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Unread 27-03-2011, 15:45
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Mike Betts Mike Betts is offline
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Re: Solution: Variable position of cylinder in compliance with <R74>

Quote:
Originally Posted by Roboman01 View Post
Trapped air that is not pressurized beyond atmospheric pressure is legal, to my knowledge. The only thing that is making the arm difficult to move is the vacuum generated inside the cylinder, since the check valves prevent air from entering the system. The extra push buttons let air into the cylinder. Vacuums are not subject to the rules governing pneumatic systems, according to <R66>, part G. Once the vent plug valve is open, any positive pressure created by the movement of the arm is exhausted as it is created, through the check valves, and the only pressure that exists is negative (vacuum).
Yes, vacuum systems are exempt but you are talking about a hybrid pneumatic/vacuum system. Therefore, the system would almost certainly be considered pneumatic by an inspector.

Also, check valves are not legal this year.

JMHO,

Mike
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Mike Betts

Alumnus, Team 3518, Panthrobots, 2011
Alumnus, Team 177, Bobcat Robotics, 1995 - 2010
LRI, Connecticut Regional, 2007-2010
LRI, WPI Regional, 2009 - 2010
RI, South Florida Regional, 2012 - 2013

As easy as 355/113...