Tootfinder

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@penguin42@mastodon.org.uk
2026-01-18 18:13:34

Continuing in the process of measuring the speed of my turntable in the oddest way; here is the FFT before and after oiling & replacing it's belt. Hmm, it's clearly a bit fast before and a bit slow after; it's not got any speed adjustment mechanism, it's a belt on an AC driven motor.
This FFT and plot was done using #labplot using the waveforms gathered by

A set of 4 graphs, labelled Pre oil 1, Pre oil2, Post Oil1, Post oil2, with a horizontal axis of frequency, peaking at about 35Hz, a marker line at 35.55 Hz shows the pre are just faster, and the post a bit slower.