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Unread 09-01-2013, 03:16
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DampRobot DampRobot is offline
Physics Major
AKA: Roger Romani
FRC #0100 (The Wildhats) and FRC#971 (Spartan Robotics)
Team Role: College Student
 
Join Date: Jan 2012
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Location: Stanford University
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Re: Linear Path Shooter vs. Circular Path Shooter?

In regards to Ether's numbers, at those high speeds, don't trust that you'll get anywhere near no slippage. We ran our belts at a surface speed of about 60 miles per your last year, and it was an unmitigated disaster. Tons of slippage and lack of any speed sensing (or even compensation for voltage changes) led to a shooter that was completely inaccurate. Our two CIM shooter (given, at a large angle) could barely get shots for the key.

When you're designing a shooter, think about what your numbers say and what your testing demonstrates. I really appreciate 2073's testing, especially their result that indicates that lower speeds mean more consistency. But remember, what works for their team (or my team, or robot in three days, or anyone else) may not work for yours. We're prototyping using pneumatic wheels, and have had a lot more success with the straight shooter, for example.
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