How to adjust the absolute phase alignment of type encoder?
Some friends to the absolute value of the rotary encoder phase alignment is not very understanding, under the electronic account for everyone today phase alignment methods and steps of the absolute rotary encoder, hope to help everyone's work. For single circle and circle phase alignment of absolute rotary encoder, a huge difference, actually are aligned in a circle of encoder testing phase and electrical mechanical and electrical Angle of phase. Rotary encoder will of the absolute value of early phase is given in a separate pin lap top level, using the level 0 and 1 flip, also can realize the encoder and motor phase alignment, specific operation method is as follows: 1. With a dc power supply to the motor windings of UV flux to less than the rated current of dc, U, V, and the motor shaft orientation to an equilibrium position; 2. Using oscilloscope to observe the highest absolute encoder count level signal; 3. The relative position of adjust the encoder shaft and motor shaft; 4. Adjustment, while observing the highest count signal jump down, until the jump along the equilibrium position accurately in the motor shaft orientation, relationship with the relative position of the motor lock encoder; 5. Back and forth to reverse the motor shaft, after, if the motor shaft every time free to return to balance position, can accurate emersion jump along, the alignment is effective. Such absolute rotary encoder has now been adopted EnDAT, BiSS, Hiperface serial protocol, as well as the Japanese special serial protocol of the new type of absolute rotary encoder replace extensively, and thus the highest signal will not exist, the method of alignment encoder and motor phase change, one of the very practical method is to use the encoder block internal EEPROM, random storage encoder installed on the motor shaft after the measured phase, specific operation method is as follows: 1. Will be randomly installed on the motor encoder, the consolidation encoder shaft and motor shaft, as well as the encoder housing and motor shell; 2. With a dc power supply to the motor windings of UV flux to less than the rated current of dc, U, V, and the motor shaft orientation to an equilibrium position; 3. With servo drives read lap position value of the absolute encoder, and deposited in the encoder internal records motor block initial phase Angle of EEPROM; 4. The alignment process is over. Because the motor shaft has been directed in phase - electric Angle 30 degrees of direction, so deposited in the position of encoder block internal EEPROM values - for the motor Angle 30 degrees phase. Since then, the drive will lap position detection data at any time with the stored value is poor, and according to the motor of logarithmic necessary conversion, plus. . . 30 degrees, you can get the motor Angle phase of the moment. This alignment needs to support and cooperate with the encoder and the servo drivers can achieve, Japanese servo encoder phase is the root cause of the end users directly to adjust is not willing to provide the user with the function interface and operation method of the alignment. The alignment method is one of the big advantage is that only need to provide to determine the phase sequence and the direction of the rotor windings directional current, without adjusting the encoder and the Angle of the relationship between the motor shaft, thus the encoder can be directly installed on the machine in an arbitrary initial Angle, without careful, even a simple adjustment process, simple operation, good manufacturability. If neither absolute rotary encoder available block of EEPROM, and not available for detecting the highest count of a pin, the alignment method relatively complex. If the driver supports single ring absolute position information read and display, can be considered according to the following methods: 1. With a dc power supply to the motor windings of UV flux to less than the rated current of dc, U, V, and the motor shaft orientation to an equilibrium position; 2. Using servo drive reads and displays a lap position of absolute encoder values; 3. The relative position of adjust the encoder shaft and motor shaft; 4. After the adjustment, make show fully close to lap absolute position according to motor of logarithm conversion out - Angle of 30 degrees electric lap absolute position, should by locking motor encoder and the relative position relations; 5. Back and forth to reverse the motor shaft, after, if every time the motor shaft free to return to balance position, can accurate emersion the conversion points, aligned is effective. If the user even unable to obtain the absolute value information, then it can only by the original factory specialized equipment and tooling, detecting absolute position values, while detecting motor phase Angle, using the tooling, we must adjust the relationship between the relative angular position encoder and motor, the encoder phase alignment with mechanical and electrical Angle phase, then lock. As a result, the user is more not to solve the problem of phase alignment of the encoder. Everyone at ordinary times is carried out in accordance with the above method to align and verify? If you have any questions can call electronic to discuss. Shanghai electronic products co. , LTD. , specializing in the production of rotary encoder, 25 years up to 70000 varieties in products, widely used in automotive electronics, home electronics, multimedia, mixer, interphone, electronic toys, household, aerospace, military industry and other fields. 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