In 2004 177 used vacuum to power all the typically pnuematic systems on our robot (shifters, etc.). We made our pump using a pnuematic cylinder from the kit, a sprocket modified to act as an eccentric, and several check valves to prevent backflow and allow us to draw a vacuum on both strokes. Oh and our frame was the accumulator.
I would also like to point out that 2004 was the only year that this was legal because we were allowed to use the solenoids on the vacuum systems that year. The way the rules read now you can't do this.
Pete
__________________
2011 Championship Finalists/Archimedes Division Championships w/ 2016 & 781
2010 Championship Winners/Newton Division Champions
Thank-you 294 & 67
2009 Newton Division Champions w/ 1507 & 121
2008 Archimedes Division Champions w/ 1124 & 1024
2007 Championship Winners/Newton Division Champions w/190, 987 & 177 The Wall of Maroon
2006 Galileo Division Champions w/ 1126 & 201
www.bobcatrobotics.org
"If you can't do it with brains, it won't be done with hours." - Clarence "Kelly" Johnson