Resolver is a kind of commonly used angle detection component, because of its simple structure, reliable operation, and its accuracy can meet the general detection requirements
Generally, the signal obtained from the photoelectric detection device of the encoder is low in level and irregular in waveform, and cannot be directly used for control, signal processing and long-distance transmission, so it is necessary to amplify and shape the signal in the encoder. The processed output signal is generally similar to sine wave or rectangular wave. Because the rectangular wave output signal is easy to be digitally processed, it is widely used in control system. The signal...
Each position of the absolute encoder corresponds to a certain digital code, so its indication value is only related to the starting and ending positions of measurement, and has nothing to do with the intermediate process of measurement.
Encoders can be divided into contact type and non-contact type according to the reading mode. According to the working principle, encoders can be divided into incremental and absolute types. Incremental encoder converts displacement into periodic electrical signal, and then converts this electrical signal into counting pulse, and the displacement is expressed by the number of pulses.
The shield wire of encoder cable is not connected or falls off: this will lead to interference signal, make the waveform unstable, affect the accuracy of communication, it is necessary to ensure the reliable welding and grounding of shielding wire.
Good quality Resolver for business High speed end installation: it is installed at the shaft end (or gear connection) of the power motor. This method has the advantages of high resolution. Since there are 4096 cycles of multi turn encoder and the number of motor rotations within this range, the resolution can be improved by full range. The disadvantage is that there is gear clearance error when the moving object passes through the decelerated gear. It is generally used for unidirectional...
Loose installation of encoder: this kind of fault will affect the position control accuracy, cause the position deviation in stopping and moving to exceed the tolerance, and even cause the overload alarm of servo system as soon as the machine is started. Please pay special attention.
Absolute pulse encoder: APC incremental pulse encoder: SPC both are generally used in speed control or position control system detection components. Rotary encoder is used to measure the speed of the device. It can be divided into single output and double output. The main technical parameters are the number of pulses per revolution (dozens to thousands), and power supply voltage. The single output means that the output of rotary encoder is a group of pulses, while the two-way output rotary...
Encoders are generally divided into incremental and absolute encoders, and they have the biggest difference: in the case of incremental encoders, the position is determined by the number of pulses calculated from the zero mark, while the position of absolute encoders is Determined by the reading of the output code.
A rotary encoder that outputs the rotation angle in absolute code. Read the code to detect the rotation position. No need to return to origin when starting.
Anti-electromagnetic interference, multi-pulse, aluminum alloy. Used to measure the rotation acceleration, length, speed and angle of objects.
At present, absolute encoders have been widely used in textile machinery, irrigation machinery, paper printing, water conservancy gates, robots and mechanical arms, port cranes, steel metallurgical equipment, heavy machinery equipment, precision measuring equipment, machine tools, food machinery, etc. field.
Since absolute encoders are significantly better than incremental encoders in positioning, they have been increasingly used in industrial control positioning.
The absolute encoder has the uniqueness of each position determined by the mechanical position. It does not need to be memorized, does not need to find a reference point, and does not need to be counted all the time. When it needs to know the position, when to read its position. In this way, the anti-interference characteristics of the encoder and the reliability of the data are greatly improved.
According to the detection principle, encoders can be divided into optical, magnetic, inductive and capacitive. According to its scale method and signal output form, it is divided into incremental encoder and absolute encoder.
Incremental encoder--converts the displacement into a periodic electric signal, and then converts this electric signal into a counting pulse, and the number of pulses represents the magnitude of the displacement. When the shaft rotates, there is a corresponding pulse output, and its counting starting point can be set arbitrarily, which can realize multi-turn infinite accumulation and measurement.
Multi-turn absolute encoder ---- Using the principle of clock gear mechanism, when the center code disc rotates, another set of code discs (or multiple sets of gears, multiple sets of code discs) are driven by gears, based on single-turn encoding The code for the number of turns is added to expand the measuring range of the encoder. The code is determined by the mechanical position, and each position code is unique and does not repeat, and does not need to be memorized.
The encoder is just a small part. But it may be used on machines that no one has even thought about. Now, we all know that the encoder is used in conjunction with the motor. There are millions of possibilities in the world, and the combination of an encoder and a motor is only a drop in the ocean, and it has more applications that you would never expect.
The encoder controls the motor to move the elevator. Because the elevator moves up and down through the rotation of the motor, as long as the direction of rotation is clear, it can be judged whether the elevator is rising or falling.
The encoder can detect the amount of movement (number of rotations) of the motor, so that you can know how much the elevator has moved. Using the information provided by these encoders through the elevator control panel, the elevator can quickly and smoothly reach the designated floor.
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