Question

You must design a two button safety interlock system for and automated press machine to cut rubber gaskets out of a .25 inch thick piece of rubber. To prevent the operator from inadvertently cutting off his hand, you arrange a system where both buttons must be depressed at the same time to actuate the cutting cycle. In this system, the buttons are on either side of the press so it is impossible to activate the buttons with ones elbows. Write the truth table, Boolean logic and a ladder diagram for this system.

Answer 1