German Balluff encoder Balluff model Balluff price

Balluff 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, provide accurate motor speed and position signals, and then the magnetic encoder outputs signals to the drive for analysis, comparison, and logical judgment, finally driving the servo motor. In fact, a magnetic encoder is a sensor that constantly provides accurate signals to the drive to facilitate precise analysis and judgment.

Balluff encoder principle

Magnetic encoders adopt a magneto-electric design, generating or providing the position and speed of the actuator (servo motor) based on magnetic field changes in magnetic sensing devices. The physical working principle of magnetic encoders is the magnetoresistive effect. The magnetoresistive effect arises from charge carriers inside a current-carrying conductor or semiconductor; under the influence of the external Lorentz force, the trajectory of internal charge carriers deflects or undergoes spiral motion, thereby changing the potential difference within the conductor or semiconductor. This process is a microscopic manifestation; macroscopically, as long as the external magnetic field changes, the magnetoresistance value also changes accordingly. This is the magnetoresistive effect of magnetic encoders. The magnetoresistive devices in magnetic encoders include semiconductor magnetoresistive devices and ferromagnetic magnetoresistive devices. Thus, the detection probe of a magnetic encoder uses a magnetoresistive device as the magnetic head. Currently, common magnetoresistive heads for magnetic encoder probes include Giant Magnetoresistance (GMR) heads (GMR) and Anisotropic Magnetoresistance (AMR) heads (AMR). However, due to advantages such as better frequency characteristics and higher sensitivity compared to GNR (GNR) heads, AMR (AMR) heads are gradually becoming the mainstream application for magnetic encoders.

Balluff encoder advantages

Small size, high precision (bai), high resolution of du itself, non-contact and wear-free; 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 relatively long ranges of linear displacement (such as 25-bit multi-turn). Long service life, flexible installation, rich interface options, reasonable price. Mature technology, widely applied domestically and internationally for many years. Disadvantages: High precision but requires higher protection for outdoor and harsh environment use; measuring linear displacement relies on mechanical device conversion, requiring elimination of errors caused by mechanical backlash; difficult to overcome slip when detecting objects running on tracks. Advantages of magnetostatic grating absolute encoders: Moderate size, direct measurement of linear displacement, absolute digital coding, theoretically unlimited range; non-contact and wear-free, resistant to harsh environments, usable underwater up to 1000 meters; rich interface options, diverse measurement methods.

Balluff encoder signal output

Signal outputs include sine waves (current or voltage), square waves (TTL, HTL), open collector (PNP, NPN), push-pull, and other forms. Among these, TTL is long-line differential drive (symmetric A, A-; B, B-; Z, Z-). HTL is also known as push-pull output. The signal receiving equipment interface should match the encoder. Signal connection—encoder pulse signals are generally connected to counters, PLC, and computers. Modules connecting PLC and computers are divided into low-speed and high-speed modules, with varying switching frequencies. Single-phase connection is used for unidirectional counting and speed measurement. A.B two-phase connection is used for bidirectional counting, direction judgment, and speed measurement. A, B, Z three-phase connection is used for position measurement with reference mark correction. Connection of A, A-, B, B-, Z, Z- includes symmetric negative signals, resulting in an electromagnetic field contribution to the cable of 0, minimizing attenuation and providing optimal interference resistance, allowing for longer transmission distances. For encoders with TTL symmetric negative signal output, the signal transmission distance can reach 150 meters. For encoders with HTL symmetric negative signal output, the signal transmission distance can reach 300 meters.

Weidou Intelligent Technology professionally sells German Balluff rotary encoders, Balluff incremental encoders, Balluff absolute encoders, Balluff optical encoders, Balluff magnetic encoders, Balluff shafted encoders, Balluff hollow shaft encoders, Balluff contact brush encoders, Balluff angle encoders, Balluff linear encoders, Balluff digital encoders, Balluff draw-wire encoders, Balluff position encoders, Balluff hollow bore encoders, Balluff spindle encoders. Balluff original imports from Germany. Welcome inquiries and orders from users.