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Re: pic: Team 2607 - 2016 Robot
The puncher operates through two carriages that ride on linear bearings. The back one (retract carriage) is driven by a leadscrew across the length of the puncher. The front one (puncher carriage) has a bolt for the retract carriage to grab on its back, a puncher rod on its front, and surgical tubing for stored energy on its front as well.
The whole sequence involves running the retract carriage forward, pneumatically grabbing the puncher carriage, and then pulling it back, stretching the surgical tubing. The retract carriage then pneumatically releases the puncher when we want to fire.
The first scene in the reveal video is from the underside of the arm and showcases the whole mechanism. I dont actually have a number for the force at max stretch, but I would estimate it is about 100lbs (using 8 surgical tubes). Using that many, we stretch the bands to about 240% original length, which should let them last much longer than exceeding 300%.
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2016 MAR DCMP Engineering Excellence Award
2016 MAR Westtown Innovation in Control Award
2016 MAR Hatboro-Horsham Industrial Design Award
2015 Upper Darby District Winners - Thanks 225 and 4460!
2015 Upper Darby District Industrial Design Award
2015 Hatboro-Horsham District Winners - Thanks 2590 and 5407!
2014 Virginia Regional Winners - Thanks so much 384 and 1610, I will never forget that experience!
2014 Virginia Quality Award
2014 MAR Bridgewater-Raritan Innovation in Control Award
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Last edited by dellagd : 04-03-2016 at 13:20.
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Remember that though we come from different backgrounds and x, y, z, we are all on each other's side. We want people to love STEM, and think FIRST is a great tool to fulfill that desire. - PayneTrain [more] 
04-03-2016, 13:13
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