Another Generic Spool for low cost uses

thingiverse

<b>Update #2</b> I've added a new part, the extender, which sits between the two sides of the spool. This allows me to add more cable, filament, or whatever is needed on the spool. It also gives me separate pieces and lets me adjust the spool after printing to fit the size I need. The STL file increases the height of the spool by over 100% so I can have twice as much on the spool without affecting its strength. The only downside is that it needs supports, which makes one end a bit rough. If I come up with a better design, I'll rework the spool. I've had a suggestion to include a screw thread design in the center of the spool to increase re-usability, but it may use more material. I'd appreciate any advice on reducing material usage without compromising spool strength. I've also included the Autodesk Fusion 360 file so you can change its parameters if needed. I can create new STL files of different sizes if requested. <b>End of Update #2</b> <b>Update #1</b> I fixed the spoke length not being calculated for larger spools by adding a calculation to handle it. I also fixed the spoke width making spokes go off-center by fixing some constraints in the sketch. The 3Kg Spool file is built from V1 as it's still the same as V2. The 5Kg Spool file is built on the new V2 file and definitely needs a bigger than 300mm build volume (I have a CR10 S5). <b>End of Update #1</b> First off, this spool needs to be printed twice for it to be fully functional as designed. It's meant not to need supports. I built this to ship cables easier in Australia Post Bags, which reduces postage costs on our online store. I realized it can be used for nearly any spool-like use really, including obvious filament rolls. My boss thinks it looks like a firehose reel, especially when the cable was wound on! I'll be interested in what parameters people use in the uploaded Fusion 360 file for their specific tasks. I might come back with specs for the eSun refill packs if someone doesn't beat me to it... If you have specific measurements for common-ish uses, I can create an STL and upload it here. The current STL file results in a lightweight spool that costs around $1.90 in eSun PLA+ filament (1KG roll price in AUD). It weighs 42g per half spool or 84g total and fits quite nicely in AUPost's 3KG bags. See print settings to see how I got it nice and light.