German Nanotec encoder Nanotec model Nanotec price

Nanotec encoders are devices that encode signals (such as bitstreams) or data into signal forms suitable for communication, transmission, and storage. Encoders convert angular displacement or linear displacement into electrical signals; the former is called a code disk, and the latter a code scale. According to the readout method, encoders can be divided into contact and non-contact types; according to working principle, encoders can be divided into incremental and absolute types. An incremental encoder converts displacement into periodic electrical signals, which are then converted into counting pulses, using the number of pulses to indicate the magnitude of displacement. Each position of an absolute encoder corresponds to a specific digital code, so its indication depends only on the start and end positions of the measurement, not on the intermediate process. The Encoder is a type of Sensor, mainly used to detect the speed, position, angle, distance, or count of mechanical motion. In addition to mechanical applications, many motor controls, such as servo motors, require encoders for the motor controller to perform commutation, speed, and position detection. Encoders can be classified as follows. Classification by code disk perforation method: 1) Incremental type: emits a pulse signal for each unit of angle rotated (some emit sine/cosine signals, which are then subdivided to chop out higher-frequency pulses), typically with A-phase, B-phase, or Z-phase output. The A-phase and B-phase outputs are pulses delayed by 1/4 cycle relative to each other; the direction of rotation can be distinguished based on the delay relationship, and 2x or 4x frequency multiplication can be achieved by using the rising and falling edges of the A-phase and B-phase signals. The Z-phase is a single-turn pulse, emitting one pulse per revolution. 2) Absolute type: for each reference angle within one revolution, it emits a unique binary value corresponding to that angle, allowing multiple positions to be recorded and measured via external circle-counting devices. Classified by signal output type: voltage output, open-collector output, push-pull complementary output, and line-driver output. Classification by mechanical mounting form: 1) Shaft type: shaft types can be further divided into clamping flange, synchronous flange, and servo mount types. 2) Hollow shaft type: hollow shaft types can be further divided into semi-hollow, fully hollow, and large-bore types. Classified by working principle: photoelectric, magneto-electric, and contact brush types.

Nanotec encoder form classification

Shaft type: shaft types can be further divided into clamping flange, synchronous flange, and servo mount types. Hollow shaft type: hollow shaft types can be further divided into semi-hollow, fully hollow, and large-bore types. Classified by working principle: photoelectric, magneto-electric, and contact brush types. Encoders can be divided into incremental and absolute types based on the code disk perforation method. An incremental encoder converts displacement into periodic electrical signals, which are then converted into counting pulses, using the number of pulses to indicate the magnitude of displacement. Each position of an absolute encoder corresponds to a specific digital code, so its indication depends only on the start and end positions of the measurement, not on the intermediate process. A rotary incremental encoder outputs pulses during rotation, and its position is determined by counting equipment. When the encoder is stationary or power is lost, the position is retained in the internal memory of the counting equipment. Thus, after a power loss, the encoder must not move; otherwise, if pulses are lost due to interference during output upon power restoration, the zero point remembered by the counting equipment will shift. The amount of this shift is unknown until erroneous production results occur. The solution is to add a reference point; each time the encoder passes the reference point, the reference position corrects the memory position of the counting equipment. Before the reference point, position accuracy cannot be guaranteed. Therefore, in industrial control, methods such as finding the reference point before each operation or homing at startup are used. For example, the positioning of printers and scanners uses the incremental encoder principle; every time they are powered on, we hear a rattling sound as they search for the reference zero point before starting work. This method is troublesome for some industrial control projects, or even prohibited where accurate position must be known immediately after startup (no homing allowed), leading to the emergence of absolute encoders. Absolute rotary photoelectric encoders, because each position is absolutely unique, anti-interference, and requires no power-loss memory, are increasingly widely used for angle, length measurement, and positioning control in various industrial systems. The optical code disk of an absolute encoder has many tracks of lines, arranged sequentially with 2 line, 4 line, 8 line, and 16 line. Thus, at each position of the encoder, by reading the light/dark state of each track, a unique 2-ary code (Gray code) from the zeroth power of 2 to the n-1th power of 2 is obtained. This is called an n-bit absolute encoder. Such an encoder is determined by the mechanical position of the code disk and is unaffected by power loss or interference. The uniqueness of each position determined by the mechanical position means the absolute encoder requires no memory, no reference point search, and no continuous counting; the position is read whenever needed. This greatly improves the encoder's anti-interference characteristics and data reliability. Since absolute encoders are significantly superior to incremental encoders in positioning, they are increasingly used in industrial control positioning. Due to the high precision and large number of output bits of absolute encoders, if parallel output were still used, every bit output signal would need to ensure good connection, and isolation would be required for complex conditions, resulting in many cable cores, causing inconvenience and reduced reliability. Therefore, for multi-bit output types, absolute encoders generally use serial or bus output. The most common serial output for German-produced absolute encoders is SSI.

Nanotec encoder working principle

The optical code disk of the series absolute encoder has many optical channel tracks, arranged sequentially with 2 line, 4 line, 8 line, and 16 line. At each position of the encoder, by reading the light/dark state of each track, a unique 2-ary code (Gray code) from the zeroth power of 2 to the n-1th power of 2 is obtained. This is called an n-bit absolute encoder. Such an encoder is determined by the mechanical position of the optical code disk and is unaffected by power loss or interference. The absolute encoder determines the code by mechanical position; it requires no memory, no reference point search, and no continuous counting. The position is read whenever needed. This greatly improves the encoder's anti-interference characteristics and data reliability.

Nanotec 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). Classified by signal principle, there are incremental encoders and absolute encoders. We typically use incremental encoders, which can input output pulse signals directly to the PLC, using the PLC's high-speed counter to count the pulse signals to obtain measurement results. Different models of rotary encoders have different numbers of output pulse phases; some output A, B, and Z three-phase pulses, some only have A and B two phases, and the simplest has only A phase. 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 gate output type). The encoder power can be an external supply or directly use the PLC's DC24V power. The power "-" 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 90-degree phase difference. The Z phase signal has only one pulse per encoder revolution, 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 anti-interference. Encoder ----------- PLC.A ----------------- X0.B ----------------- X1.Z ------------------ X2. +24V ------------ +24V.COM ------------- -24V ----------- COM

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