2016-10-23 (Su) Clockwork Theremin

A custom spoked hub was printed to match the gear. Since the size of the hole saw couldn't be changed, it was necessary to change the size of the part. This was the opposite of conventional design where the cut would be made differently to accommodate the part. In a way, 3D printing has kind of turned that aspect of design on its head.

Spoked hub with no wiggle room

Very short screws were purchased from a local hardware store. The screws were #2 (1.5mm) and 1/4" (6mm) long. Twelve screws were purchased since two hubs would be installed and each hub used six screws. The number of screw holes was programmed to match the number of spokes. If desired, the hubs could have been printed with any number of screws or spokes but six seemed reasonable at the time. Matching the number of spokes to the number of screw holes also had the benefit of attaching a screw at the termination point of a spoke for maximized stability.

Underside of installed hub

Working with the miniature screws was difficult. They were prone to slipping and bouncing into unwelcome places. The ring finger magnet was a huge convenience when picking up and handling the screws.

Utility finger magnet

Parts list:

The rest of the posts for this project have been arranged by date.

First time here?

Completed projects from year 1.

Completed projects from year 2.

Completed projects from year 3.

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2016-10-21 (F)