Page 20 of Buckeye Pneumatic Fixtured Drills by Cooper Power Tools

self-feed air tool circuitry multiple 800 series tools with cycle completion circuit sequence of operations momentarily depressing manual 3-way valve pressurizes the start signal inlets of the 800 series tools thus starting the tools and exhausting the cycle completion signal outlets self-feed air tool circuitry multiple 800 series tools with clamping cylinder sequence of operations momentary depression of start valve pressurizes the b signal port of the 4-way valve thus shifting it to operate the clamping cylinders an air line leading from the clamp side of these cylinders sends pressurized air to the inlet port of the tool operation sequence valve this normally open 3-way valve has the timed operator set for a time delay on operation thus when pressure is applied to the inlet port the valve remains open at the same time air is metered through the sequence head after the preset delay inlet closes and outlet opens to exhaust this action sends a momentary pressure to the start signal inlet of the self-feeding tools thus starting their cycle of operation when the tools return to their fully retracted position a continuous pressure is sent from the cycle completion assembly to the operators of their respective 3-way air operated valves as the last tool is completely retracted the pressurized air series circuit is again open pressurizing the inlet of the clamp release valve this too is a normally open 3-way sequence valve that sends a momentary signal thru it when its inlet is pressurized the outlet of the clamp release valve is connected to signal port a of the 4-way valve when this outlet is momentarily pressurized it returns the 4way valve to its normal position where air is exhausted from the clamp side of the clamping cylinders and air is sent into the release side thus releasing the clamp required description required description component list 1 one for each tool 1/4 6.4mm 3-way normally closed palm button operated valve 1/4 6.4mm 3-way normally closed air operated valve component list 1 per tool 2 1 1 3-way n.c air operated 3-way n.o timed-in sequence 4-way double air momentary 3-way n.c start 34 35

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