L e a v i n g C e r t i f i c a t e Technology. Pneumatics Practical Circuit Building. t 4 Galway Education Centre 0

Transcription

1 L e a v i n g C e r t i f i c a t e Technology Pneumatics Practical Circuit Building t 4 Galway Education Centre 0

2 1. Identify the components on the SMC Kits. Shuttle Valve Pressure Regulator & double s Compressor 3/2 Lever s Manifold Two pressure Flow control s 3/2 Pushbutton s Solenoid s Pneumatic Pilot s 2. Familiarise yourself with the Pneumatic ports nomenclature. (No standard nomenclature, Letters and Numbers used, we are keeping to the Number system to avoid confusion? SMC kits use Letter system.) Number of Ports. Number of Positions Number of Ports. Number of Positions 3/2 Way directional control normally closed 5/2 Way directional control 3/2 Way directional control normally open 1 t 4 Galway Education Centre

3 3. First simple circuit, 3/2 Pushbutton with a single acting actuator. Spring return. Compressed Air Supply 4. speed control using a 3/2 Pushbutton with a single acting actuator and flow control. Spring return. Flow control t 4 Galway Education Centre 2

4 5. Second circuit, a 3/2 pushbutton, a 5/2 Pilot controlled pneumatic and a double acting actuator. Double acting actuator 5/2 Pilot supply 3/2 Push Button Valve 6. Double acting actuator speed control using a 3/2 pushbutton, a 5/2 Pilot controlled pneumatic and two flow control s. (Demonstrates how the piston speed may be different on the in and out strokes.) Double acting Flow control s 5/2 Pilot 3

5 Logic circuits. 7. The OR Logic circuit using two 3/2 pushbutton s, a shuttle and a single acting actuator. Spring return. Shuttle 8. The AND circuit using two 3/2 pushbutton s, a two pressure and a single acting actuator. Spring return. Two pressure 4

6 9. Semi automatic circuit using a 3/2 pushbutton control, a 3/2 roller lever, a 5/2 pilot, a single and a double acting actuator. Double acting actuator 3/2 roller Lever actuator 5/2 Pilot 3/2 Pushbutton 10. Fully automatic circuit using a 5/2 Solenoid control, a Single and a Double acting actuator. Control is achieved using a feedback signal to the PIC Logicator interface board and Software. Power supply cable Programming cable from Laptop Input to PIC control board from Reed Output from PIC control board to Solenoid Double acting actuator PIC Control Programme 3/2 Roller lever Pneumatic control T piece supply Manifold 5 5/2 Solenoid Control Reed switch

7 Fully Automatic Pneumatic Circuit supply Proximity Switch operated by Proximity 3/2 roller lever Double acting Solenoid Power supply signal 5/2 Solenoid supply Simple PIC Logicator Control programme for the Automatic circuit. The programme starts and goes to the decision box, checks to see if Input 7 is High. If it is low it goes around the right hand loop and checks again until it gets a High. When Input 7 is High, it makes Output 1 High. It then waits 1 second and makes Output 1 low. It follows to loop around to the top of the decision box and checks again for the next cycle. This simple programme switches on and off the Solenoid controlling the flow of compressed air to the. 6