Exp. 3 Electro Pneumatics Control Technology

Deign of Hydraulic and Pneumatic System Lab

Lab Experiments Control of Hydraulic and Pneumatic System Lab

Objective: This exercises conveys basic knowledge and skills on setting up and commissioning an electro pneumatic control using the example of a direct electric activation of a single acting cylinder.

Pre-Lab: the required pneumatic circuit diagrams using the automation studio SW; show the whole connections and components required for each circuit.

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

Aim: This exercise demonstrates the control of a double-acting cylinder with an electrically

controlled, spring return 5/2 directional control valve without the use of a relay.

List of equipment:Description:

- (04) Double-acting cylinder, with annular solenoid- (32) 5/2 directional control impulse valve, electrically controlled- (37) Unit, 1 control switch, 2 push buttons- (50) Power supply unit- (42) Unit, electric manifold- (01) Pneumatic air service unit- (02) Compressed air distributor

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University Of Jordan Faculty of Engineering & Technology Mechanical Engineering Department Control of Hydraulic & Pneumatic System Lab Experiments No.3 Electro

pneumatics Control Technology

Part I: Command-variable control of a double acting cylinder

Pre-Lab

Lab Experiments Control of Hydraulic and Pneumatic System Lab

Procedure Connect the circuit shown in Figures 1 and 2.

Figure 2: Electric circuit diagram Figure 1: Pneumatic circuit diagram

Conclusion: - The double-acting cylinder can be directly controlled by a ________________________.

- In the basic setting (spring position) of a directional valve, port 1 supplied with________________, port 2 is always __________ , port 4 always________________ and port 5 and 3 are always __________________________________ .

- Start the system by pressing S1 momentarily assuming that the switch S0 is on , step what the system do: ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

- What the initial or center position for (32) 5/2 directional control impulse valve, electrically controlled

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Lab Experiments Control of Hydraulic and Pneumatic System Lab

__________________________________________________________________________________________________________________________________________________

Aim: This exercise conveys knowledge on the application of relays in electro pneumatic

controls. The valve solenoids are controlled through relay contacts and not directly through the signaling elements.

List of equipment:Description:

- (04) Double-acting cylinder, with annular solenoid- (32) 5/2 directional control impulse valve, electrically controlled- (37) Unit, 1 control switch, 2 push buttons- (34) Relay unit 4 changeover contacts- (50) Power supply unit- (42) Unit, electric manifold- (01) Pneumatic air service unit- (02) Compressed air distributor

Figure 3: Pneumatic circuit diagram

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Part II: Holding element control of a double acting cylinder

Lab Experiments Control of Hydraulic and Pneumatic System Lab

Figure 4: Electric circuit diagramProcedure

Connect the circuit shown in Figures 3 and 4.

Conclusion:

- Start the system by pressing S1 momentarily, step what the system do: ____________________________________________________________________________________________________________________________________

- pressing S2 momentarily, step what the system do: ____________________________________________________________________________________________________________________________________

- what the different between part one and two __________________________________________________________________________________________________________________________________________________

Aim: This exercise the various possible circuits with latching (storage circuits) in relay

technology are demonstrated.

List of equipment:Description:

- (04) Double-acting cylinder, with annular solenoid

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Part III: Basic Circuit with electric latching circuit

Lab Experiments Control of Hydraulic and Pneumatic System Lab

- (31) 5/2 directional control impulse valve, electrically controlled, spring return- (37) Unit, 1 control switch, 2 push buttons- (34) Relay unit 4 changeover contacts- (50) Power supply unit- (42) Unit, electric manifold- (01) Pneumatic air service unit- (02) Compressed air distributor

Procedure A. Connect the circuit shown in Figures 5 and 6.

Figure 5: Pneumatic circuit diagram

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Lab Experiments Control of Hydraulic and Pneumatic System Lab

Figure 6: Electric circuit diagram

Conclusion:

- Start the system by pressing S1 momentarily assuming that the switch S0 is on , step what the system do: ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

- what the different between part two and three _______________________________________________________________________________________________________________________________________________

Procedure B. Connect the circuit shown in Figures 7.

Figure 7: Electric circuit diagram (dominant "off")

Conclusion:

- Start the system by pressing S1 momentarily assuming that the switch S0 is on , step what the system do: ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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Lab Experiments Control of Hydraulic and Pneumatic System Lab

Aim: Cylinder switches and an electrically controlled 5/2 directional control impulse valve are

used in this displacement- dependent control of a double-acting cylinder.

List of equipment:Description:

- (04) Double-acting cylinder, with annular solenoid- (32) 5/2 directional control impulse valve, electrically controlled- (15) one way flow control valve - (37) Unit, 1 control switch, 2 push buttons- (34) Relay unit 4 changeover contacts- (38) Cylinder switches - (50) Power supply unit- (42) Unit, electric manifold- (01) Pneumatic air service unit- (02) Compressed air distributor

Procedure A. Connect the circuit shown in Figures 8 and 9.

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Part IV: Displacement dependent control of a double acting cylinder

Lab Experiments Control of Hydraulic and Pneumatic System Lab

Figure 8: Pneumatic circuit diagram Figure 9: Electric circuit diagram

Conclusion:

- Start the system by pressing S0 momentarily , step what the system do: ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

- Design the functional diagram (stroke-time diagram) for the cylinder and the 5/2 directional control valve.

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Lab Experiments Control of Hydraulic and Pneumatic System Lab

Aim: This exercise demonstrates a displacement-dependent sequential control with 2 double-

acting cylinders without signal overlapping.Signaling elements are electric cylinder switches with proximity switching (magnetic field sensors), electrically controlled 5/2 directional control impulse valves are used as actuators.

List of equipment:Description:

- (04) Double-acting cylinder, with annular solenoid- (32) 5/2 directional control impulse valve, electrically controlled

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Part V: Sequential control of a 2 double acting cylinder

Lab Experiments Control of Hydraulic and Pneumatic System Lab

- (15) one way flow control valve - (37) Unit, 1 control switch, 2 push buttons- (34) Relay unit 4 changeover contacts- (38) Cylinder switches - (50) Power supply unit- (42) Unit, electric manifold- (01) Pneumatic air service unit- (02) Compressed air distributor

Procedure:- After actuating control limit switch S1, the piston rod of a double-acting cylinder (Z1) is

extends and after reaching the front end position, the piston of a double-acting cylinder (Z2) is extends and after reaching the front end position the piston of a double acting cylinder ( Z1 ) retracts when fully retract cylinder ( Z1 ) the piston of cylinder ( Z1 ) retracts.

- This Procedure repeats itself as long as switch S1 remains ON. - Additional requirements: add two push button S0 and S2, after briefly actuating S0 the

cylinder start the process, after actuating S2 the cylinder stop.- It should be possible to reduce the extension speed.- Drawing the circuit diagram with symbols and port symbols - Drawing the Electric circuit diagram with symbols and port symbols.

Pneumatic circuit diagram

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Lab Experiments Control of Hydraulic and Pneumatic System Lab

Electric circuit diagram 1

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