Questions and Answers
What might a control system for an automatic drilling machine be required to do?
Start lowering the drill when the workpiece is in position, start drilling when the drill reaches the workpiece, stop drilling when the drill has produced the required depth of hole, retract the drill, and then switch off and wait for the next workpiece
What could be the inputs to control systems like the one used for the automatic drilling machine?
Switches being closed or opened, such as the presence of the workpiece indicated by it moving against a switch and closing it
What might another control system (Figure 1.1b) be used to control?
The number of items moving along a conveyor belt and directing them into a packing case
What could be an example of an input to a control system according to the text?
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What is the form that a controller for an automatic drilling machine could have according to the text?
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What is the role of a programmable logic controller (PLC) in controlling an electromechanical system?
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Which component of a PLC is responsible for processing the input signals and executing the control logic?
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In the context of controlling electromechanical systems, what is the purpose of ladder logic programming in PLCs?
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In a control system, what is the purpose of a feedback controller?
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What programming method is still in use for PLCs in logic control systems?
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Which type of control system uses software logic, such as in a programmable logic controller (PLC)?
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What is the role of a microcontroller in logic control systems for industrial and commercial machinery?
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What is the purpose of interconnected electrical relays and cam timers historically used in logic control systems for industrial and commercial machinery?
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