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You could have a switch located in a good spot on your vacuum pump assembly. When the cam rotates to a certain point the switch will be pressed. Then have the RC control a solenoid whenever the switch is pressed. Not too hard I suppose.
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Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
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