2023-08-07 (M) GrinderCompassMKII Jar demo

Based on yesterday's dimensions, I designed a simple compass that could fit into a clear plastic jar I had. The pot was so small that I had to cut out extra clearance from the top and bottom discs to install all the compass parts. I measured my plywood, which was 7/64" (2.78mm), but I assumed it was 3mm. I changed the drawing to ensure a tight fit between my parts.
Parts for jar demo

I cut the pieces and ran a marker over the bottom to hide the scorched back. I dropped the unit, but the magnet did not dislodge, so the design was solid. I still see friction resisting the spinning, but I have plans for the next version, which should be more repeatable. This version relies on my questionable ability to shape aluminum rods, but the next one will use more manufactured parts.
Jar demo on keyboard for size reference

GitHub files for GrinderCompass
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
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8

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