Stepper-driven pointer with continuous rotation: the steppers are fixed so no cable tangles.

Print Settings

Printer:

Mini Kossel

Rafts:

No

Resolution:

any

Filament: Random PLA PLA White

Notes:

Belts: Uses 2x 200mm length, 6mm wide GT2 belts

Machine Screws: Assorted M3 machine screws & grub screws

Shafts: 3x 6mm shafts: ~120mm, ~75mm & 300mm (depending on how long you'd like the pointer). I used 6mm carbon fibre rods that I had laying around.

Pulleys: 2x 20t GT2 pulleys, can be metal or printed from https://www.thingiverse.com/thing:11256

Bevel Gears: 2x 45 deg 1:1 bevel gears, fixing holes drilled M2.5 and tapped M3 to accept 6mm M3 grub screws. I bought these from RS Components (stock no 521-6058, https://uk.rs-online.com/web/p/mitre-bevel-gears/5216058/?sra=pstk) - check how much you can buy bevel gears for before you decide to make this, they are not cheap

How I Designed This

Built in OpenSCAD

*.scad file is included

60 tooth pulleys are adapted from pulleys generated from https://www.thingiverse.com/thing:11256