During the operation of the balancing machine, measuring the rotational speed is a very important part of the work, and measuring the rotational speed is a prerequisite because the centrifugal force F=mr ω²， There are many factors that affect the instability of rotational speed, and the technicians from Shenman Dynamic Balancing Machine Factory analyze the following for everyone:
1. Check if the speed signal line is connected correctly. If not, connect it correctly and try again;
2. Open the industrial control chassis, reinsert and unplug the 20 core white power plug on the power supply backplane, and then try again;
3. Check if the three core power supply between the power supply board and the filter board is normal;
Below is an explanation based on different models of dynamic balancing machines:
1. Universal joint dynamic balancing machine: Its rotational speed is measured by a magnetoelectric sensor near the spindle in the headstock. After being energized, a magnetic sensor generates a magnetic field. When it approaches steel, it is induced to generate an electrical signal. When the spindle rotates and the screw fixed on the spindle approaches the sensor, the sensor is induced to generate an electrical signal, which is input to the industrial computer. If the magnetoelectric sensor is damaged or the position relative to the screw on the spindle is not suitable, it can cause unstable speed. At this time, the sensor can be replaced or the position of the sensor can be adjusted.
2. Circle driven balancing machine: The rotational speed is detected by a photoelectric sensor. There is a transmitting and receiving indicator light in front of the photoelectric sensor, and a label is attached to the end of the workpiece shaft. When the rotor rotates, the photoelectric sensor and the label induce an electrical pulse, which is transmitted to the industrial control computer. (Note that for each revolution of the rotor, the photoelectric sensor signal can only be switched once.) If there is oil or rust on the shaft end of the workpiece, it can cause multiple electrical pulses to be generated during rotor rotation, resulting in inaccurate speed measurement. At this point, the shaft end of the workpiece can be cleaned, or the brightness of the photoelectric sensor can be adjusted to eliminate the fault. Signal interference can also cause speed pulsation. Check if the ground wire is securely connected. If none of the problems can be solved, it is possible that the sensor is damaged.
3. Vertical balancing machine: The old product uses a photoelectric sensor to detect the speed. There is an induction iron plate installed at the rear end of the balancing machine spindle, which rotates synchronously with the spindle. There is a transmitting and receiving indicator light in front of the photoelectric sensor. When the rotor rotates, the photoelectric sensor generates an electrical pulse when it approaches the iron plate, which is transmitted to the industrial control computer. (Note that for each revolution of the rotor, the photoelectric sensor signal can only be switched once.) If the iron sheet has oil stains or rust, it can cause multiple electrical pulses to be generated during rotor rotation, resulting in inaccurate speed measurement. At this point, the iron sheet can be cleaned or the brightness of the photoelectric sensor can be adjusted to eliminate the fault. The current sensors have been changed from photoelectric to magnetoelectric. The magnetoelectric sensor generates a magnetic field after being energized. When it approaches steel, it is induced to generate an electrical signal. When the spindle rotates and the iron plate fixed on the spindle approaches the sensor, the sensor is induced to generate an electrical signal, which is fed into the industrial computer. If the magnetoelectric sensor is damaged or the position relative to the iron plate on the spindle is not suitable, it can cause unstable speed. At this time, the sensor can be replaced or the position of the sensor can be adjusted.
4. In addition, for equipment with frequency converters, the interference of the frequency converter can cause unstable speed. It can be confirmed that the grounding wires of the frequency converter, microcomputer, motor, etc. are well connected to eliminate the interference. The speed interference generated by the frequency converter is manifested as a change in speed every certain period of time, and the speed will not jump randomly, which is different from the performance of photoelectric sensors or magnetoelectric sensors on the impact of speed.
5. The sensor should flash once and the LED on the filter board of the industrial control computer connected to it should also flash once. If it does not flash, there may be a problem with the industrial control computer. Generally, it is replaced as a whole and then returned to the company for testing.
6. If there is no problem with the industrial computer or sensor, it may be due to a problem with the connecting wire between the sensor and the industrial computer.
1. Check if the speed signal line is connected correctly. If not, connect it correctly and try again;
2. Open the industrial control chassis, reinsert and unplug the 20 core white power plug on the power supply backplane, and then try again;
3. Check if the three core power supply between the power supply board and the filter board is normal;
Below is an explanation based on different models of dynamic balancing machines:
1. Universal joint dynamic balancing machine: Its rotational speed is measured by a magnetoelectric sensor near the spindle in the headstock. After being energized, a magnetic sensor generates a magnetic field. When it approaches steel, it is induced to generate an electrical signal. When the spindle rotates and the screw fixed on the spindle approaches the sensor, the sensor is induced to generate an electrical signal, which is input to the industrial computer. If the magnetoelectric sensor is damaged or the position relative to the screw on the spindle is not suitable, it can cause unstable speed. At this time, the sensor can be replaced or the position of the sensor can be adjusted.
2. Circle driven balancing machine: The rotational speed is detected by a photoelectric sensor. There is a transmitting and receiving indicator light in front of the photoelectric sensor, and a label is attached to the end of the workpiece shaft. When the rotor rotates, the photoelectric sensor and the label induce an electrical pulse, which is transmitted to the industrial control computer. (Note that for each revolution of the rotor, the photoelectric sensor signal can only be switched once.) If there is oil or rust on the shaft end of the workpiece, it can cause multiple electrical pulses to be generated during rotor rotation, resulting in inaccurate speed measurement. At this point, the shaft end of the workpiece can be cleaned, or the brightness of the photoelectric sensor can be adjusted to eliminate the fault. Signal interference can also cause speed pulsation. Check if the ground wire is securely connected. If none of the problems can be solved, it is possible that the sensor is damaged.
3. Vertical balancing machine: The old product uses a photoelectric sensor to detect the speed. There is an induction iron plate installed at the rear end of the balancing machine spindle, which rotates synchronously with the spindle. There is a transmitting and receiving indicator light in front of the photoelectric sensor. When the rotor rotates, the photoelectric sensor generates an electrical pulse when it approaches the iron plate, which is transmitted to the industrial control computer. (Note that for each revolution of the rotor, the photoelectric sensor signal can only be switched once.) If the iron sheet has oil stains or rust, it can cause multiple electrical pulses to be generated during rotor rotation, resulting in inaccurate speed measurement. At this point, the iron sheet can be cleaned or the brightness of the photoelectric sensor can be adjusted to eliminate the fault. The current sensors have been changed from photoelectric to magnetoelectric. The magnetoelectric sensor generates a magnetic field after being energized. When it approaches steel, it is induced to generate an electrical signal. When the spindle rotates and the iron plate fixed on the spindle approaches the sensor, the sensor is induced to generate an electrical signal, which is fed into the industrial computer. If the magnetoelectric sensor is damaged or the position relative to the iron plate on the spindle is not suitable, it can cause unstable speed. At this time, the sensor can be replaced or the position of the sensor can be adjusted.
4. In addition, for equipment with frequency converters, the interference of the frequency converter can cause unstable speed. It can be confirmed that the grounding wires of the frequency converter, microcomputer, motor, etc. are well connected to eliminate the interference. The speed interference generated by the frequency converter is manifested as a change in speed every certain period of time, and the speed will not jump randomly, which is different from the performance of photoelectric sensors or magnetoelectric sensors on the impact of speed.
5. The sensor should flash once and the LED on the filter board of the industrial control computer connected to it should also flash once. If it does not flash, there may be a problem with the industrial control computer. Generally, it is replaced as a whole and then returned to the company for testing.
6. If there is no problem with the industrial computer or sensor, it may be due to a problem with the connecting wire between the sensor and the industrial computer.
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