PLC (Programmable Logic Controler) TK3434 Minggu 2 : Introduction of Pneumatic Simon Siregar, S.Si., MT. Ganjil 2013/2014 Hanya dipergunakan untuk kepentingan pengajaran di lingkungan Politeknik Telkom

Topic Outline: Double acting cylinder Rodless cylinder Pneumatic Valves Direct control valves & Symbols Latihan

DOUBLE-ACTING CYLINDERS Stroke Length 100mm (max)

PistonRod ConnectionsBase endRod end Seals Bearing Wiper Part of single acting cylinder

Double Acting Cylinders with Air Cushioning When the piston approaches its final position, the damping piston shuts off the direct air-outlet. Excess pressure sets up an air-cushion in the remaining cylinder volume and kinetic energy is converted into pressure. At this stage, air may only leave the cylinder through a controlled cross section of stream discharge.

Operation of Double Acting Cylinders with Air Cushioning Cushioning sleeves Cushioning adjustment Seals Non-return valve

Mechanically coupledMagnetically coupled Rodless cylinders or Linear Drives are used when long strokes are required or little fitting space is available. Rodless Cylinders

Conventional Double Acting Cylinders require space to house the cylinder. Plus space to carry out the work. More effective use of the available space can be made by using Rodless Cylinders

PNEUMATIC VALVES FUNCTIONS : èopen and close flow paths èregulate pressure èdirects flow to various paths èadjust flow volume

SWITCHING SYMBOLS FOR VALVES The valve switching position is shown by a square. The number of squares corresponds to the number of switching position. Lines indicate the flow paths, arrows indicate the direction of flow. Closed ports are shown by two lines drawn at right angles to one another. The connecting lines for supply and exhaust air are drawn outside the square.

Ports and Switching Position Number of ports Number of switching positions 2/2 – way valve, normally open position 3/2 – way valve, normally closed position 3/2 – way valve, normally open position 5/2 – way valve, flow from 1-2 and from

Actuation methods MANUAL MECHANICALELECTRICAL PNEUMATIC General Push Button Lever Pedal Detent Spring Button Roller Idle Roller SolenoidPneumatic ? ?

Latihan Gambarkan sistem pneumatic lengkap dengan menggunakan fluid sim menggunakan 2 buah single acting cylinder dan 2 buah double acting cylinder dan sensor.

FESTO DIDACTIC, University of Sto.Tomas FESTO DIDACTIC, Pneumatic – Tingkat Dasar P111 REFERENCE