POLITEKNIK SULTAN AZLAN SHAH

PNUEMATIC AND HYDROLIC

REPORT LAB 1

SUBMISSION DATE : 7 OCTOBER 2014

LECTURE NAME : PUAN MAI NOOR ASIAH BINTI TAN ZALILAH

NAME NO MATRIK

EDY BIN MOHD 15BAD11F2022

MUHAMMAD MUADDID BIN MANSOR 15BAD11F2008

MUHAMMAD ZAFRIE 15BAD11F2037

TOPIC

SEQUENTIAL CONTROL OF 2 DOUBLE ACTING CYLINDER WITHOUT OVERLAPPING SIGNALS

OBJECTIVES

At the end of the session the students will be able to :

I. Apply safety rules in the laboratoryII. Design pneumatic circuit using a sequential control of two double acting cylinders

without overlapping signals and with overlapping signalsIII. Differentiate between sequential control without overlapping signals and with

overlapping signals

SEQUENTIAL CONTROL

Many pneumatic systems and machines are designed to perform a range task in a certain order sequence. This usually involves the use of two or more cylinders working together to complete the task. The movement of these cylinders are coordinated as per the required sequence. This sequencing is carried out by actuation of appropriate final control valves like directional control valves. The position of the cylinders is sensed by sensors like limit switches, roller or cam operated valves.

EQUIPMENT

I. Double acting cylinders

II. 5/2 ways directional control valve, impulse valve

III. One way flow control valve

IV. 3/2 directional control valve with push button

IV. 3/2 directional control valve with roller

SAFETY

Build your designs and verify your operation. Make sure that the pressure is 4 bars and is connected correctly. Double check your connections before switching the compressor on.

OPERATION

I. The workpiece coming in on the right roller conveyor should be elevated and sent in a new direction.

II. After actuating the start button the piston of cylinder A raises the workpiece to the height of the second roller conveyor with its elevating platform.

III. Cylinder A remains in this position until cylinder B has pushed the workpiece from the elevating platform onto the upper roller conveyor.

IV. When cylinder A has securely pushed all the workpiece onto the upper roller conveyor, cylinder A moves down again.

V. Only when cylinder A has retracted into its lower end position does cylinder B also retract.

VI. The working speed of both cylinders is infinitely adjustable in both directions.

PROCEDURES

Simulation

Assembling the circuit

1. Prepare the components according to the above components list.2. Mount all components according to the pneumatic circuit.3. Connect pneumatic tubes according to the pneumatic circuit.4. Check that all parts are connected properly and firmly with each other.5. Switch on the service unit and start the circuit.6. Check the operation of the circuit for any malfunctions.7. Turn of the sevice unit.8. Dismantle and tidy up.9. Write dowm your observation.

RESULT

REFERENCES

• Book

L.Zipfinger (2002). Practice for Professionals Pneumatic Trainer’s Manual. Germany: Bosch Rexroth