German CODECHAMP encoder CODECHAMP model CODECHAMP price

CODECHAMP encoders feature 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 of lines, with each track arranged sequentially as 2 line, 4 lines, 8 lines, 16 lines..., so that, 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 in an absolute encoder is determined by its mechanical position; it requires no memory, no reference point search, and no continuous counting. The position is read only when needed. Thus, the interference resistance and data reliability of the encoder are greatly improved. Since absolute encoders are significantly 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, each bit's output signal would need to ensure excellent connection, and isolation would be required for complex operating conditions. The large number of cable cores brings much inconvenience and reduces 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. Count encoding is added to the single-turn encoding to expand the measurement range of the encoder. Such absolute encoders are called multi-turn absolute encoders. They also determine encoding by mechanical position, ensuring each position code is unique and non-repeating without the need for memory. Another advantage of multi-turn encoders is that the large measurement range often provides considerable margin in actual use. Thus, there is no need to struggle to find the zero point during installation; an intermediate position can be used as the starting point, greatly simplifying installation and commissioning. Multi-turn absolute encoders have obvious advantages in length positioning and are increasingly used in industrial control positioning.

CODECHAMP encoder principle

Optical encoders utilize the principle of grating diffraction to achieve displacement-to-digital conversion. They are sensors that convert mechanical geometric displacement on the output shaft into pulse digital quantities through photoelectric conversion. Common optical encoders consist of a grating disk, a light-emitting element, and a photosensitive element. The grating is essentially a disk with regular transparent and opaque lines. The light flux received by the photosensitive element changes synchronously with the transparent lines. The waveform output from the photosensitive element is shaped into pulse signals, with one pulse output per revolution. Based on pulse changes, equipment displacement can be precisely measured and controlled. Incremental encoders directly utilize the photoelectric conversion principle to output three sets of square wave pulses: phase A, phase B, and phase Z. The phase difference between the A and B pulse groups is 90º, allowing easy determination of the rotation direction. Phase Z generates one pulse per revolution and is used for reference point positioning. Its advantages include simple structural design, a mechanical average life of tens of thousands of hours or more, strong interference resistance, and high reliability, making it suitable for long-distance transmission. Its disadvantage is the inability to output absolute position information of the shaft rotation.

CODECHAMP encoder advantages

Compact size, high bai precidusion, high inherent resolution of the zhi type, non-contact and wear-free; the same dao variety can detect angular displacement and, with the help of mechanical conversion devices, linear displacement; multi-turn optical absolute encoders can detect considerable lengths 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. Disadvantages: High precision imposes higher protection requirements for outdoor and harsh environment use; measuring linear displacement relies on mechanical device conversion, requiring elimination of errors caused by mechanical backlash; overcoming slip is difficult when detecting objects moving on tracks. Advantages of magnetostatic grid absolute encoders: Moderate size, direct measurement of linear displacement, 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.

CODECHAMP encoder wiring method

A rotary encoder is a photoelectric rotary measuring device that directly converts the measured angular displacement into digital signals (high-speed pulse signals). Encoders are classified by signal principle into incremental encoders and absolute encoders. We commonly use incremental encoders, which can input the output pulse signals of the rotary encoder directly into a PLC. The PLC's high-speed counter counts these pulse signals to obtain measurement results. Different models of rotary encoders have different numbers of output pulse phases. Some rotary encoders output three-phase pulses: A, B, and Z; some have only two phases, A and B; the simplest has only phase A. The encoder has 5 lead wires, of which 3 are pulse output lines, 1 is the COM terminal line, and 1 is the power line (OC open-collector output type). The encoder power supply can be an external power source or directly use the PLC's DC24V power supply. The power supply "-" terminal must be connected to the encoder's COM terminal, and "+" to the encoder's power terminal. The encoder's COM terminal is connected to the PLC input COM terminal. The A, B, and Z two-phase pulse output lines are directly connected to the PLC input terminals. A and B are pulses with a phase difference of 90 degrees. The Z phase signal has only one pulse per encoder revolution and is typically used as the zero-point reference. When connecting, pay attention to the PLC input response time. The rotary encoder also has a shielded wire, which must be grounded during use to improve interference resistance. Encoder ----------- PLC.A ----------------- X0.B ----------------- X1.Z ------------------ X2. +24V ------------ +24V.COM ------------- -24V ----------- COM

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