German DEUTCHMANN encoder, DEUTCHMANN model, DEUTCHMANN price

DEUTCHMANN encoders belong to the detection and transmission stage in closed-loop control. They are used to detect the rotor magnetic field position of servo motors, providing accurate motor speed and position signals. The magnetic encoder then outputs signals to the drive for analysis, comparison, and logical judgment, ultimately driving the servo motor. In essence, a magnetic encoder is a sensor that continuously provides accurate signals to the drive to facilitate precise analysis and judgment.

Requirements for DEUTCHMANN encoder devices

1. Requirements of CNC machine tools for detection elements and position detection devices (1) Requirements of CNC machine tools for detection elements: Detection elements are important components of detection devices, primarily used to detect displacement and speed and send feedback signals. The minimum displacement measurable by a displacement detection system is called resolution. Resolution depends not only on the detection element itself but also on the measurement circuit. The main requirements of CNC machine tools for detection elements are: (1) long service life, high reliability, and strong anti-interference capability; (2) meeting precision and speed requirements; (3) ease of use and maintenance, suitable for the machine tool operating environment; (4) low cost; (5) ease of connection to computers. Different types of CNC machine tools have different requirements for the precision and speed of detection systems. Typically, large CNC machine tools prioritize meeting speed requirements, while medium, small, and high-precision CNC machine tools prioritize meeting precision requirements. When selecting the resolution and pulse equivalent of a measurement system, it is generally required to be one order of magnitude higher than the machining precision. (2) Requirements of CNC machine tools for position detection devices: Position detection devices are an important part of the servo system of CNC machine tools. Their function is to detect displacement and speed, send feedback signals, and form closed-loop or semi-closed-loop control. The machining precision of CNC machine tools is mainly determined by the precision of the detection system. Different types of CNC machine tools have different requirements for the precision of position detection elements and detection systems, as well as the maximum moving speed of the measured components. The highest level of detection elements and systems is: when the maximum moving speed of the measured component reaches 240m/min, the resolution of displacement detection (the minimum detectable displacement) can reach 1μm; for example, at 24m/min, it can reach 0.1μm. The highest resolution can reach 0.01μm. CNC machine tools have the following requirements for position detection devices: (1) minimal influence from temperature and humidity, reliable operation, long-term precision retention, and strong anti-interference capability. (2) meeting precision and speed requirements within the moving range of the machine tool's executing components. (3) ease of use and maintenance, adapting to the machine tool working environment. (4) low cost. Introduction to spindle encoders 2. Classification of position detection devices: For different types of CNC machine tools, different detection methods can be adopted due to varying working conditions and detection requirements. (1) Incremental and absolute measurement: Incremental detection methods measure only displacement increments and represent the quantity of unit displacement (i.e., the minimum setting unit) by the number of digital pulses, issuing a measurement signal for every movement of one measurement unit. Its advantage is that the detection device is relatively simple, and any midpoint can serve as the measurement starting point. However, in this system, the displacement is read out by accumulating measurement signals; once an accumulation error occurs, all subsequent measurement results will be incorrect. Additionally, in the event of a fault (such as power loss), the correct position before the fault cannot be found; after troubleshooting, the worktable must be moved to the starting point to recount and find the correct position before the fault. Pulse encoders, resolvers, induction synchronizers, gratings, magnetic scales, and laser interferometers are all incremental detection devices. Absolute measurement methods measure the absolute coordinate position value of the measured component in a certain absolute coordinate system and represent it in binary or decimal digital signals. Generally, these signals must be converted into pulse digital signals before being sent for comparison and display. With this method, the higher the resolution requirement, the more complex the structure. Such measurement devices include absolute pulse code disks and three-speed absolute code disks (also known as multi-turn absolute code disks). (2) Digital and analog measurement: Digital detection quantifies the measured unit and represents it in digital form. The measurement signal is generally an electrical pulse, which can be directly sent to the CNC system for comparison and processing. Such detection devices include pulse encoders and gratings. Digital detection has the following 3 characteristics. (1) The measured quantity is converted into the number of pulses, facilitating display and processing; (2) Measurement precision depends on the measurement unit and is basically unrelated to the range; however, cumulative code errors exist; (3) The detection device is relatively simple, and pulse signals have strong anti-interference capability. Analog detection represents the measured quantity using continuous variables, such as changes in voltage amplitude or phase. Precise analog detection over a large range imposes high technical requirements; in CNC machine tools, analog detection is mainly used for small-range measurements. Analog detection devices include tachogenerators, resolvers, induction synchronizers, and magnetic scales. The main characteristics of analog detection are as follows. (1) Direct detection of the measured quantity without quantization. (2) High-precision measurement can be achieved within a small range. (3) Capable of direct and indirect detection. Position detection devices installed on executing components (i.e., end pieces) to directly measure the linear or angular displacement of the end pieces of executing components are called direct measurement, which can form a closed-loop feed servo system,Measurement methods include linear gratings, linear induction synchronizers, magnetic scales, and laser interferometers to measure the linear displacement of executing components; since this detection method uses linear detection devices to measure the linear displacement of machine tools. Its advantage is that it directly reflects the linear displacement of the worktable. The disadvantage is that the detection device is required to be as long as the travel distance, which is a significant limitation for large machine tools. Position detection devices installed on transmission elements in front of executing components or on the drive motor shaft measure angular displacement, and the linear displacement of the executing components is obtained after transformation by the transmission ratio; this is called indirect measurement, which can form a semi-closed-loop servo feed system. For example, installing a pulse encoder on the motor shaft. Indirect measurement is reliable and convenient to use, with no length limitations; its disadvantage is that the transmission chain error from linear to rotary motion is added to the detection signal, thereby affecting measurement precision. Generally, compensation for the transmission error of the machine tool is required to improve positioning precision. In addition to the above position detection devices, servo systems often include speed detection elements to detect and adjust the engine speed. The commonly used speed detection element is the tachogenerator.

DEUTCHMANN encoder advantages and disadvantages

(1) Advantages: High precision, high resolution, high reliability, capable of directly outputting digital codes in a certain 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 brushes and cannot be very high; (2) Contact causes friction, resulting in a shorter service life; (3) Contact points do not allow high-speed operation. Therefore, this type of encoder is rarely used.

Notes on DEUTCHMANN encoder selection

1) Mechanical installation dimensions: including locating spigot, shaft diameter, mounting hole positions; cable outlet method; installation space volume; whether the working environment protection rating meets requirements. 2) Resolution: i.e., the number of pulses output per revolution when the encoder is working, whether it meets the design usage precision 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 type transistor output, C2 is PNP type transistor output), and long-line driver output. The output method should match the interface circuit of its control system.

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