2.50 each
(2) 1/4″ x 5′ PEX tubing ——– ~$2.00 each
(3) 10′ x 3/4″ Sch 40 PVC pipe – ~$2.50 each
(24) 1/4″ x 4.5″ Bolts ————– $0.36 each
Bunch of 2.5″ screws ———— ~$3.00
Cost ———————————- ~$36
There is 1 foot of spacing between each holder.
2×4’s are cut to 4′ long for the horizontal beams, and 3′ long for the vertical beams (vertical beams were originally 4′ long but I had to trim them to make it fit in my available space).
Bottom stabilizer feet 2×4’s are 26″
PVC is cut to 22″ lengths
PEX is cut to 1.75″ lengths (2.5″ lengths if you actually have 10′ of PEX. I didn’t)
Oh, and you’ll need some hot glue to glue the PEX onto the 2×4’s.