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Unread 05-01-2016, 09:07
aldaeron aldaeron is offline
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AKA: -matto-
FRC #1410 (Kraken)
Team Role: Mentor
 
Join Date: Jan 2010
Rookie Year: 2010
Location: Denver
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Re: Sonic Shifter - recent feedback?

Quote:
Originally Posted by BoilerMentor View Post
The decision was based not on pushing power, but a time to distance calculation that considered a two speed transmission. That pair of ratios minimized field crossing timed on a tool that was written up in Excel taking the two speed gearbox into account. People perceived 1747's robot as being tippy that year, specifically because of the brutal acceleration this setup generated. It was the one thing we didn't take into account and actually down-regulated our peak acceleration. No doubt the robot was quick across the field though. I personally think time to distance is an important consideration most teams neglect, but there are certainly some games where it's not a useful piece of data i.e. 2015.
I agree with you that this can be an important parameter and we do calculate it, but it is game dependant. Sometimes that few tenths of a second gets you a game piece or allows you to avoid a defensive hit. There is always a lof of discussion on free speed, but I think time to X feet is a more relevant metric. Simbotics talks about it in their videos on strategic design and drivetrain design.

Thanks for the details on the design and fixes. Since we have never geared that aggressively, it is good to know some of the pitfalls in case we ever want to.

-matto-