The following figure represents a sheet metal folding andstamping system composed of four electro-pneumatic cylinders. Eachof the cylinders contains a solenoid valve, to give forward orbackward order, two magnetic sensors, which indicate whether thecylinder is forward or backward. The system has a button A toindicate whether it is to pierce the plate. The system starts theprocess whenever the operator places the part and then presses thestart button. The desired sequence is shown in the movement diagram(0 - represents a recessed cylinder; 1- represents an advancedcylinder).
The Following Figure Represents A Sheet Metal Folding And Stamping System Composed Of Four Electro Pneumatic Cylinders 1 (53.74 KiB) Viewed 35 times
Problem description:The metal plate is placed manually and is fixed by cylinder 1,which only advances after 10 seconds after the order of the startbutton. Subsequently, cylinders 2 and 3 proceed to bend and,finally, cylinder 4 makes the drilling if Button A is disabled.
a) State what the level 1 and level 2 Grafcet consists of.Explain each of them in detail in the context of thisproblem.b) Build the level 2 Grafcet diagram that meets the requiredspecifications.c) Implement the Ladder diagram program for the studied automatonCPM1 using the instruction “STEP, SNXT”.
Cylinder 2 (bend) Cylinder 3 (bend) Cylinder 1 (fixed to metal sheet) Metal Sheet Cylinder 4 (drill) Cylinder 1 Cylinder 2 Cylinder 3 Cylinder 4 03 0 1 1- 0 Motion Diagram
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