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Re: your thoughts on the FP CIM/2.5 CIM motor drive setup versus 2 2.5 CIM motors
For 2007, 1618 used one of each on our AndyMarks by design. Doing so allowed us to use a small CIM on our arm, which gave us some off-the-shelf options for interfacing with #35 chain. (Well, rather, it gave us options better than those we could've kludged together ourselves.) The sprocket selection was done using JVN's calculator, which I'd recommend for anybody. (We used 30-tooth sprockets on the wheels driven by the gearbox; wheel diameter was about 5.5". Those choices worked great for us, but might well have been dangerous in other hands given the designer's inexperience at the time; check them yourself to be sure.)
If you have the weight (we did) or really want to use your smaller, lighter CIMs elsewhere (we did), they're worth considering.
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William "Billfred" Leverette - Gamecock/ Jessica Boucher victim/ Marketing & Sales Specialist at AndyMark
2004-2006: FRC 1293 (D5 Robotics) - Student, Mentor, Coach
2007-2009: FRC 1618 (Capital Robotics) - Mentor, Coach
2009-2013: FRC 2815 (Los Pollos Locos) - Mentor, Coach - Palmetto '09, Peachtree '11, Palmetto '11, Palmetto '12
2010: FRC 1398 (Keenan Robo-Raiders) - Mentor - Palmetto '10
2014-2016: FRC 4901 (Garnet Squadron) - Co-Founder and Head Bot Coach - Orlando '14, SCRIW '16
2017-: FRC 5402 (Iron Kings) - Mentor
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