German Kuebler encoder Kuebler model Kuebler price

Kuebler encoders are devices that encode signals (such as bitstreams) or data, converting them into signal forms suitable for communication, transmission, and storage. Encoders convert angular displacement or linear displacement into electrical signals; the former is called a code disk, and the latter a code scale. According to the readout method, encoders can be divided into contact and non-contact types; according to the working principle, encoders can be divided into incremental and absolute types. Incremental encoders convert displacement into periodic electrical signals, which are then converted into counting pulses, using the number of pulses to indicate the magnitude of displacement. Each position of an absolute encoder corresponds to a specific digital code, so its indication depends only on the starting and ending positions of the measurement, not on the intermediate process. The Encoder belongs to the category of sensors (Sensor), mainly used to detect the speed, position, angle, distance, or count of mechanical motion. In addition to mechanical applications, many motor controls, such as servo motors, require encoders for the motor controller to perform commutation, speed, and position detection. Encoders can be classified in the following ways. Classification by code disk engraving method: 1) Incremental type: emits a pulse signal for every unit angle of rotation (some emit sine/cosine signals, which are then subdivided to chop out higher frequency pulses), typically with A-phase, B-phase, or Z-phase output. The A-phase and B-phase outputs are pulses delayed by 1/4 cycle relative to each other; the direction of rotation can be distinguished based on the delay relationship, and 2x or 4x frequency multiplication can be achieved by using the rising and falling edges of the A-phase and B-phase signals. The Z-phase is a single-turn pulse, emitting one pulse per revolution. 2) Absolute type: for each reference angle within one revolution, it emits a unique binary value corresponding to that angle, allowing the recording and measurement of multiple positions via external circle-counting devices. Classified by signal output type: voltage output, open collector output, push-pull complementary output, and line driver output. Classified by mechanical installation form: 1) Shafted type: shafted types can be further divided into clamping flange, synchronous flange, and servo mount types. 2) Hollow shaft type: hollow shaft types can be further divided into semi-hollow, fully hollow, and large bore types. Classified by working principle: optical, magnetic, and contact brush types.

Kuebler encoder working principle

The magnetic encoder consists of a photoelectric code disk with a central shaft, featuring concentric transparent and opaque lines. Photoelectric emission and reception components read these lines to obtain four sets of sine wave signals combined into A, B, C, and D, with each sine wave having a phase difference of 90 degrees. By inverting the C and D signals and superimposing them on the A and B phases, signal stability is enhanced. Additionally, one Z-phase pulse is output per revolution to represent the zero reference position. Since the A and B phases differ by 90 degrees, the forward and reverse rotation of the magnetic encoder can be determined by comparing whether the A phase leads or the B phase leads. The zero reference position is obtained via the zero pulse. Code disk materials for magnetic encoders include glass, metal, and plastic. Glass code disks have very thin lines deposited on glass, offering good thermal stability and high precision. Metal code disks use direct transparent and opaque lines, but due to the thickness of the metal, precision is limited, and thermal stability is an order of magnitude worse than glass. Plastic code disks are an economical option. The principle of magneto-electric encoders is similar to that of optical encoders, but they use magnetic field signals. Inside a magnetic encoder, a magnetic rotor and magnetoresistive sensors are used. The rotation of the magnetic rotor causes changes in the internal magnetic field strength. The magnetoresistive sensor detects these changes, and after circuit signal processing, outputs the signal. The number of magnetic poles on the magnetic rotor, the number of magnetoresistive sensors, and the signal processing method determine the resolution of the magnetic encoder. The advantage of generating signals using magnetic field principles is that magnetic signals are not affected by dust, humidity, high temperatures, or vibration.

Kuebler encoder working principle

Series absolute encoders have 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 transparency and opacity of each line, a unique 2-ary code (Gray code) from the zeroth power of 2 to the n-1th power of 2 is obtained. This is called an n-bit absolute encoder. Such encoders are determined by the mechanical position of the optical code disk and are unaffected by power outages or interference. Absolute encoders determine the code by mechanical position; they do not require memory, do not need to find a reference point, and do not require continuous counting. The position is read whenever it is needed. Thus, the anti-interference characteristics and data reliability of the encoder are greatly improved.

Kuebler encoder wiring method

A rotary encoder is an optoelectronic rotary measuring device that directly converts the measured angular displacement into digital signals (high-speed pulse signals). Encoders can be classified by signal principle into incremental encoders and absolute encoders. We typically use incremental encoders, which can input the output pulse signals of the rotary encoder directly into the PLC, using the PLC's high-speed counter to count the pulse signals to obtain measurement results. Different models of rotary encoders have different numbers of output pulse phases; some rotary encoders output three-phase pulses A, B, and Z; some have only two phases A and B; 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, and 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 has only one pulse per encoder revolution, typically used as the zero-point reference. When connecting, pay attention to the PLC input response time. The rotary encoder also has a shielded wire, which should 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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