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Unread 13-01-2006, 13:54
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Brandon Holley Brandon Holley is offline
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Re: Team 125 Ball Shooter Prototype!

The motor will slow down as soon as contact is made with the ball. We are all assuming that the ball contacting the wheels will have absolutely no effect on the motor, but it does.....actually it effects it ALOT
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Unread 13-01-2006, 14:07
Rick TYler Rick TYler is offline
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Re: Team 125 Ball Shooter Prototype!

Quote:
Originally Posted by MORT~11
The motor will slow down as soon as contact is made with the ball. We are all assuming that the ball contacting the wheels will have absolutely no effect on the motor, but it does.....actually it effects it ALOT
I know we are supposed to be, like, all sekrit and stuff about what we are doing, but this is the biggest reason I like a belt-driven launching system. Combined with an encoder and a high-torque motor system (big CIM, anyone?) I believe a long belt (something like 24") will give more consistent launches -- both in terms of orientation and in velocity. We are prototyping right now, and, if it won't violate the FIRST secrecy oath, I'll share our results when we are done.
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Unread 21-01-2006, 00:01
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Re: Team 125 Ball Shooter Prototype!

Quote:
Originally Posted by DKolberg
with a 6" dia wheel and 2250 rpm you exceeded the max velocity. 2250 with a 6" wheel is 58.90 ft/sec or 17.95 m/sec and the limit is 12 m/sec.
We've been assuming with only one wheel for a shooter, that the calculations are theoretically half of what you calculated. Thus for only one wheel in the configuration you describe we think it might be close to 9 m/sec.

That's our thought anyway. We have a spreadsheet set up that lets you plug in any of two variables (out of three): exit velocity, RPM, diameter of wheel and then see all the other results. I'm happy to send it to anyone who wants it.
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Unread 21-01-2006, 00:07
TEAM456MS TEAM456MS is offline
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Re: Team 125 Ball Shooter Prototype!

One question, how do you plan on aiming during the game with 5 other robots in play?
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Unread 15-01-2006, 19:20
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Re: Team 125 Ball Shooter Prototype!

Brandon get outta here with your 125 bs! Nice videos, I can hear conry in the big air one. We miss you guys. Come back to MO one day.
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