After Season Projects

[dw2364]

Originally Posted by JakeGallagher

Thanks for the clarification...I'm horrible with remembering the team numbers. Do you think you guys could send us some pictures and/or the system specs for your bocce mechanism?

I have posted pictures of the bocce shooter and they can be found at:
http://www.chiefdelphi.com/forums/pi...gle&picid=7467
http://www.chiefdelphi.com/forums/pi...gle&picid=7466
http://www.chiefdelphi.com/forums/pi...gle&picid=7465

More information will also be posted on the teams website shortly.If anyone wants more information please let me know.


The Bocce shooter
It consists of 3 wooden channels, one for the ball which is 5” wide and two smaller 3” channels in either side to hold the 4 bungees. And a metal block that rides along the inner channel that pushes the ball. It started off as just one wooden block that pushed the ball, with no motors. This was used to first see if it could launch the ball, and after a successful trial, it was then worked on to incorporate motors and switches. It was complicated, to first figure out how to pull the block back, and figured out that a lead screw would work the best. It is locked into the motor and on one end, and to the block at the other. As it turns, it slowly uses the torque from the motor to pull back the block. The lead screw works best, in that it takes a lot of force off of the motor and is thus able to pull the block back. The next problem to figure out was how to release the block from the screw and motor so that the bungees could take over and shoot the ball. This was accomplished by using 2 separate blocks, one that pushes the ball, and one that is attached to the screw. By putting a motor on the one that is attached to the screw, and putting a hook attached to the motor shaft that hooks into the other block, someone could hit a button to release the two blocks. 2 square tubes are attached to the shooter and special mounts that go onto the wheel chair. Tubes attach these two pieces thus allowing for a shock mechanism. Four casters were mounted on the bottom of the shooter for mobility.

-Two switches are used to control the bocce shooter. One moves it back and forth and the other is used to move the hook which releases the two blocks.