German heidenhain encoder heidenhain model heidenhain price

heidenhain encoders are devices used to measure rotational speed and, in conjunction with PWM technology, enable rapid speed regulation. Optical rotary encoders convert mechanical quantities such as angular displacement and angular velocity of the output shaft into corresponding electrical pulses via photoelectric conversion, outputting them as digital signals (REP). They are categorized into single-channel output and dual-channel output types. Key technical parameters include pulses per revolution (ranging from tens to thousands) and supply voltage. Single-channel output means the rotary encoder outputs one set of pulses, while dual-channel output rotary encoders output two sets of A/B with a phase difference of 90 degrees. Using these two sets of pulses allows not only speed measurement but also determination of rotation direction. Based on signal output type, they are classified as: voltage output, open-collector output, push-pull complementary output, and line-driver output.

heidenhain encoder installation and usage

Mechanical installation of absolute rotary encoders includes high-speed end installation, low-speed end installation, and auxiliary mechanical device installation. High-speed end installation: mounted on the drive motor shaft end (or via gear connection). The advantage is high resolution; since multi-turn encoders have 4096 turns, and the motor's rotation count falls within this range, the full range can be utilized to improve resolution. The disadvantage is gear backlash error during reciprocating motion after passing through reduction gears, so it is generally used for unidirectional high-precision control positioning, such as roll gap control in steel rolling. Additionally, when the encoder is directly installed on the high-speed end, motor vibration must be minimal to avoid damaging the encoder. Low-speed end installation: mounted after the reduction gear, such as on the shaft end of a hoist wire rope drum or the last stage of the reduction gear shaft. This method eliminates gear backlash, provides more direct measurement and higher accuracy, and is generally used for long-distance positioning, such as in various lifting equipment and feed cart positioning. Auxiliary mechanical installation: common methods include rack and pinion, chain and belt, friction wheels, and rope reeling mechanisms.

heidenhain encoder advantages

Compact size, high bai precision, high inherent du resolution, 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 considerable linear displacement ranges (e.g., 25-bit multi-turn). Long service life, flexible installation, rich interface options, and reasonable pricing. Mature technology widely applied domestically and internationally for many years. Disadvantages: high precision requires robust protection for outdoor and harsh environments; linear displacement measurement relies on mechanical conversion, requiring elimination of errors caused by mechanical backlash; detecting objects moving on tracks makes it difficult to overcome slip differences. Advantages of magnetostrictive absolute encoders: moderate size, direct linear displacement measurement, absolute digital encoding, theoretically unlimited range; non-contact and wear-free, resistant to harsh environments, usable underwater up to 1000 meters; rich interface options and diverse measurement methods.

heidenhain encoder troubleshooting

Encoder internal fault: refers to faults in the encoder's own components, preventing it from generating and outputting correct waveforms. In this case, the encoder or its internal components must be replaced or repaired. Encoder connection cable fault: this fault occurs most frequently and is often encountered during maintenance, so it should be the primary consideration. It is usually caused by open circuits, short circuits, or poor contact in the encoder cable, requiring cable or connector replacement. Special attention should be paid to whether loose cable fixation causes loosening, leading to dry joints or open circuits; in this case, the cable must be clamped tightly. Encoder +5V power drop: refers to +5V power being too low, typically not below 4.75V, caused by power supply faults or excessive resistance in the power transmission cable leading to losses; in this case, repair the power supply or replace the cable. Absolute encoder battery voltage drop: this fault usually triggers a clear alarm; the battery must be replaced, and if the reference point position memory is lost, a return-to-reference-point operation must be performed. Encoder cable shield wire not connected or detached: this introduces interference signals, causing waveform instability and affecting communication accuracy; reliable soldering and grounding of the shield wire must be ensured. Loose encoder installation: this fault affects position control accuracy, causing excessive position deviation during stopping and movement, or even triggering servo system overload alarms immediately upon startup; please pay special attention. Grating contamination: this reduces signal output amplitude; oil stains must be gently wiped off using lint-free cotton soaked in anhydrous alcohol.

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