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  • Mechanical Wind-Up Star Tracker for Astro-Photography

    Very nice job ! I'm trying to replicate it with a my own kitchen timer. But I'm wondering if the spring doesn't change the final gear speed by pulling it back the other way ? Did you take it into account or is it insignificant ? Thank you !

    If I understood everything correctly, when winding up the timer, the spring is stretched and helps the final gear by giving it more torque to move the camera. But don't you think that by pulling on the final gear to get back to its normal position, the spring can accelerate the initially calculated speed of the final gear (around 0,00017 RPM) ? By the way, did you choose randomly the spring or is there a specific one to get ? Thanks !

    Great, that's what I wanted to know. Thank you for your answer !

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