Filament spool holder using a Lock & Lock container (parametric)

thingiverse

Convert a Lock & Lock container (or any other container) into a filament spool box with bearings and temperature/humidity sensor for use while printing. To be mounted on any of the [Filler holders](https://www.thingiverse.com/thing:3020026/files). Parametric source is here: https://github.com/thebgfan/3d-models/tree/main/spool-holder ## Components to 3D print - `base.stl`: Stationary base that sits outside the box and allows it to be mounted. E.g. for an Ender 3 using the stock metal holder plate, you can print the [Filler](https://www.thingiverse.com/thing:3020026/files) bolt (`FillerBraceCrealityBolt.stl`) and nut (`FillerBraceCrealityNut.stl`). - `spacer.stl`: Stationary spacer that sits inside the box, houses the nut and sits against the inner part of the bearing. - `spindle.stl`: The rotating spindle, connected to the outer part of the bearing. You can put desiccant inside and add a cheap temperature/humidity sensor. ## Parts needed - 1 airtight food container, e.g. Lock & Lock 2.5 liters: https://www.amazon.com/dp/B00BUKKBTO - 2 608ZZ ball bearings (8mm x 22mm x 7mm), e.g. https://www.amazon.com/dp/B092LGTD9P - 1 M5 bolt of about 40mm length (excluding the head). If you are customizing the code, it will print the length of the bolt you need - 1 or 2 M5 nuts - Some Bowden tubing to guide the filament in the box - Hot glue to glue the Bowden tube - (Optional) A flat piece of rubber to use for better isolation of the base - (Optional) Desiccant for keeping humidity down - (Optional) Circular temperature/humidity sensor, e.g. https://www.amazon.com/dp/B07GR67G1M ## Build steps 1. Drill a 5mm hole in the center of the box 1. Assemble everything in the order (from outside-in): M5 bolt > base > rubber isolation > container wall > spacer > bearings > spindle > M5 nut(s) 1. (Optional) Add desiccant in the spindle hole 1. (Optional) Add temperature/humidity sensor 1. Drill a 4mm hole on the side of the box at a steep angle (see picture) 1. Run Bowden tubing through the hole and use hot glue to secure it