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The principle and use of incremental encoder
2021 / 01 / 02
An encoder is a device that converts an angular displacement or a linear displacement into an electrical signal. According to the working principle, the encoder can be divided into two types: incremental (SPC) and absolute (APC). The incremental encoder converts the displacement into a periodic electrical signal, which is then converted into a counting pulse, and the number of pulses is used to represent the magnitude of the displacement. Here is some introduction to incremental encoders. 1. working principle The working principle of the photoelectric incremental encoder is as follows: the pulse code disc rotating together with the rotating shaft has a uniformly engraved grating, and a plurality of transparent sections and shading sections are evenly distributed on the code disc. Incremental encoders do not have a fixed starting zero. The output is a pulse proportional to the increment of the corner. A counter is required to count the number of pulses. Each time a light transmissive area is rotated, a pulse signal is sent, the curren
Incremental encoder phase alignment
2021 / 01 / 02
The output signal of the incremental encoder is a square wave signal, which can be divided into an incremental encoder with a commutation signal and a conventional incremental encoder. The ordinary incremental encoder has a two-phase orthogonal square wave. Pulse output signals A and B, and zero-bit signal Z; Incremental encoder with commutation signal, in addition to the ABZ output signal, also has the number of revolutions per revolution of the electronic commutation signal with 120 degrees difference from each other and the motor rotor The number of magnetic poles is the same. The alignment of the phase of the UVW electronic commutation signal with the incremental encoder with the commutation signal and the phase of the rotor pole, or the phase of the electrical angle are as follows: 1. Use a DC power supply to pass the DC winding of the motor to a DC current less than the rated current, U in, V out, to orient the motor shaft to an equilibrium position; 2. Observe the U phase signal and Z signal of the encoder with an oscilloscope; adjust the relative position of the encoder shaft and the motor shaft, or the relative position of the encoder housing and the motor housing, according to the convenience of operation; 3. While adjusting, observe the U-phase signal edge of the encoder and the Z signal until the Z signal is stable at a high level (in this case, the normal state of the Z signal is low), and lock the encoder to the motor. Positional relationship; Reverse the motor shaft back and forth. After releasing the hand, if the motor shaft is free to return to the equilibrium position each time, the Z signal can be stabilized at a high level, and the alignment is effective. After removing the DC power supply, verify as follows: Observe the U phase signal of the encoder and the UV back EMF waveform of the motor with an oscilloscope; When the motor shaft is rotated, the rising edge of the U-phase signal of the encoder
Distinction between incremental encoder and absolute encoder
2021 / 01 / 01
Encoders can be divided into incremental pulse encoders: SPC and pulse encoders: APC based on the signal principle. Both are generally applied to the detection elements of speed control or position control systems. The distinction between incremental encoders and encoders. An encoder is a device that generates an information expression form according to a given code. It is a device that compiles and converts signals (such as bit streams) or data into signal forms that can be used for communication, transmission, and storage. It is a device that compiles and converts signals (such as bit streams) or data into signals that can be used for communication, transmission, and storage. Here, I recommend several encoders for you to facilitate your purchase. SM-D2100MPEG2 single-channel encoder is an easy-to-use, powerful MPEG-2 encoder. Supports various standard video and audio signals, including analog component S-VIDEO, analog composite video, and mono or analog stereo. The compressed data output format is ASI / SPI. Compression method MPEG-2MP @ ML, the encoder encodes and multiple
From incremental encoder to absolute multiturn encoder - News - Global IC Trade Starts Here
2021 / 01 / 01
Incremental value rotary encoder, also called circular grating, pulse code disc, can be known from these names, it is a circular grating reticle code disc, after rotation, through the light and dark changes of the luminous flux, generate pulses, counting pulses through external devices To incrementally add (or subtract) the number of pulses to measure the angle of rotation. For example, a circular grating engraves 360 engraved lines per week, and one pulse generated by each engraving line is equivalent to 1 degree, and the cumulative pulse is increased by 30, which is 30 degrees in the positive direction. In fact, there are two (or four) optical eyes for reading these reticle lines, and each of the two optical eyes outputs phase A in phase B to determine from which direction the reticle is coming from, and A is ahead of B. Or B is ahead of A, just like the left and right eyes of a person, so that the direction of rotation of the encoder is known, so that the count of the pulse is incremented or decremented, thereby obtaining a true rotation angle. In actual use, the position of phase A and phase B differ by 1/4 pulse period, so that it is 1/4 cycle difference from the positive direction and 3/4 from the opposite direction, which can be used to determine the direction of rotation. If a pulse
Pump decoupling solution problem analysis and incremental reform
2020 / 05 / 14
Pump decoupling solution problem analysis and incremental reform 1 Introduction The decarburization system in our workshop adopts the hot potash method to remove CO2 from the low volatility gas to provide a qualified hydrogen-nitrogen mixture for ammonia synthesis and at the same time provides CO2 gas with purity greater than 98% for urea production. The solution circulation is mainly provided by a solution pump (decarburization pump). The pump from the seventies imported from Japan, the technical parameters in Table 1. The pump performance is good, simple operation, stable operation. Especially MVB2830B type supporting motor, stable operation, the use of over 20 years has never been overhauled. Over the years, due to the low system load, the normal process flow required for less than 200m3 / h, much less than the pump design capacity of 480m3 / h. In order to reduce power consumption, in 92 years its impeller cylindrical cutting, to achieve the use effect. However, since the first phase of fertilizer "8.13" was put into operation in 1999, the required process flow increased to 240 m3 / h. According to the reconstruction group accounting, and the impeller to restore the original large impeller, basically meet the production requirements at the time. In 2001, the second phase of fertilizer "8.13" was put into operation, and the required process flow increased to 280m3 / h. At this time, the problem was prominently exposed, the flow of large pump could no long
DP communication absolute encoder assignment method - Database & Sql Blog Articles
2020 / 04 / 29
DP communication absolute encoder assignment method - Database & Sql Blog Articles Factory direct 0805 red light quality absolutely guaranteed price absolute advantage AD brand ADUM1402ARWZ special treatment original imported absolutely original Programmable Package SG-8018CA(SG7050C) 0.67M~170M
Lathe Z-axis absolute encoder back to reference point - Database & Sql Blog Articles
2020 / 04 / 29
Lathe Z-axis absolute encoder back to reference point - Database & Sql Blog Articles Factory direct 0805 red light quality absolutely guaranteed price absolute advantage AD brand ADUM1402ARWZ special treatment original imported absolutely original Programmable Package SG-8018CA(SG7050C) 0.67M~170M
Detailed graphic analysis encoder correct wiring method
2020 / 04 / 23
Detailed graphic analysis encoder correct wiring method The correct wiring method for the encoder: (1) Correct wiring is very important. Figure 1 shows the wiring principle of the NPN output incremental type E6B2-CWZ6C. Figure 2 shows the actual wiring of the NPN output incremental type E6B2-CWZ6C. The brown line is connected to the positive pole of the power supply and the blue line is connected. The negative pole of the power supply, the black line is connected to input 0.00, the white line is connected to input 0.01, the orange line is connected to input 0.04, and the PLC's COM is connected to the positive pole of the power supply. (2) The following figure shows the actual wiring diagram of the PNP output incremental type E6B2-CWZ6B. The brown line is connected to the positive pole of the power supply, the blue line is connected to the negative pole of the power supply, the black line is connected to input 0.00, the white line is connected to input 0.01, and the orange line is connected to input 0.04. The COM of the PLC is connected to the negative pole of the power supply.
Detailed graphic analysis encoder correct wiring method
2020 / 04 / 23
Detailed graphic analysis encoder correct wiring method The correct wiring method for the encoder: (1) Correct wiring is very important. Figure 1 shows the wiring principle of the NPN output incremental type E6B2-CWZ6C. Figure 2 shows the actual wiring of the NPN output incremental type E6B2-CWZ6C. The brown line is connected to the positive pole of the power supply and the blue line is connected. The negative pole of the power supply, the black line is connected to input 0.00, the white line is connected to input 0.01, the orange line is connected to input 0.04, and the PLC's COM is connected to the positive pole of the power supply. (2) The following figure shows the actual wiring diagram of the PNP output incremental type E6B2-CWZ6B. The brown line is connected to the positive pole of the power supply, the blue line is connected to the negative pole of the power supply, the black line is connected to input 0.00, the white line is connected to input 0.01, and the orange line is connected to input 0.04. The COM of the PLC is connected to the negative pole of the power supply.
Detailed graphic analysis encoder correct wiring method
2020 / 04 / 23
Detailed graphic analysis encoder correct wiring method The correct wiring method for the encoder: (1) Correct wiring is very important. Figure 1 shows the wiring principle of the NPN output incremental type E6B2-CWZ6C. Figure 2 shows the actual wiring of the NPN output incremental type E6B2-CWZ6C. The brown line is connected to the positive pole of the power supply and the blue line is connected. The negative pole of the power supply, the black line is connected to input 0.00, the white line is connected to input 0.01, the orange line is connected to input 0.04, and the PLC's COM is connected to the positive pole of the power supply. (2) The following figure shows the actual wiring diagram of the PNP output incremental type E6B2-CWZ6B. The brown line is connected to the positive pole of the power supply, the blue line is connected to the negative pole of the power supply, the black line is connected to input 0.00, the white line is connected to input 0.01, and the orange line is connected to input 0.04. The COM of the PLC is connected to the negative pole of the power supply.
The principle and use of incremental encoder
2020 / 01 / 29
An encoder is a device that converts an angular displacement or a linear displacement into an electrical signal. According to the working principle, the encoder can be divided into two types: incremental (SPC) and absolute (APC). The incremental encoder converts the displacement into a periodic electrical signal, which is then converted into a counting pulse, and the number of pulses is used to represent the magnitude of the displacement. Here is some introduction to incremental encoders. 1. working principle The working principle of the photoelectric incremental encoder is as follows: the pulse code disc rotating together with the rotating shaft has a uniformly engraved grating, and a plurality of transparent sections and shading sections are evenly distributed on the code disc. Incremental encoders do not have a fixed starting zero. The output is a pulse proportional to the increment of the corner. A counter is required to count the number of pulses. Each time a light transmissive area is rotated, a pulse signal is sent, the current value of the counter is incremented by 1, and the count result corresponds to the increment of the cor
The working principle of the encoder
2020 / 01 / 22
The working principle of the encoder First, the photoelectric encoder works An optical encoder is a sensor that converts mechanical geometric displacements on an output shaft into pulses or digital quantities by photoelectric conversion. This is the head Before the most widely used sensor, the photoelectric encoder was composed of a grating disk and a photoelectric detection device. The grating disk is equally divided on a circular plate of a certain diameter Open a number of rectangular holes. Since the photoelectric encoder and the motor are coaxial, when the motor rotates, the grating disk rotates at the same speed as the motor and transmits A detection device composed of an electronic diode such as a photodiode detects and outputs a plurality of pulse signals, and a schematic diagram thereof is shown in FIG. 1; by calculating light per second The number of pulses output by the electric encoder can reflect the current motor speed. In addition, to determine the direction of rotation, the code disc can also provide phase difference 90o two-way pulse signal. According to the detection principle, encoders can be classified into optical, magnetic, inductive and capacitive. According to its calibration method and signal output form, it can be divided For the incremental, absolute and mixed three.
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Address:333Feiyue Donglu, Changchun City, Jilin Province. China, Changchun, Jilin
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