2/28/2023 0 Comments Plc motor encoder proximity sensor![]() ![]() This pulse train may go to a PLC, which can use it to determine how fast the shaft is moving. When the sensor detects the keyway, it provides an output, basically pulsing every time the keyway goes by. As the shaft turns, the keyway comes in and out of the sensor's field of view. If there's a keyway on the shaft, a proximity sensor can clock how fast it is rotating to determine shaft speed. For these situations, proximity sensors can provide an alternative. Occasionally, an encoder has more functions and capabilities than an application needs. ![]() Inherent in this function, though, is the ability to detect motion, allowing such devices to meet the needs of a range of motion applications, including a few where encoders are the first thing that comes to mind. They are not as well suited to discerning whether objects are moving along a conveyor.įor these and other such applications, proximity sensors are a better choice, having the ability to detect the presence or absence of objects. ![]() However, these devices detect a specific kind of motion, such as how far an axis moved or how many revolutions a shaft has spun. Among engineers, encoders are most often associated with the detection of motion. If you answered "encoders" or "resolvers," you have plenty of company. Name a device you can use to measure motion. ![]()
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