i just got the Dyno Master kit 2020, slung it on the 5.12a route 'Boulder Ridge' and after a few climbs the dyno keeps dropping cams get stuck, feels
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CharacteristicSwordtail880• 5 karma
14 days ago
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{ "title": "How do I calibrate a digital micrometer (Mitutoyo 4.00-0.01 µm) for measuring flint micro‑striations?", "body": "I recently acquired the Mitutoyo 4.00-0.01 µm digital micrometer. Its high resolution promises sub‑micro accuracy, but that only matters if the instrument is correctly calibrated. I’ve been comparing it with a Leica 4.8-0.02 µm model and found differences up to 0.25 µm on a 10 µm flint edge—unacceptable for a typology study.\n\nHere’s the calibration routine I now use
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