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Feb 20th, 2020
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  1. The limit switch is a 3/2 roller actuated directional control valve with a spring return mechanism. The one used in the experiment is normally closed. When the roller is actuated, the air path is connected allowing air to pressurize in the outlet terminal.
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  3. The single pneumatic actuated cylinder with spring return – the rod extends when the air is pressurized in the inlet. When the air pressure is released, the rod retracts in the original position due to the spring return mechanism.
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