What is the encoder and the accuracy of measurement?！

  The encoder is a device the angular displacement or linear displacement into electrical signals. The former is called code disc, the latter known as the yardstick. In accordance with the readout mode encoder can be divided into contact and non-contact two. Contact output using brush, brush contact conductive region or insulating region to represent the status code is "1" or "0"; the acceptance of non-contact sensor is a photosensitive element or magnetic element, when the photosensitive elements through the use of light district and opaque regions to indicate the status of the code is"1" or "0."

  Accordance with the principle can be divided into incremental encoders and absolute categories. Incremental encoder displacement is converted into periodic electrical signals, then converted into electrical signals that count pulse represents the magnitude of displacement by the number of pulses. Absolute encoders at each position corresponding to a certain digital code, so its value is only shown with the beginning and end of the measurement, but not to the middle of the process measurement.

What is the accuracy?

  All measurements are approximate estimates of the "true" value, that value is always the measurement and the "true" value of a certain degree of error, then the size of such an error is commonly referred to as the measurement accuracy, it reflects the measure instrument system
Can truly restore the ability to measure signal value.

What is the accuracy of incremental encoder?

Incremental optical encoder accuracy and resolution has nothing to do, these are two different concepts. Accuracy is a measure of the resolution within the selected range, determining a pulse pulse position relative to the other in any capacity. Accuracy is usually angle, angle or corner points expressed in seconds. Machining accuracy and quality encoder code wheel translucent slits, manufacturing precision factor mechanical spinning of the code disk, but also with installation technologies.

What is the resulotion of incremental encoder?

  Resolution optical encoder output signal is generated by the encoder shaft rotate at a number of basic period represented,That is the number of pulses / revolution (PPR). The number of light transmissive slits code on the disc is equal to the resolution of the encoder, the encoder slit carved more, the higher the resolution of the encoder. In the industrial electric drive, depending on the application object, you can select the resolution usually 500-6000PPR incremental photoelectric encoder, the maximum can reach tens of thousands of PPR. AC servo motor control systems usually use a resolution of 2500PPR encoder. In addition to the photoelectric conversion signal processing logic, multiplier can be 2 or 4-fold pulse signal, thereby further improve the resolution.

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