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Unread 03-02-2011, 12:22
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Chris Fultz Chris Fultz is offline
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Re: Pistons only halfway up

<R74> Each commanded motion of a pneumatic cylinder or rotary actuator must be accomplished via the flow of compressed air through only one approved pneumatic valve. Plumbing the outputs from multiple valves together into the same input on a pneumatic cylinder is prohibited.

Followup to above post. Based on the wording in this rule, I believe it is acceptable to use a set-up like in the sketch, and to use a 3 position (or more) cylinder. The key wording is that you cannot have multiple valves on the same input.
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