One year warranty of UFC760BE41 3BHE004573R0041 ABB interface board

Description

Treatment of six common faults in BB robot servo motor repair
1. When motor error counter overflow fault occurs during high-speed rotation, how to deal with UFC760BE41?
Motor error counter overflow fault occurs when rotating at high speed.
Countermeasure 1: Check whether the wiring of motor power cable and encoder cable is correct and whether the cable is damaged.
The motor error counter overflow fault occurs when a long command pulse is input.
Countermeasure 2: If the gain setting is too large, manually adjust the gain from the beginning or use the active gain adjustment function; Extend acceleration and deceleration time; If the load is too heavy, it is necessary to select a motor with larger capacity from scratch or reduce the load, and install a transmission organization such as a reducer to increase the load.
Motor error counter overflow fault occurs during operation.
Countermeasures: Increase the set value of error counter overflow level; Slow down the rotation speed; Extend acceleration and deceleration time; If the load is too heavy, it is necessary to select a motor with larger capacity from scratch or reduce the load, and install a transmission organization such as a reducer to increase the load capacity.

2. If it does not work when there is pulse output, how to deal with it?
Monitor the current value of the pulse output of the controller and whether the pulse output light flashes, and acknowledge that the command pulse has been fulfilled and the pulse has been output normally;
Check whether the control cable, power cable and encoder cable from the controller to the driver are wrongly wired, damaged or in poor contact;
Check whether the brake of the servo motor with brake has been turned over;
Supervise whether the panel of the servo driver acknowledges whether the pulse command is input;
Run operation command is normal;
The azimuth control form must be selected;
Whether the input pulse type and command pulse set by the servo driver are the same;
Make sure that the drive stop signal at the forward rotating side, the drive stop signal at the rotating side and the error counter reset signal are not input, disconnect the load and operate normally without load. Check the mechanical system.

3. How to deal with overload without load alarm?
If the servo Run signal is connected and no pulse is sent:
Check the power cable wiring of the servo motor to see if there is poor contact or cable damage; If it is a servo motor with brake, the brake must be turned over; Whether the speed loop gain is set too large; Whether the integral time constant of the speed loop is set too small.
If the servo only occurs during operation:
Whether the gain of azimuth loop is set too large; Whether the amplitude of positioning completion is set too small; Check that there is no locked rotor on the servo motor shaft, and adjust the machine from the beginning.
4. How to deal with abnormal sound or vibration during operation?
Servo wiring:
Whether the power cable, encoder cable, control cable and cable are damaged; Check whether there are interference sources near the control line and whether they are parallel or too close to the nearby high current power cables; Check whether the potential of the grounding terminal changes suddenly to ensure excellent grounding.
Servo parameters:
If the servo gain is set too large, it is recommended to manually or actively adjust the servo parameters from the beginning; Acknowledge the setting of the time constant of the speed response filter. The initial value is 0, and you can test to increase the setting value; The electronic gear ratio is set too large, so it is recommended to restore to the factory setting; Resonance of servo system and mechanical system, test and adjust the frequency and amplitude of notch filter.
Mechanical system:
The coupling connecting the motor shaft and the equipment system deviates, and the mounting screws are not tightened; Poor engagement of pulleys or gears will also cause load torque changes. Test no-load operation. If it is normal during no-load operation, check whether the combination part of the mechanical system is abnormal; Recognize whether the load inertia, torque and speed are too large, and test the no-load operation. If the no-load operation is normal, reduce the load or replace the driver and motor with larger capacity.
5. How to deal with inaccurate azimuth control and positioning during ABB robot servo motor repair?
First, acknowledge whether the current value of the pulse actually announced by the controller is the same as expected. If not, check and correct the program;
Supervise whether the number of pulse commands received by the servo driver is the same as that announced by the controller. If not, check the control cable; Check whether the setting of servo command pulse form is the same as that of the controller, such as CW/CCW or pulse+direction;
If the servo gain setting is too large, test to adjust the servo gain manually or actively from the beginning; When the servo motor is reciprocating, it is easy to generate accumulated errors. It is proposed to set a mechanical origin signal under the conditions allowed by the process, and conduct the origin search operation before the error exceeds the allowable scale; The accuracy of the mechanical system itself is not high or the transmission organization is abnormal (for example, the coupling between the servo motor and the equipment system is offset).
6. The servo motor UFC760BE41 of ABB robot was repaired, and the azimuth control operation reported overspeed fault. How to deal with it?
Once the servo run signal is connected, it will happen: check whether the wiring of the servo motor power cable and encoder cable is correct and whether there is damage.
After the pulse command is input, it occurs at high speed: the pulse frequency output by the controller is too high, and the correction program adjusts the frequency of the pulse output; The electronic gear ratio is set too large; The servo gain setting is too large. Test to adjust the servo gain UFC760BE41 manually or actively from the beginning

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