German Hagglunds encoder Hagglunds model Hagglunds price

Hagglunds encoders are used to measure physical quantities bai such as speed, position, velocity, or angle. They are sensors that convert mechanical displacement du into electrical signals zhi, and are classified into incremental and absolute types. Incremental encoders generate pulse signals, and the number of pulses can be used to measure speed, length, or position. For absolute encoders, each position corresponds to a digital value of displacement. Inside the encoder, there is a rotating disk (code disk) with several transparent and opaque windows. A photoelectric receiver collects intermittent light beams, thereby converting light pulses into electrical pulses, which are then processed and output by electronic output circuits.

Hagglunds encoder working principle

A magnetic encoder consists of an optical code disk with a central shaft, featuring concentric transparent and opaque lines. Photoelectric emission and reception devices read these lines to obtain four sets of sine wave signals combined as A, B, C, and D, with each sine wave having a phase difference of 90 degrees. By inverting the C and D signals and superimposing them on the A and B phases, signal stability is enhanced. Additionally, one Z phase pulse is output per revolution to represent the zero reference position. Since the A and B phases differ by 90 degrees, the direction of rotation (forward or reverse) of the magnetic encoder can be determined by comparing whether the A phase leads or the B phase leads. The zero reference position is obtained via the zero pulse. Code disk materials for magnetic encoders include glass, metal, and plastic. Glass code disks have very thin lines deposited on glass, offering good thermal stability and high precision. Metal code disks use direct transparent and opaque lines, but due to the thickness of the metal, precision is limited, and thermal stability is an order of magnitude worse than that of glass. Plastic code disks are an economical option. The principle of magneto-electric encoders is similar to that of photoelectric encoders, but they use magnetic field signals. Inside a magnetic encoder, a magnetic rotor and magnetoresistive sensors are used. The rotation of the magnetic rotor causes changes in the internal magnetic field strength. The magnetoresistive sensors detect these changes, and the signal is processed by circuits before output. The number of magnetic poles on the rotor, the number of magnetoresistive sensors, and the signal processing method determine the resolution of the magnetic encoder. The advantage of using magnetic field principles for signal generation is that magnetic signals are not affected by dust, moisture, high temperatures, or vibration.

Hagglunds encoder application areas

Compared with traditional photoelectric and grating encoders, magneto-electric encoders offer better resistance to vibration, corrosion, contamination, interference, and wider temperature ranges, making them suitable for applications where traditional photoelectric encoders cannot adapt. Magnetic encoders are specifically designed for extremely harsh environments, which generally require wide temperature characteristics, the ability to withstand strong vibration and shock, and high protection ratings. In addition, we provide reliable signal output circuits and simple installation methods, which can significantly reduce losses from downtime. They are typically used in metallurgy, papermaking, and woodworking machinery. High-performance magnetic encoders are widely used in industrial control, mechanical manufacturing, ships, textiles, printing, aviation, aerospace, radar, communications, military industry, and other fields.

Hagglunds encoder hybrid type

Hybrid absolute encoders output two sets of information: one set detects magnetic pole positions and provides absolute information functionality; the other set is identical to the output information of incremental encoders. Photoelectric encoders are angle (angular velocity) detection devices. They convert the angle input to the shaft into corresponding electrical pulses or digital values using the photoelectric conversion principle. They offer advantages such as compact size, high precision, reliable operation, and digital interfaces. They are widely used in devices and equipment requiring angle detection, such as CNC machine tools, rotary tables, servo drives, robots, radar, and military target measurement.

Weidou Intelligent Technology specializes in selling German Hagglunds rotary encoders, Hagglunds incremental encoders, Hagglunds absolute encoders, Hagglunds photoelectric encoders, Hagglunds magneto-electric encoders, Hagglunds shafted encoders, Hagglunds hollow shaft encoders, Hagglunds contact brush encoders, Hagglunds angle encoders, Hagglunds linear encoders, Hagglunds digital encoders, Hagglunds draw-wire encoders, Hagglunds position encoders, Hagglunds hollow bore encoders, and Hagglunds spindle encoders. All Hagglunds products are original imports from Germany. Customers are welcome to inquire and place orders.