2016-10-19 (W) Clockwork Theremin

Cutting the core out of a gear was nerve-wracking. A lot of time went into shaping the gears, especially the large ones so taking a large chuck out was worrisome. Fortunately, the process went well even though it was done over a utility sink rather than a proper work bench. Using a scratch awl to mark the center of each gear was done long ago and a good idea.

Gear with center cut out

The hole saw cut a larger diameter hole than expected. This could be due to a couple things. First, the offset teeth of the saw were intended to cut a hole larger than the diameter of the drum. Second, there was wobbling due to an unstable work surface and that could have bored out the hole more than intended. Third, measurements from the last cut may have been inaccurate.

Poor fit between the gear and the hub

Four hubs total will be used in the project. One of the hubs had been printed so the remaining three can be printed to match the actual size of the hole cut. It could be possible to get the hub close to the center of the gear by estimation but with a 3D printer available there's no reason each hub cannot be custom printed for that gear. A quick measurement was taken on the gear and a new hub was printed. The new hub fit without wobbling.

Custom printed hub for a 300mm diameter gear

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.

Disclaimer for http://24hourengineer.blogspot.com/

This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.

This blog, including pictures and text, is copyright to Brian McEvoy.

2016-10-19 (W)