Adjustable 50mm diameter spool holder for FFCP
by DrLex, published
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Tired of printing a new spool holder for every new brand of filament you buy, because they use spools with a vastly or slightly different thickness (axle length)? No more with this universal adaptable spool holder. This is The One Spool Holder to Rule Them All.
It has an adjustable length that allows any spool with 54 mm center hole to be mounted securely, if its thickness (at the hole) is between 35 and 80 mm, or even up to 100 mm if you wish. The length is adjusted with a knob. You can avoid that spools with a recessed axle (like the ones that come with the FFCP) rub against the side, by mounting a spacer ring. See the post-printing section for illustrations.
(There are two versions of the screw, the ‘smooth’ one is probably the nicest, but the original one is still available for those who like some extra tactile feedback.)
Another advantage of the adjustability is that the spool holder can act as a brake, i.e. the amount of friction can be regulated by tightening the flange against the spool. For instance, you can lock an unused spool so it doesn't unwind from vibrations while printing with the other spool (if a spool unwinds, there is a risk that the filament will tangle into itself when you print with it).
Assembly is straightforward. First put the screw through the end piece and secure it with the circlip (see first image in ‘post-printing’ section). Then screw it onto the base. For spools that are considerably wider at the edges than at the axle, mount the spacer ring against the base (second image in ‘post-printing’ section).
There are three end pieces, most likely you'll need the 35 mm one, which allows spools with thickness between 55 and 80 mm to be mounted. The 15 mm tip is for spool thicknesses between 35 and 60 mm. There is also a 55 mm tip, which I added on request but which I have not tested, so I don't give any guarantees that it will work well. This requires the longer version of the screw and allows spools between 75 and 100 mm thick.
To make swapping the end pieces easier, print and mount a screw and circlip for each of them.
I recommend to print the screw and the circlip at 0.1 mm layer thickness. Ensure it is strong because it will have to bear quite a bit of weight when using wider spools. I used 3 perimeters and nearly no infill (you shouldn't rely on infill for strength of parts like these, basic engineering learns that stress will be concentrated in the outer shells).
The other parts can be printed at any desired resolution, I used 0.27 mm. Infill is not terribly important, again: strength will be mostly in the shell. I used 3 perimeters for all parts.
The base comes in two versions: one with a ready-to-use hollow support that should make it easy to print the nasty overhang, and one without the support if you think your slicer can do a better job at generating supports. To minimise the risk of the support being knocked over by your unused nozzle, orient the part such that the support is at the same side as the nozzle you are printing with (for instance, if you print with the right nozzle, the back of the holder should be pointing to the right during printing).
The screw is standard M12, should you want to replace the printed version with a metal one.
(P.S. can some Thingiverse developer please disable the ‘select groups’ menu until the Thing has actually been published. I tend to ignore the small print and select a group anyway, and then I get confusing error messages and usually I need to close everything and re-open it to get it back in a usable state. If it is not allowed to use a UI element, then the element should be disabled instead of adding text “don't try to use this”.)
FlashForge Creator Pro
0.27 mm and 0.1 mm
You can scale the spacer in the Z direction if you need it wider or smaller (most slicer programs should allow this).
For the 15 and 35 mm tips, you only need the regular screw. You need the longer screw for the 55 mm tip.
If you plan to use the 55 mm end piece, you should take extra care to print the base in a strong way, because it will need to endure extra stress (moreover, the reason why you would want the long end piece is probably because you have a huge and heavy spool to start with…)
Added 55 mm tip and longer screw on request.
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Adjustable 50mm diameter spool holder for FFCP by DrLex is licensed under the Creative Commons - Attribution - Share Alike license.
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