German wachendorff encoder wachendorff model wachendorff price

wachendorff 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 referred to as a code disk, and the latter as 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 represent the magnitude of displacement. Each position of an absolute encoder corresponds to a specific digital code, so its indication depends only on the start and end positions of the measurement, not on the intermediate process. The Encoder belongs to the Sensor category, mainly used to detect mechanical motion speed, position, angle, distance, or count. 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 slotting 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 2x or 4x 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 within one revolution, a unique binary value corresponding to that angle is emitted, allowing 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 mounting 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: optical, magnetic, and contact brush types.

wachendorff encoder installation and usage

Mechanical mounting of absolute rotary encoders includes high-speed end mounting, low-speed end mounting, and auxiliary mechanical device mounting. High-speed end mounting: installed at 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 revolutions fall within this range, the full range can be utilized to improve resolution. The disadvantage is gear backlash error during forward and reverse 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 mounted on the high-speed end, motor vibration must be minimal, otherwise the encoder is prone to damage. Low-speed end mounting: installed after the reduction gear, such as at the shaft end of a hoist wire rope drum or the last reduction gear shaft end. This method eliminates gear backlash, provides more direct measurement and higher accuracy, and is generally used for long-distance positioning measurements, such as various lifting equipment and feed cart positioning. Auxiliary mechanical mounting: common methods include rack and pinion, chain and belt, friction wheels, and rope take-up mechanisms.

wachendorff encoder advantages and disadvantages

(1) Advantages: high precision, high resolution, high reliability, capable of directly outputting digital codes in a specific format, easy to connect with microcomputers and digital systems, very flexible and convenient to use, mainly used for measuring various displacements. (2) Disadvantages: (1) The resolution of contact encoders is limited by the brushes and cannot be very high; (2) Contact generates friction, resulting in a shorter service life; (3) Contact points do not allow high-speed operation. Therefore, this type of encoder is rarely used.

wachendorff encoder applications

This encoder uses relative counting for position measurement. Before operation, signals such as the pulse counts corresponding to speed change points, leveling points, and braking stop points are stored in respective memory units via programming. During elevator operation, the rotary encoder detects and software calculates the following signals in real time: elevator floor position, speed change point position, and leveling point position, thereby performing floor counting and issuing speed change and leveling signals.

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