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Unread 30-01-2013, 10:53
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ToddF ToddF is offline
mechanical engineer
AKA: Todd Ferrante
FRC #2363 (Triple Helix)
Team Role: Mentor
 
Join Date: Apr 2011
Rookie Year: 2011
Location: Newport News, VA
Posts: 599
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Re: 2363 prototype pickup arm

Quote:
Originally Posted by JesseK View Post
If you were to change the pickup funnel so it's not centered, you could hit 2 discs simultaneously and not worry about the first one clearing before the 2nd disc comes in and jams the whole thing.
This was our original idea. If the "funnel" is offset, it has to go over top of the bumpers. Without going into a bunch of the other constraints (non-interference with the shooter, shallow scoop angle), an arm that was long enough to go over the bumpers broke the 54" cylinder when horizontal. With a couple more weeks to tweak, we probably could have made it work. But, this year we are following the motto: Having a good robot early is better than having a perfect robot late.

Quote:
Originally Posted by JesseK View Post
You may also be able to increase the belt speed on that side slightly such that the offset side rollers pull disc #1 in faster, making it clear the intake before the 2nd disc's apex gets in front of it. It's pretty easy to increase the belt linear speed by increasing its drive roller slightly.
This is one of the things we may try, if jamming proves to be a problem. There are many tiny tweaks possible to speed up one side, or slow down the other.
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