What are the common sensor failures and their solutions for motor manual 3-in-1 servo presses?
Motor rotor manual three-in-one servo press common sensor failures and solutions are as follows:
1, pressure sensor failure
l Fault phenomenon
Pressure display abnormality: unstable pressure values, fluctuations; display value and the actual pressure value deviation is obvious; pressure display is zero or beyond the range.
Pressure control failure: in the process of pressing and loading, the pressure cannot be controlled according to the set pressure, resulting in too large or too small pressing and loading force.
l Failure causes
Sensor damage: long-term use of the sensor caused by internal component aging, damage; external impact, extrusion, resulting in physical damage to the sensor.
Wiring problems: the sensor's wiring is loose, off; wiring oxidation, short circuit, affecting the signal transmission.
Improper installation: inaccurate installation position of the sensor, uneven force; poor sealing during installation, resulting in media leakage affecting the measurement.
Environmental interference: the presence of strong electromagnetic interference around, affecting the normal operation of the sensor; working environment temperature is too high or too low, beyond the normal use of the sensor range.
l Solution
Replacement of the sensor: If the sensor is determined to be damaged, it should be replaced in a timely manner with the same type, the same specifications of the pressure sensor, and calibration.
Check the wiring: re-check and tighten the wiring, clean up the oxides at the wiring to ensure that the wiring is good; replace the damaged cables.
Reinstallation: Reinstall the sensor according to the correct installation method and requirements to ensure accurate installation position and good sealing.
Anti-interference processing: add shielded wire for the sensor to reduce electromagnetic interference; improve the working environment, control the temperature within the permissible range of the sensor.
2、Displacement sensor failure
l Failure phenomenon
Displacement display error: the displayed displacement value does not match the actual displacement, there is a large error; displacement display is not continuous, there is a jump phenomenon.
Inaccurate displacement control: in the process of pressing and loading, it is impossible to accurately control the displacement amount of pressing and loading, resulting in inconsistent depth of product pressing and loading.
l Failure causes
Sensor precision degradation: Long-term use or frequent mechanical movement, resulting in sensor precision degradation.
Installation error: the displacement sensor is installed with bad coaxiality with the moving parts, or the installation is not firm, loosening and shifting in the process of movement.
Signal transmission problems: signal transmission line damage, poor contact, or electromagnetic interference, affecting the accurate transmission of displacement signals.
Mechanical failure: the mechanical transmission parts associated with the displacement sensor (such as screws, guide rails, etc.) are worn, jammed and other problems, affecting the displacement measurement.
l Solution
Calibrate or replace the sensor: Calibrate the displacement sensor, and replace it with a new one if the accuracy cannot be restored.
Adjust the installation position: Re-adjust the installation position of the displacement sensor to ensure that it has good coaxiality with the moving parts and is firmly fixed.
Check signal transmission: check whether the signal transmission line is normal, replace the damaged cable; take shielding measures to reduce electromagnetic interference.
Inspection and repair of mechanical parts: check and repair the relevant mechanical transmission components, replace worn parts to ensure smooth mechanical movement.
3、Temperature sensor failure
l Failure phenomenon
Temperature display abnormality: the displayed temperature value is inaccurate, and the actual temperature deviation is large; the temperature display is a fixed value, not with the actual temperature changes.
Temperature protection failure: when the equipment temperature is too high, the temperature sensor fails to send a signal to trigger the protection mechanism.
l Failure causes
Aging of the sensor: Long-term use of the temperature sensor performance degradation, measurement accuracy is reduced.
Improper installation: the temperature sensor installation location is unreasonable, can not accurately measure the temperature of the key parts; installation and the measured object poor contact, affecting the temperature transfer.
Environmental factors: dust, oil and other pollutants in the working environment cover the surface of the sensor, affecting the temperature measurement; drastic changes in the ambient temperature, beyond the response range of the sensor.
l Solution
Replacement of the sensor: If the temperature sensor is aging badly and cannot measure the temperature accurately, it should be replaced with a new sensor in time.
Adjust the installation position: install the temperature sensor in a position that can accurately reflect the temperature of the critical parts, and ensure that it is in full contact with the object to be measured.
Clean the sensor: regularly clean the temperature sensor surface of dust, oil and other pollutants to ensure its normal operation. At the same time, improve the working environment to reduce the impact of environmental factors on the sensor.
4, proximity sensor failure
l Failure phenomenon
Detection failure: the proximity sensor can not detect the proximity of the target object, or in the target object is not close to the wrong trigger signal.
Detection distance instability: the actual detection distance is inconsistent with the nominal detection distance of the sensor, and fluctuations.
l Failure causes
Sensor sensitivity problem: the sensitivity of the sensor changes, too high or too low will affect the detection effect.
Improper installation position: the installation position of the proximity sensor does not meet the requirements, such as installation height, angle is not appropriate, resulting in limited detection range.
External interference: the presence of metal objects around, strong magnetic fields and other sources of interference, affecting the normal detection of proximity sensors.
l Solution
Adjust the sensitivity: through the sensor on the adjustment knob or programming, adjust the sensitivity of the sensor, so that it can achieve excellent detection results.
Re-installation: According to the installation requirements of the sensor, re-adjust the installation position and angle to ensure that the detection range meets the requirements.
Elimination of interference: Remove metal objects and strong magnetic interference sources close to the sensor, or use shielding measures to reduce interference.
※ If you still can't solve the problem by the above ways and means, please contact the technical specialist of Xinhui Mechanical and Electrical Equipment Co.
