Introduction to Industrial Automation

Figure 5.23  A ball separation arrangement with pneumatic circuit and components (a), and an 

automation circuit (b).

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  Introduction to Industrial Automation

The valves were selected to be of a four-way, two-position type, each with one solenoid. Thus, the 

automation circuit will be simplified (fewer solenoids, three instead of six, in the case of four-way, 

three-position valves).

The automation circuit of the stamping machine must be designed in order to obtain the fol-

lowing functionalities:

  1. To fulfill the diagram of positions or steps shown in Figure 5.24b.

  2. The overall operation of the machine must be initiated by pressing a START button and 

continue without interruption

  3. The operation of the machine should stop if a STOP button is pressed from the operator, or 

if the objects for stamping are over in the feeder. In both cases, if the STOP function takes 

place in the middle of the stamping cycle, the stamping operation should be integrated, and 

then the machine should be returned to its rest position.

According to the previous considerations, the specific application automation circuit is dis-

played in Figure 5.25. In cases of complicated applications with multiple cylinders and a large 

 

b

a

Cylinder A

d

e

c

Cylinder B

f

g

Cylinder C

M

Coil A

Coil B

Coil C

(a)

Stamping machine and pneumatic circuit of three cylinders

(b)

Displacement-step diagram of three cylinders

1 

2 

3 

4 

5 

6  7 = 1 

A

B

C

Steps