Today computer-based controllers, particularly PLC (Programmable Logic Controller) have replaced most relay-based systems. A programmable controller can be studied by considering the basic elements: the processor, the input/output modules, and the Software. Operation of the programmable controller can be considered in two modes, the I/O scan mode and the execution mode. <Read in Full>
Introduction To PLC Programming Since PLC was invented in the late 60s, several basic instructions used for PLC programming were widely used. The most commonly used one is the ladder diagram. With the improvement of new products came new, more versatile instructions. These new instructions provided back more power for the PLC. Developments of powerful I/O modules also introduced changes to the existing new instructions. Today’s PLC instructions are mainly based on the ladder diagram together with modifications from various vendors with new functions added to the ladder diagram… <Read in Full>
Introduction to CNC Computer numerical control (CNC) is the process of manufacturing machined or processed parts in a production environment, as controlled and allocated by a computerized controller that uses motors to drive each axis. The controller actually controls the direction, speed, and length of time each motor rotates. A programmed path is loaded into the machine's computer by the operator and then executed… <Read in Full>
