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Unread 03-12-2012, 21:31
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FRC #1718 (The Fighting Pi)
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Re: Behind The Design 2012

Quote:
Originally Posted by Adam Freeman View Post
Ether,

I believe the plot was a theoretical calculation of motor RPM v. time that one of our engineers created to help us determine what gear ratio we wanted to use for our shooter gearbox. The data showed that the 2.5:1 ratio was the fastest to reach 4000RPM, which is what targeted for our "normal" shooting speed.

The 8000RPM free speed is a typo on my part. It should be more like 6400RPM.

I pointed our controls guys to this thread. He will answer the control algorithm question.
Remarkable. That is the exact same compression, gearing, and speed that we had. After our second competition we switched from 775's in a custom Cim-Sim over to 550's in a banebot gearbox due to poor alignment (our fault) in the gears of the Cim-Sim. Our gear ratio, compression and shooting RPM still stayed the same though. I wonder how many other teams came to the exact same solution.
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