German UNICO encoder UNICO model UNICO price

UNICO encoder is a sensor that converts mechanical geometric displacement on the output shaft into pulses or digital quantities through photoelectric conversion. This is currently the most widely used sensor. Photoelectric encoders consist of a light source, an optical code disk, and photosensitive elements. The grating disk has several rectangular holes evenly spaced on a circular plate of a certain diameter. Since the optical code disk is coaxial with the motor, when the motor rotates, the grating disk rotates at the same speed as the motor. A detection device composed of electronic components such as light-emitting diodes detects and outputs several pulse signals. By calculating the number of pulses output by the photoelectric encoder per second, the current speed of the motor can be reflected. In addition, to determine the direction of rotation, the code disk can also provide two pulse signals with a phase difference of 90º.

UNICO Encoder Introduction

A detector that outputs angular data within one revolution of the motor to an external target. Absolute encoders can generally output 360 ° from 8 to 12 bits. Incremental encoders have a disadvantage: they lose the axis position in the event of a power failure. However, for absolute encoders, the axis position is not lost even in the event of a power failure. Various codes can be output, such as binary code and BCD code. Absolute encoders are more expensive, more precise, and larger than incremental encoders. Absolute encoder absolute encoder There are many light channel lines on the optical code disk. Each line is arranged sequentially with 2 lines, 4 lines, 8 lines, and 16 lines. At each position of the encoder, by reading the light and dark states of each line, a unique 2-base code (Gray code) is obtained, ranging from the zeroth power of 2 to the n-1th power of 2. The absolute encoder determines the code based on mechanical position. It requires no memory, no reference point search, and no continuous counting. The position is read whenever it is needed. Absolute encoders have a measuring range and are suitable for use on some special machine tools.

UNICO Encoder Working Principle

The optical code disk of the series absolute encoder has many light channel lines. Each line is arranged sequentially with 2 lines, 4 lines, 8 lines, and 16 lines. At each position of the encoder, by reading the light and dark states of each line, a unique 2-base code (Gray code) is obtained, ranging from the zeroth power of 2 to the n-1th power of 2. This is called an n-bit absolute encoder. Such an encoder is determined by the mechanical position of the optical code disk and is unaffected by power outages or interference. The absolute encoder determines the code based on mechanical position. It requires no memory, no reference point search, and no continuous counting. The position is read whenever it is needed. In this way, the anti-interference characteristics and data reliability of the encoder are greatly improved.

UNICO Encoder Selection Considerations

1) Mechanical installation dimensions: including locating spigot, shaft diameter, mounting hole positions; cable outlet method; installation space volume; whether the environmental protection rating meets requirements. 2) Resolution: i.e., the number of pulses output per revolution when the encoder is operating, and whether it meets the design accuracy requirements. 3) Electrical interface: Common encoder output methods include push-pull output (F type HTL format), voltage output (E), open collector (C, common C is NPN transistor output, C2 is PNP transistor output), and long-line driver output. The output method should match the interface circuit of its control system.

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