German Johannes Huebner encoder Johannes Huebner model Johannes Huebner price

Johannes Huebner encoder is a new type of angle or displacement measuring device. Its principle is to use magnetoresistive elements to measure the angle or displacement value of changing magnetic materials. Changes in the angle or displacement of the magnetic material cause changes in resistance or voltage, which are processed by a microcontroller to output pulse signals or analog signals for measurement purposes. Concentric code tracks extend from the center of the magnetic encoder disk outward to the edge of the disk, with each layer having twice as many sectors as the inner layer. The first layer has only one transparent sector and one opaque sector; the second layer at the center has two transparent sectors and two opaque sectors; while the third layer has four transparent sectors and four opaque sectors. The built-in sensor head is compact, suitable for small installation spaces, and features a high protection rating design, making it suitable for harsh environments. In industrial applications, it avoids the sensitivity to pollution typical of optical encoders, increasing long-term system stability.

Johannes Huebner encoder installation and usage

Absolute rotary encoders can be mechanically installed in various ways, such as high-speed end installation, low-speed end installation, and auxiliary mechanical device installation. High-speed end installation: Installed on the drive motor shaft end (or gear connection). The advantage of this method is high resolution. Since multi-turn encoders have 4096 turns, and the motor rotation falls within this range, the full range can be utilized to improve resolution. The disadvantage is gear backlash error during reciprocating motion after passing through reduction gears, so it is generally used for unidirectional high-precision control positioning, such as roll gap control in steel rolling. Additionally, when the encoder is directly installed on the high-speed end, motor vibration must be minimal to avoid damaging the encoder. Low-speed end installation: Installed after the reduction gear, such as on the shaft end of a hoist wire rope drum or the last stage of the reduction gear shaft. This method eliminates gear backlash, provides more direct measurement and higher accuracy. It is generally used for long-distance positioning measurements, such as in various lifting equipment and feed cart positioning. Auxiliary mechanical installation: Common methods include rack and pinion, chain and belt, friction wheels, and rope retraction mechanisms.

Johannes Huebner encoder categories

An absolute encoder is a sensor that directly outputs digital signals. Its circular code disk features several concentric code tracks along the radial direction. Each track consists of alternating transparent and opaque sectors. The number of sectors in adjacent tracks follows a double relationship. The number of code tracks on the disk corresponds to the number of bits in its binary code. A light source is located on one side of the disk, and a photosensitive element corresponding to each code track is located on the other side. When the code disk is at different positions, each photosensitive element converts the presence or absence of light into corresponding level signals, forming a binary number. This type of encoder does not require a counter; a fixed digital code corresponding to the position can be read at any position of the rotating shaft. Obviously, the more code tracks there are, the higher the resolution. For an encoder with N-bit binary resolution, its code disk must have N code tracks. Absolute encoders use natural binary or cyclic binary (Gray code) methods for photoelectric conversion. The difference between absolute encoders and incremental encoders lies in the transparent and opaque line patterns on the disk. Absolute encoders can have several coding schemes, and the absolute position is detected by reading the code on the disk. Coding designs can adopt binary code, cyclic code, two's complement binary code, etc. Its characteristics are: 1.2.1 the absolute value of the angular coordinate can be read directly; 1.2.2 there is no cumulative error; 1.2.3 position information is not lost after power cutoff. However, the resolution is determined by the number of binary bits, meaning accuracy depends on the number of bits. Currently, there are various types such as 10-bit and 14-bit.

Johannes Huebner encoder wiring method

A rotary encoder is a photoelectric rotary measuring device that directly converts measured angular displacement into digital signals (high-speed pulse signals). Encoders are classified by signal principle into incremental encoders and absolute encoders. We typically use incremental encoders, where the output pulse signals from the rotary encoder are directly input to the PLC, and the PLC's high-speed counter counts these pulse signals to obtain measurement results. Different models of rotary encoders have different output pulse phases. Some rotary encoders output three-phase pulses A, B, Z; some have only two phases A, B; and the simplest has only one phase A. The encoder has 5 lead wires, of which 3 are pulse output lines, 1 is the COM terminal line, and 1 is the power line (OC gate output type). The encoder's power supply can be an external power source or directly use the PLC's DC24V power supply. The power supply "-" terminal must be connected to the encoder's COM terminal, and "+" to the encoder's power terminal. The encoder's COM terminal is connected to the PLC input COM terminal. The A, B, Z two-phase pulse output lines are directly connected to the PLC input terminals. A and B are pulses with a 90-degree phase difference. The Z phase signal produces only one pulse per encoder revolution and is typically used as the zero reference. When connecting, pay attention to the PLC input response time. The rotary encoder also has a shielded wire, which must be grounded during use to improve anti-interference performance. Encoder ----------- PLC.A ----------------- X0.B ----------------- X1.Z ------------------ X2 . + 24V ------------ + 24V.COM ------------- - 24V ----------- COM

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