German von Rohr Armaturen AG encoder, von Rohr Armaturen AG model, von Rohr Armaturen AG price

von Rohr Armaturen AG encoders use a photoelectric pulse generator synchronized with the spindle, transmitting synchronization 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 given to the feed servo motor must correspond to the spindle speed; the spindle pulse generator serves to link spindle rotation with feed motion. Threads are continuous ridges and grooves with identical cross-sectional profiles formed along a helix on cylindrical or conical surfaces. Threads formed on cylindrical surfaces are called cylindrical threads, and those formed on conical surfaces 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 to rotate at a constant speed. The lathe feed mechanism drives the turning tool (standard thread turning tool) to move in a straight line at a constant speed 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). In the thread machining trajectory, sufficient acceleration lead-in distance δ and deceleration lead-out distance δˊ are provided to ensure thread quality and eliminate pitch errors caused by servo lag.

von Rohr Armaturen AG encoder types and classification

Shafted type: Shafted types can be further divided into clamping flange type, synchronous flange type, and servo mount type. Hollow shaft type: Hollow shaft types can be further divided into semi-hollow, fully hollow, and large-bore types. Based on working principles, encoders can be classified as optical, magnetic, and contact brush types. Based on the coding disk marking method, encoders are classified into incremental and absolute types. Incremental encoders convert displacement into periodic electrical signals, which are then converted into counting pulses; the number of pulses represents the magnitude of displacement. Each position of an absolute encoder corresponds to a unique digital code, so its reading depends only on the start and end positions of the measurement, not on the intermediate process. Rotary incremental encoders output pulses during rotation, and their position is determined by counting equipment. When the encoder is stationary or power is lost, the position is retained by the internal memory of the counting device. Thus, after a power loss, the encoder must not move; during power-up, pulse output must not be interrupted by interference, otherwise the zero point remembered by the counting device will shift. This shift amount is unknown until erroneous production results occur. The solution is to add a reference point; each time the encoder passes the reference point, the reference position corrects the memory position of the counting device. Before the reference point, position accuracy cannot be guaranteed. Therefore, in industrial control, methods such as finding the reference point before each operation or homing at startup are used. For example, printers and scanners use the incremental encoder principle for positioning; at each startup, we hear a series of clicks as it finds the reference zero point before starting work. This method is troublesome for some industrial control projects, or even prohibited if accurate position is required immediately after startup, leading to the emergence of absolute encoders. Absolute rotary optical encoders, due to their unique absolute position, anti-interference capability, and no need for power-loss memory, are increasingly widely used for angle, length measurement, and positioning control in various industrial systems. The optical code disk of an absolute encoder has many tracks, arranged sequentially with 2 lines, 4 lines, 8 lines, and 16 lines. Thus, at each position of the encoder, by reading the light/dark state of each track, a unique 2-base 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 code disk and are unaffected by power loss or interference. The uniqueness of each position determined by mechanical means means absolute encoders require no memory, no reference point search, and no continuous counting; the position is read whenever needed. This greatly improves the encoder's anti-interference characteristics and data reliability. Since absolute encoders are significantly superior to incremental encoders in positioning, they are increasingly used in industrial control positioning. Due to the high precision and large number of output bits of absolute encoders, if parallel output were used, each bit's signal would need to ensure excellent connection, and isolation would be required for complex conditions, resulting in many cable cores, inconvenience, and reduced reliability. Therefore, multi-bit absolute encoders generally use serial or bus output. The most common serial output for German-made absolute encoders is SSI.

von Rohr Armaturen AG encoder advantages

Small size, high bai precision; the du itself can have very high resolution, with no contact and no wear; the same zhi type can detect angular displacement and, with the help of dao mechanical conversion devices, linear displacement; multi-turn optical absolute encoders can detect considerable ranges of linear displacement (e.g., 25-bit multi-turn). Long service life, flexible installation, rich interface options, and reasonable price. Mature technology, widely applied domestically and internationally for many years. Disadvantages: High precision but requires higher protection for outdoor and harsh environments; measuring linear displacement relies on mechanical conversion, requiring elimination of errors caused by mechanical backlash; difficult to overcome slip when detecting objects moving on tracks. Advantages of magnetostatic grating absolute encoders: Moderate size, direct measurement of linear displacement, absolute digital coding, theoretically unlimited range; no contact, no wear, resistant to harsh environments, usable underwater up to 1000 meters; rich interface options and diverse measurement methods.

von Rohr Armaturen AG encoder applications

Textile machinery, irrigation machinery, papermaking and printing, water conservancy gates, robots and robotic arms, port lifting machinery, steel and metallurgical equipment, heavy machinery, precision measurement equipment, machine tools, food machinery, elevators, and other special equipment.

Weidou Intelligent Technology professionally sells German von Rohr Armaturen AG rotary encoders, von Rohr Armaturen AG incremental encoders, von Rohr Armaturen AG absolute encoders, von Rohr Armaturen AG optical encoders, von Rohr Armaturen AG magnetic encoders, von Rohr Armaturen AG shafted encoders, von Rohr Armaturen AG hollow shaft encoders, von Rohr Armaturen AG contact brush encoders, von Rohr Armaturen AG angle encoders, von Rohr Armaturen AG linear encoders, von Rohr Armaturen AG digital encoders, von Rohr Armaturen AG draw-wire encoders, von Rohr Armaturen AG position encoders, von Rohr Armaturen AG hollow bore encoders, von Rohr Armaturen AG spindle encoders, von Rohr Armaturen AG original German imports. Welcome customers to inquire and order.