This optical rotary encoder is often used in industrial automation applications to sense rotary motion. When specifying an optical encoder, it’s important that the encoder has extra protection built in to prevent contamination from dust, vibration and other conditions common to industrial environments. Optical encoders are the most accurate of the standard styles of encoders, and the most commonly used in industrial automation applications (Figure 1). The position information can be determined using one of three technologies: optical, magnetic or capacitive.
Regardless of type, all encoders provide a type of orientation that’s used as a reference point for position control.Īn encoder (for industrial controls) is a special sensor that captures position information and relays that data to other devices. They provide information required for the precise control of a variety of applications, such as positioning a rotary table, pick and place, machine assembly, packaging, robotics and more. Please refer to the table below for a simple example of a push-pull output.Updated June 2016 by Lisa Eitel || by Joe Kimbrell, Product manager, Drives, Motors and Motion, AutomationDirectĮncoders are used to determine the position, velocity and direction of motor shaft speed and other mechanical motion. In the off state it will supply a path to ground and in the on state it will supply Vcc. Please refer to the table below for a simple example of an open collector.Ī push-pull output is a combination of a line driver and an open collector. For proper operation, a sourcing input is required. When in the off state, an open collector will float. In the on state, an open collector will supply a path to ground. Please refer to the table below for a simple example of a line driver.Īn open collector is a sinking output. Because of this, a sinking input is required for proper operation. In the off state, a line driver will float. When in the on state, a line driver will supply Vcc. If you are working with an Industrial I/O Card, check the user manual for the best quadrature encoder type.Ī line driver is a sourcing output. The Push-Pull configuration does not float, it is always supplying Vcc or ground, which is why it will work best with a Multifunction DAQ card. SolutionFor most NI DAQ cards, a Push-Pull quadrature encoder is recommended since Multifunction DAQ card works best when it is constantly driven.
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