What are the common control unit failures and solutions for series excitation motor motor stator press end plate machine?
The common control unit faults and solutions for series excitation motor motor stator press end plate machine are as follows:
1、Power failure
Failure phenomenon: the control unit can not start normally, or in the operation of the process of a sudden power failure, resulting in equipment stop working, the relevant indicator lights do not light or flashing abnormality
Solution:
Check the external power supply: confirm whether the power supply voltage input to the control unit is within the rated range, check whether the power supply plug, socket is in good contact, there is no loosening, oxidation and other phenomena, if any problem, repair or replace the plug, socket, to ensure that the power supply is normal.
Detect the internal power supply circuit: use a multimeter to check the power supply circuit inside the control unit to see if there are damaged components, such as blown fuses, capacitor leakage, diode short circuit, etc.. For damaged components, timely replacement of the same specifications of the components
Check the power supply filter: a faulty power supply filter may cause interference signals in the power supply to affect the normal operation of the control unit. Check whether the connection of the filter is firm, there is no damage, if necessary, replace the power filter .
2、Control chip failure
Failure phenomenon: the device has a variety of abnormal operating conditions, such as motor speed out of control, inaccurate pressure and position control of the pressure end plate, frequent errors during operation or crash, and can not be resolved through conventional parameter adjustment and other methods.
Solution:
Reset or restart: Try to perform a reset operation on the control unit or restart it after turning off the power of the equipment to see if normal operation can be resumed. If the fault still exists, further inspection is required.
Check the working conditions of the chip: make sure that the working voltage, clock signal, etc. of the control chip are normal. Use an oscilloscope and other instruments to detect the chip's power supply pins and clock pins to see if there is a stable voltage and normal clock pulse. If there is any abnormality, check the related power supply circuit and clock generator circuit .
Update or replace the chip: If it is determined that the control chip is damaged and its function cannot be restored through repair, the control chip needs to be replaced with a new one. When replacing the chip, pay attention to the chip model, package and other parameters must be identical to the original chip, and strictly in accordance with the welding process, to avoid new faults caused by poor welding .
3, communication failure
Failure phenomenon: the control unit and other equipment or modules can not be normal communication, such as with the host computer, sensors, drives, etc. between the data transmission interruption or error data, resulting in equipment can not be coordinated, alarm prompts, etc. 2.
Solution:
Check the communication line: check whether the communication cable is firmly connected, with or without damage, breakage, etc.. If there is any problem, replace the communication cable and make sure the connection is correct. At the same time, check whether the communication interface is loose, oxidized, etc., and if necessary, clean and tighten it 2.
Check the communication protocol and parameter settings: confirm whether the communication protocol between the control unit and other devices is consistent, and whether the communication parameters such as baud rate, data bits, stop bits, parity bits, etc. are set correctly. If there is any inconsistency, modify the corresponding parameter settings to make them match.
Detecting communication chips and circuits: Use professional tools to detect whether the communication chips and their peripheral circuits are working properly. If the communication chip is found to be damaged, replace it in time; for the resistors, capacitors and other components in the peripheral circuits, check whether there are faults such as false soldering, short-circuiting and open-circuiting, and repair or replace them accordingly.
4, relay failure
Failure phenomenon: the control unit in the relay can not be normal suction or release, resulting in the relevant circuit can not conduct or cut off, affecting the normal operation of the equipment. For example, the motor start, stop control failure, or press the end of the board machine some auxiliary equipment (such as cooling fans, lubrication pumps, etc.) can not work properly.
Solution:
Check the relay coil: use a multimeter to measure the resistance value of the relay coil to determine whether the coil is open or short-circuited. If the coil is damaged, replace the relay coil with the same specification or the whole relay.
Check the relay contacts: check whether the relay contacts have oxidization, ablation, sticking, etc., resulting in poor contact or failure to disconnect properly. If there is a problem, use fine sandpaper to gently sand the contacts to remove the oxidized layer, or replace the relay contacts. For severely ablated relays, it is recommended to directly replace the relay with a new one.
Check the relay driving circuit: A faulty driving circuit of the relay will also cause the relay to fail to work properly. Check whether the transistors, integrated circuits and other components in the driving circuit are damaged, if so, replace them in time, and check whether the relevant connection lines are normal .
5, sensor interface failure
Failure phenomenon: the control unit can not correctly receive or process the signals from the sensor, resulting in the equipment can not be accurately controlled and adjusted according to the actual working conditions. For example, pressure sensors, position sensors and other signal abnormalities, so that the pressure control and position control of the pressure end plate machine is inaccurate.
Solution:
Check the interface connection: make sure that the interface connection between the sensor and the control unit is firmly connected without looseness or false connection. Re-plug and unplug the sensor plug, check whether the pins inside the plug are bent or deformed, and repair or replace accordingly.
Check the interface circuit: use a multimeter to check whether the resistors, capacitors, diodes and other components in the sensor interface circuit are normal, and whether there are short circuits, open circuits and other faults. For damaged components, replace them, and check whether the solder joints of the interface circuit are firm, with or without false welding, desoldering and other problems, and if necessary, make up the welding process .
Test the sensor signal: In the sensor interface of the control unit, use an oscilloscope or multimeter and other tools to measure the sensor output signal to determine whether the signal is normal. If the signal is abnormal, check whether the sensor itself is damaged, if so, replace the sensor.
※ If you still can't solve the problem through the above ways and means, please contact the technical specialist of Xinhui Electromechanical Equipment Co.
