The basic concepts of a relay control system and a PLC control system are highlighted in this article with the help of a circuit diagram. Assume that an electro-pneumatic system is used to obtain an industrial work operation. The system consists of a pneumatic power part and an electrical control part. The electrical control part... Continue Reading →
How to Develop Multiple-actuator Pneumatic Circuits Using the Cascade Method?
Most practical pneumatic systems involve multiple actuators (cylinders, semi-rotary actuators, etc.), which carry out the desired control tasks when operating in specified sequences. Double-pilot directional control (DC) valves are used as final control elements to control the forward and return strokes of the actuators. Sensors are used to confirm the actuator positions and provide signals... Continue Reading →
Relay-based Electro-hydraulic Systems
In the electrical actuation of a hydraulic valve, the necessary actuating force is obtained electrically with the help of a solenoid. The off-centre core of the solenoid coil is pulled towards the centre of the coil when the electric current is passed through it. This discrete movement of the core is used to actuate the... Continue Reading →