Quote:
Originally Posted by 1075guy
We used an elaborate system of valves to gain much control over our airflow. We controlled the feed side, as well as the exhaust side, and used some fancy code to switch them quickly in such a fashion that avoided any 'drifting' phenomena as well as any oscillations.
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Team 612 made a multi-position pneumatic arm in the off-season between 2005 and 2006 just to see if they could do it. They designed the valve system by referencing ChiefDelphi quite heavily. I know that they controlled the exhaust side to stop the arm in various mid-positions, like this:
The arm was plagued by drifting and oscillations, as described above. Eliminating lots of excess tubing partly solved the "bounciness" problem.