German Baumer gmbh encoder, Baumer gmbh model, Baumer gmbh price

Baumer gmbh encoders use a photoelectric pulse generator synchronized with the spindle, transmitting synchronously via gears on an intermediate shaft in a 1:1 ratio. There is no direct mechanical connection between the rotation of the CNC lathe spindle and the feed motion. To machine threads, the number of pulses supplied to the feed servo motor must correspond to the spindle speed; the spindle pulse generator links spindle rotation to feed motion. A thread consists of continuous ridges and grooves of identical profile formed along a helix on a cylindrical or conical surface. Threads formed on a cylindrical surface are called cylindrical threads, and those formed on a conical surface are called conical threads. Threads formed on the outer surface of a body of revolution are called external threads, and those formed on the inner surface are called internal threads. There are many methods for machining threads. When cutting threads on a lathe, the lathe clamps the cylindrical workpiece with a three-jaw chuck and drives it at a constant rotational speed. The lathe feed mechanism drives the turning tool (standard threading tool) in a constant linear motion along the cylinder axis. The tool tip cuts triangular grooves into the workpiece surface to form triangular threads. During thread machining, there is a trajectory start point (A point, i.e., the tool engagement point) and a trajectory end point (B point, i.e., the tool retraction point). Sufficient acceleration lead-in distance δ and deceleration lead-out distance δˊ are provided in the thread machining trajectory to eliminate pitch errors caused by servo lag.

Baumer gmbh encoder device requirements

1. Requirements for detection elements and position detection devices in CNC machine tools (1) Requirements for detection elements in CNC machine tools Detection elements are important components of detection devices. Their main function is to detect displacement and speed and send feedback signals. The minimum displacement that a displacement detection system can measure is called resolution. Resolution depends not only on the detection element itself but also on the measurement circuit. The main requirements for detection elements in CNC machine tools are: (1) long service life, high reliability, and strong anti-interference capability; (2) meeting accuracy and speed requirements; (3) ease of use and maintenance, suitable for the machine tool operating environment; (4) low cost; (5) easy connection to computers. Different types of CNC machine tools have different requirements for the accuracy and speed of the detection system. Typically, large CNC machine tools prioritize speed requirements, while medium, small, and high-precision CNC machine tools prioritize accuracy 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 accuracy. (2) Requirements for position detection devices in CNC machine tools Position detection devices are an important part of the CNC machine tool servo system. Their function is to detect displacement and speed and send feedback signals to form closed-loop or semi-closed-loop control. The machining accuracy of CNC machine tools is mainly determined by the accuracy of the detection system. Different types of CNC machine tools have different accuracy requirements for position detection elements and detection systems, as well as different maximum moving speeds for the measured components. The highest level of detection elements and systems is: when the maximum moving speed of the measured component is as high as 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 accuracy retention, and strong anti-interference capability. (2) Meeting accuracy and speed requirements within the movement 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 only measure displacement increments and represent the quantity of unit displacement (i.e., the minimum setting unit) by the number of digital pulses. A measurement signal is issued 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 by accumulating measurement signals. If an accumulation error occurs, all subsequent measurement results will be incorrect. Additionally, if a fault occurs (such as power loss), the correct position before the incident cannot be found. After the fault is cleared, the worktable must be moved to the starting point to recount and find the correct position before the incident. 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 specific 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 encoding disks and three-speed absolute encoding disks (also known as multi-turn absolute encoding disks). (2) Digital and analog measurement Digital detection quantifies the measured unit and represents it in digital form. The measurement signal is usually 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 accuracy depends on the measurement unit and is basically independent of 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 elements) to directly measure the linear or angular displacement of the end elements of the 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 the machine tool, its advantage is that it directly reflects the linear displacement of the worktable. The disadvantage is that the detection device must be as long as the travel distance, which is a significant limitation for large machine tools. Position detection devices installed on transmission elements or drive motor shafts ahead of the executing components measure angular displacement. The linear displacement of the executing components is obtained after conversion through the transmission ratio. This is called indirect measurement and can form a semi-closed-loop servo feed system. For example, mounting a pulse encoder on the motor shaft. Indirect measurement is reliable and convenient to use, with no length limitations. Its disadvantage is that transmission chain errors from converting linear to rotary motion are added to the detection signal, thereby affecting measurement accuracy. Generally, compensation for the machine tool's transmission errors is required to improve positioning accuracy. 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.

Baumer gmbh encoder selection precautions

1) Standard housings for absolute encoders: 38MM, 58MM, 66MM, 80MM.100MM.2) Absolute encoders are divided into: single-turn and multi-turn. 3) Bus encoders are classified by principle into: secondary absolute encoders and optical absolute encoders. 4) Bus encoder cable exit methods are divided into: side exit and rear exit. 5) Bus encoder shafts are divided into: 6MM, 8MM, 10MM, 12MM, 14MM, 25MM. 6) Bus encoders are divided into: shaft, blind hole, and through hole. 7) Bus encoder protection ratings are divided into: IP54-68. 8) Bus encoder mounting methods are divided into: clamping flange, synchronous flange, clamping band with synchronous flange, blind hole (spring leaf, clamping), and through hole (spring leaf, key pin). 9) Absolute encoder accuracy is divided into: single-turn accuracy and multi-turn accuracy. Combined, they constitute the total accuracy, which is typically expressed in bits (commonly 24 bits, 25 bits, 30 bits, 32 bits). 10) Absolute encoder communication protocol baud rate: 4800~115200 bit/s, default is 9600 bit/s. Refresh cycle is approximately 1.5ms Eleven. Encoder output options: SSI, 4-20MA, profibus-dp, DEVicenet, parallel, binary code, BESM58, BiSS, ISI, CANopen, Endat, and Hiperface, etc.

Baumer gmbh encoder wiring method

A rotary encoder is a photoelectric rotary measurement device that directly converts the 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, which allow the output pulse signals of the rotary encoder to be directly input to the PLC. 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, and Z; some have only two phases: A and B; and the simplest have 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 power supply can be an external power source or directly use the DC24V power supply of the PLC. 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 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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