German TWK-Elektronik encoder TWK-Elektronik model TWK-Elektronik price

TWK-Elektronik encoders provide an absolutely unique position for each point, are interference-resistant, and do not require power-loss memory. They are increasingly widely used in angle and length measurement and positioning control in various industrial systems. Absolute rotary optical encoders, due to their absolutely unique position for each point, interference resistance, and lack of need for power-loss memory, are increasingly widely used in angle and length measurement and positioning control in various industrial systems. The optical code disk of an absolute encoder has many tracks, with each track arranged sequentially as 2 line, 4 line, 8 line, 16 line, and so on. In this way, at each position of the encoder, by reading the light and dark states of each track, a unique 2-ary code (Gray code) is obtained, ranging from the zeroth power of 2 to the n-1th power of 2. This is called a n-bit absolute encoder. Such encoders are determined by the mechanical position of the code disk and are unaffected by power outages or interference. The uniqueness of each position determined by the mechanical position of the absolute encoder means it requires no memory, no reference point search, and no continuous counting; the position is read whenever needed. This significantly improves the encoder's interference resistance and data reliability. Since absolute encoders are clearly superior to incremental encoders in positioning, they are increasingly used in industrial control positioning. Due to their high precision and large number of output bits, if parallel output were still used for absolute encoders, every bit of the output signal would need to ensure excellent connection, and isolation would be required for more complex conditions. The large number of cable cores brings considerable inconvenience and reduced reliability. Therefore, for multi-bit output types, absolute encoders generally use serial or bus-type output. The most common serial output for German-made absolute encoders is SSI (Synchronous Serial Interface). A single-turn absolute rotary encoder measures the tracks on the optical code disk during rotation to obtain a unique code. When rotation exceeds 360 degrees, the code returns to the origin, which violates the principle of absolute encoding uniqueness. Such encoders can only be used for measurements within a rotation range of 360 degrees and are called single-turn absolute encoders. To measure rotation beyond a 360-degree range, a multi-turn absolute encoder is required. Manufacturers of absolute encoders use the mechanical principle of clock gears. When the central code disk rotates, another set of code disks (or multiple sets of gears and code disks) is driven via gear transmission. This adds revolution counting to the single-turn code, expanding the encoder's measurement range. Such absolute encoders are called multi-turn absolute encoders. They also determine the code by mechanical position, ensuring each position code is unique and non-repeating without the need for memory. Another advantage of multi-turn encoders is their large measurement range, which often provides ample margin in actual use. This eliminates the need for tedious zero-point searching during installation; an intermediate position can serve as the starting point, greatly simplifying installation and commissioning. Multi-turn absolute encoders have clear advantages in length positioning and are increasingly used in industrial control positioning.

TWK-Elektronik encoder advantages

Encoder advantages: compact size, high precision, high inherent resolution, non-contact and wear-free; the same type can detect angular displacement and, with the help of mechanical conversion devices, linear displacement; multi-turn optical absolute encoders can detect relatively long ranges of linear displacement (e.g., 25-bit multi-turn). Long service life, flexible installation, rich interface options, and reasonable pricing. Mature technology, widely used domestically and internationally for many years. Advantages of magnetostrictive 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; acceptable price.

TWK-Elektronik encoder application areas

Compared with traditional optical and grating encoders, magnetic encoders offer better resistance to vibration, corrosion, contamination, interference, and wider temperature ranges, making them suitable for applications where traditional optical encoders cannot adapt. Magnetic encoders are specifically designed for extremely harsh environments, which generally require wide temperature characteristics, resistance to strong vibration and shock, and high protection ratings. In addition, we offer reliable signal output circuits and simple installation methods, which can greatly 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.

TWK-Elektronik encoder troubleshooting

Encoder internal fault: refers to a failure of 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 replacement of the cable or connector. Special attention should be paid to whether loose cable fixing causes loosening, leading to open solder joints or open circuits; in this case, the cable must be clamped tightly. Encoder +5V power supply drop: refers to the +5V power supply being too low, typically not below 4.75V. The cause of the low voltage is usually a power supply fault or excessive resistance in the power transmission cable causing loss. In this case, the power supply must be repaired or the cable replaced. Absolute encoder battery voltage drop: this fault usually triggers a clear alarm. The battery must be replaced. 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, and may even trigger servo system overload alarms immediately upon startup. Please pay special attention. Grating contamination: this reduces the signal output amplitude. Oil stains must be gently wiped off with lint-free cotton soaked in anhydrous alcohol.

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