German Gunda encoder Gunda model Gunda price

Gunda 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 operating 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. In absolute encoders, each position corresponds to a specific digital code, so its reading depends only on the start and end positions of the measurement, not on the intermediate process. The Encoder is a type of 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 as follows. Classification by code disk aperture 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, and Z-phase outputs. 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 2-fold or 4-fold frequency multiplication can be achieved by taking 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 corresponding to one revolution, it emits a unique binary value corresponding to that angle, allowing the recording and measurement of multiple positions via external revolution-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) Shaft type: shaft 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 operating principle: photoelectric, magneto-electric, and contact brush types.

Gunda Encoder Introduction

A detector capable of outputting angular data within one motor revolution to an external target. Absolute encoders can generally output 360 ° with 8 to 12 bits. Incremental encoders have a disadvantage: axis position is lost in the event of a power failure. However, for absolute encoders, axis position is not lost even if a power failure occurs. 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 encoders have many light channel tracks on the optical code disk, with each track arranged sequentially with 2 lines, 4 lines, 8 lines, and 16 lines. At each position of the encoder, a unique 2-ary code (Gray code) is obtained by reading the light/dark state of each track, representing values from 2 to the power of zero up to 2 to the power of n-1. Absolute encoders determine the code by mechanical position; they require 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 in certain special machine tools.

Gunda Encoder Component Differences

From single-turn absolute encoders to multi-turn absolute encoders. In a single-turn absolute rotary encoder, unique codes are obtained by measuring the tracks of the optical code disk during rotation. When rotation exceeds 360 degrees, the code returns to the origin, which violates the principle of unique absolute encoding. Such encoding is only suitable for measurements within a rotation range of 360 degrees and is called a single-turn absolute encoder. To measure rotation exceeding a 360-degree range, multi-turn absolute encoders are used. Encoder manufacturing employs clock gear mechanics; when the central code disk rotates, another set of code disks (or multiple sets of gears and code disks) is driven via gears. Revolution counting is added to the single-turn encoding to expand the encoder's measuring range. This type of absolute encoder is called a multi-turn absolute encoder. It also determines the code by mechanical position, with each position code being unique and non-repeating, requiring no memory. Another advantage of multi-turn encoders is that the large measuring range often provides ample margin, eliminating the need to painstakingly find the zero point during installation; an intermediate position can serve as the starting point, greatly simplifying installation and commissioning.

Gunda Encoder Features

1) After power-up or following internal/external power faults, the encoder does not require reference driving and can obtain the current accurate position once power is normal. Under interference from various harsh environments, the raw position test data of the hollow shaft encoder remains stable and is not easily affected by interference. 2) The encoder can provide an incremental pulse code value for each axis position, especially in position control. Incremental encoders do not require counting, enabling direct high-speed internal reading and external output. Furthermore, subsequent calculation tasks in the receiving device controller can reduce the cost of additional input components. For example, hollow shaft encoders in multi-axis parallel industrial robots can achieve high-speed multi-axis parallel synchronous operation, as well as in various control fields requiring multi-axis synchronization. 3) Fast and reliable digital data transmission is currently one of the core elements of encoders. Due to their high-resolution characteristics, hollow shaft encoders generally output digital signals directly without internal or external counting, thus avoiding the influence of pulse reading and accumulation. They offer fast response speeds at high speeds, and hollow shaft encoders can also achieve high resolution in high-efficiency equipment. 4) The encoder is a very flexible device, characterized mainly by its compactness and ease of adjustment; position can usually be adjusted flexibly via spring plates. The hollow shaft encoder can determine the direction of rotation from the numerical value of the pulse signals via the A-phase pulse signal and the B-phase output timing. Currently, hollow shaft encoders are generally adaptable to various application scenarios. 5) The clamping method and spring plate structure of this shaft encoder allow for easy position adjustment and absorption of load vibration and shock. Moreover, the hollow shaft encoder outputs based on the rotational displacement of the shaft during operation; combined with the shaft via a coupling, it can directly detect rotational displacement. Typically, no homing is required at startup; under normal conditions, the rotation angle can be output in parallel as an absolute value.

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