What are the common sensor failures and their solutions for brushless motor motor automatic needle bearing press-in machine?
Brushless motor motor automatic needle bearing press-in machine common sensor failure and its solution are as follows:
1、Pressure sensor failure
Failure performance
Pressure display abnormality: in the process of pressing in, the pressure value displayed by the pressure sensor does not match with the actual pressing force, and the pressure value may be high, low or fluctuating too much.
No pressure signal output: the control system of the equipment can not receive the signal from the pressure sensor, resulting in the press-in process can not be carried out normally or the pressure monitoring.
Failure causes
Damage to the sensor: Long-term use or impact, vibration and other external forces, resulting in damage to the strain gauges and electronic components inside the pressure sensor.
Wiring failure: The wires connecting the pressure sensor are broken, short-circuited or have poor contact, affecting the transmission of signals.
Calibration problem: The pressure sensor is not calibrated regularly, resulting in a decrease in measurement accuracy.
Solution
Replace the sensor: After confirming that the sensor is damaged, replace the pressure sensor with one of the same type and specification in a timely manner.
Check the wiring: Use a multimeter or other tools to check the through and through situation of the wiring, repair or replace the damaged wires to ensure a firm connection.
Re-calibration: In accordance with the calibration procedure of the pressure sensor, calibrate the sensor regularly to ensure accurate measurement.
2、Displacement sensor failure
Failure performance
Inaccurate position measurement: the position of the needle bearing indentation measured by the displacement sensor deviates from the actual position, resulting in the depth of indentation does not meet the requirements.
Sensor signal instability: the displacement sensor output signal is sporadic or fluctuates greatly, affecting the precise control of the equipment on the press-in position.
Failure causes
Improper installation of the sensor: the installation position of the displacement sensor is inaccurate, not firmly fixed, displacement or vibration occurs during the operation of the equipment, affecting the measurement accuracy.
Sensor wear: the probe or sensing element of the displacement sensor is worn after long-term use, resulting in inaccurate signal reception and transmission.
Electromagnetic interference: the electromagnetic environment around the equipment is complex, electromagnetic interference affects the signal transmission and processing of the displacement sensor.
Solution
Reinstall the sensor: According to the installation requirements of the equipment, readjust the installation position of the displacement sensor to ensure that it is firmly installed to avoid vibration and displacement.
Replace worn parts: Replace worn displacement sensor probes or sensing elements, or directly replace the entire displacement sensor.
Take anti-interference measures: shielding the signal line of the displacement sensor, or install electromagnetic shielding devices around the sensor to reduce electromagnetic interference.
3, photoelectric sensor failure
Failure performance
Misdetection: photoelectric sensor in the absence of needle bearings or workpiece, misjudging the presence of objects, resulting in equipment malfunction; or in the presence of needle bearings or workpiece, failed to detect correctly, so that the equipment can not be normal startup or the next step of the operation.
Abnormal detection distance: The effective detection distance of the photoelectric sensor has changed, and the object cannot be detected accurately within the specified distance.
Failure causes
Dirty sensor surface: the photoelectric sensor's transmitting or receiving end of the surface of the dust, oil and other dirt, affecting the emission and reception of light.
Aging of the light source: photoelectric sensor light source (such as light-emitting diodes) used for too long, the light-emitting intensity is weakened, resulting in a decline in detection performance.
Improperly set sensor parameters: photoelectric sensor detection distance, sensitivity and other parameters are set unreasonably, not adapted to the actual working environment.
Solution
Clean the sensor: Clean the surface of the photoelectric sensor regularly with a clean cloth or special cleaner to ensure smooth light transmission.
Replace the light source or sensor: If the light source is aging, replace the light source with a new one; if the performance of the whole sensor decreases seriously, consider replacing the photoelectric sensor.
Adjustment of parameters: According to the actual working conditions, readjust the detection distance, sensitivity and other parameters of the photoelectric sensor, so that it can reach an excellent working condition.
4、Temperature sensor failure
Failure performance
Temperature display error: the temperature displayed by the temperature sensor does not match the actual temperature, which may lead to the failure of the equipment to monitor the temperature of the brushless motor or needle roller bearings.
False triggering or non-triggering of over-temperature alarm: When the actual temperature of the equipment reaches the over-temperature alarm setting value, the temperature sensor fails to send out the alarm signal in time; or when the temperature is normal, the over-temperature alarm signal is sent out by mistake.
Failure causes
Sensor probe failure: poor contact between the probe of the temperature sensor and the measured object, or the probe itself is damaged, resulting in inaccurate temperature measurement.
Signal transmission problems: the signal transmission line of the temperature sensor is interfered or damaged, affecting the accurate transmission of temperature signals.
Sensor aging: After long-term use of the temperature sensor, its performance will gradually decline, resulting in lower measurement accuracy.
Solution
Check the probe: Check the contact between the temperature sensor probe and the measured object to ensure good contact; if the probe is damaged, replace it in time.
Examine the signal transmission line: check whether the signal transmission line is broken, short-circuit and other problems, repair or replace the line; take anti-interference measures, such as shielding the line.
Replacement of sensors: For the aging temperature sensor, replace the new sensor in time to ensure the accuracy and reliability of temperature measurement.
※ If the above ways and means still can not solve the equipment failure, please contact Xinhui Electromechanical Equipment Co., Ltd. technical specialists through the page chat tool to seek help.
