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Unread 22-01-2012, 19:00
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Re: FRC488 Pneumatic Catapult

Quote:
Originally Posted by CalTran View Post
Interesting. I like the use of tupperwear on the robot Is there a system for changing the distance you can shoot from? Also, is there a cap on the amount of successive shots you can take? You were shooting fairly rapidly from what I saw in the video.
The tupperware is, I hope, a temporary solution.

We plan on varying the flow rate to the actuators. We haven't quite nailed down an implementation yet, but we think we can do it pretty easily.

In our testing, we were able to manually adjust the flow and got similar consistency from the fender out to about 22'. The concept is sound, we just need a mechanical solution that is repeatable.

The robot was on shop air for the video. We'll need to figure out how much stored air we'll need on board for a reasonable firing rate. I don't expect will see 9 balls in 30 seconds during a match, but who knows.

Quote:
Originally Posted by SenorZ View Post
Cool. Looks like it takes up a lot of space though.
It is very big. We need to rework some of the mounting to make it a smaller package, but we can fit the important parts into a robot with room to spare.

Quote:
Originally Posted by squirrel View Post
That's neat! Yeah, it is nice to see something different, especially when it works so well
We've found that the compressability of the balls varies greatly and so our wheeled shooters couldn't provide the same sort of consistency. We'd get the same result from the same ball each time, but each ball would travel a different distance.
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