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Alternative Filaments.ca master spool

by ckitching May 21, 2018
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Nice design, thank you. Can you link the spool holder you're using, looks nice and would like to give it a try.

It's based on this one: http://www.thingiverse.com/thing:1794348

I have a slightly different spool holder spindle with bearings in it, but it turned out to be overkill since the spool tends to slip on the plastic spool instead of rolling it. The original PVC conduit/pipe version is more than sufficient at its purpose.

Prusa i3 MK2 Filament spool holder for quick and easy swapping(ORIGINAL PRUSA I3 MK2)

Wonderful, thanks.

Good, much more sturdy than the original design.
Much thanks!

Huge thanks for the square spool, having a spool that both fits on a 200x200 bed and is connected the whole way around is amazing.

Would it be possible to make a "cloverleaf" version that still connects all the leaves while staying within the 175x175mm dimensions?

I'll see what I can do. The reason I left it open is so that it's easier to remove or add zip ties or velcro so the spool can be removed without emptying it.

Take the round version and make the sides flat to fit within 175x175mm instead of removing them. I have included a basic image of the idea.

But now that I compare my rough sketch to your renderings, I understand the zip ties problem. But it would still work once the refill spool was used up a little and less filament remained on it.

To solve that problem, maybe you could flatten the sides with the filament end clips instead? How about changing the end clips to channels, like on the RichRap master spool? Would that help?

Okay, I've uploaded a square spool version. Seems to work well enough for me, but feedback is always appreciated if you decide to try it out.

This looks perfect, thank you.

I whipped up something like that last night, and I'm doing a test print of it now. If it works out, I'll post it up in a day or two.

Thank you for including a cloverleaf design. That will fit on my printer (Monoprice Maker Select Plus) whereas the full spool will not.

I'm hoping it will work, but I haven't tried it. I'm a little concerned that the filament might slip over the side of the spool and get tangled on whatever spool holder is in use.

Well, my other option is to scale the spool by 94% in the x and y directions. Do you think that would work better?

It's difficult to say. The problem with just scaling it is that the hub the spool fits over will also shrink. This can cause the spool to not be centred properly and therefore roll unevenly which will affect print quality as your printer has to work harder to pull filament while the spool is effectively "heavier" than normal. I know the PETG refill spools are around 175mm in diameter so they might work as long as they stay centred and don't shift on the spool while printing. The PLA refills might have problems because I believe they're thinner than the PETG ones, so their spool diameter is likely greater than PETG refills. ABS refills might also be a problem since they're less dense than PETG or PLA, so there's probably a greater length of filament in each refill.

Sadly, I don't have any PLA or ABS spools and filaments.ca doesn't seem to publish the size of their refill spools, so a lot of this is just speculation. :-(

The 1.75mm PLA refill spool is also around 175 mm in diameter.