auto control
...peration. There is a similarity between them, which is that the speed of ejecting of the piston is slow while the speed of retracting is fast. However, there are some differences between them, which are stated below: Comparison between the two circuits: Circuit 1: In this circuit, the Variable throttle relief valve which will limit the flow of gas is connected between the rear room of the cylinder and the 5/2-way valve, therefore a supply air throttling is formed. As we switch on the air supply button, air goes in the rear room of the cylinder through the Variable throttle relief valve. Meanwhile, there is no pressure (gauge pressure) in the front room. As the air flows in the rear room slowly, the piston begins to move according to the pressure difference (the difference is around 2 bar in the beginning, because there is also some friction between the piston and the cylinder wall). Since there is no pressure support piston at the front room, the speed of moving is lacking of steady, or even tremble sometimes. Circuit 2: This is a circuit of Exhaust air throttling, the Variable throttle relief valve is connected between the rear room and front room and the port B, so that the air pressure in the rear room will be at maximum point while the pressur...