Gears are cool!

I'd seen a few axis visualisers and such like in the shape of “gears”, but most of them were artists impressions of gears (rectangles or trapeziums stuck on the outside of a circle) rather than proper involute (or cycloidal) form gears and that sort of thing irritates me, so  I thought I'd design my own.

I've made a set to include a control knob and visualisers for X, E and Z axes.  All are module 2 gears.  You can see them all in the last photo.  This is the extruder visualiser and has 18 teeth (matching the X-axis visualiser and larger control knob).  Like many other extruder visualisers, it needs an 8×3 mm magnet to attach it to the extruder motor.  There's a small brim to help get the magnet in the right place.

Links to all the gears are here:

• Collection: https://www.prusaprinters.org/social/187908-dral/collections/106521
• Extruder Visualiser: https://www.prusaprinters.org/prints/117065-involute-gear-extruder-visualiser-for-mk3s
• X-Axis Visualiser: https://www.prusaprinters.org/prints/117066-involute-gear-x-axis-visualiser-for-mk3s
• Z-Axis Visualiser: https://www.prusaprinters.org/prints/117069-involute-gear-z-axis-visualisers-for-mk3s
• Control Knobs: https://www.prusaprinters.org/prints/117060-involute-gear-control-knobs-for-mk3s

There's a video of the visualisers working here: