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Re: Gearing Mini CIMs
Perhaps some folks can share their ideas more... but we really liked our launching mechanism...
We used ~100lbf of constant-force springs to provide the power, and used a miniCIM in a modified BallShifter to pull it back, hold, and release. We used a unique gear ratio (somewhere around 10:1, which had good torque but was on the non-optimal side since it was only initially designed for 2/3 the spring force), added a 3/8" ratcheting wrench to provide the stop, packaged it into a basic two-plate with standoffs frame, and put a 1" spool of Spectra cord on the output shaft. This all worked great!
I'm about to leave on vacation for the weekend, but there were some important design constraints in doing the above... for one, the dog shifting mechanism won't be able to retract under that amount of load... we tried... don't bother (unless you have a sense of adventure, like MacGyvering things, and/or have some extra cash to spend). :-)
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"If you want to build a ship, don't drum up men to gather wood, divide the work, or give orders. Instead, teach them to yearn for the vast and endless sea." - Antoine de Saint-Exupery
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"Simplicity is the ultimate sophistication." - Leonardo da Vinci
Student: 2006-2010 (#1519)
Mentor: 2011-Present (#1519)
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