5KG Spool Holder from 2040 Extrusions

I wanted to feed my Voron Trident using 5KG spools of Polymaker ABS.  Because of where I have it on my bench, there was no good way to use one of the many holders for large spools available on Printables (including the one I made to fit Akro-Rail a while back).  To feed smoothly, I needed to get it up higher than bench level, and hanging it from the ceiling was out because the filament coming down in the way of one of my cabinet doors would have been a nuisance.

Since I didn't want to make something to mount it directly to the printer's frame, but it needed to be relatively high above the bench, making it out of extrusion rail seemed to be the best bet.  And I had a bunch of 2040 V slot extrusion left over from a few years ago when I built a couple of Bear Upgrade framed Mk3S+ printers and some other stuff.  The obvious solution was to build it in more or less the same way that the Bear frame is built, but to the dimensions needed to put the spool at the desired height.  It's not exactly the same, because I was working with whatever leftover corner braces I had on hand, but it's close.

To build this, you'll need 4 of the printed feet from the Bear Frame, and I used the Y-ends to cover up the ends of the extrusions for appearance.  You will also need the Voron style “axle” from my earlier spool holder for Akro-Rail, and 2 each of the holders I designed here.  You'll need minimum 4 of the 4mm thick corner braces as used in the Bear frame for the base,and whatever braces or corners that you choose to hold the uprights.  Since you're just building a spool holder and not a printer, it doesn't have to be exactly the same.  I used whatever pieces I had on hand.

You'll need part 5kg-pm_axle_1.1.stl from here:

https://www.printables.com/model/648518-wall-mount-spool-holder-for-large-spools-and-akro-

And 4ea foot.stl from here:

https://github.com/gregsaun/prusa_i3_bear_upgrade/tree/master/printed_parts/common_to_all_versions/stl

Optional 4ea y_end_caps.stl for appearance.  These are attached with M4x5 set screws (12 total)

The whole thing is assembled with M5 button head cap screws as per the Bear frame upgrade (check the github linked above for further details.  You don't need the special V-slot nuts like the Bear frame kits include.  Regular ones will work fine, as will the roll-in nuts as used in the Voron series of printers.

As far as lengths go, the only ones that really matter are the width-wise extrusions that set the width of the stand so it will interface with the axle correctly.  I used 272mm, but you could use longer pieces if you are willing to let them protrude out the side.  The lengthwise base extrusions I made 330mm long, which is the same as the corresponding extrusions used in the actual Bear frame.  But use whatever works in your application.  The verticals should be made however long you need them to position the spool where you want it.  I made mine 450mm long to put the 5kg spool where I wanted it in relation to my 250 Trident's frame.