According to the characteristics of FANUC FS16/18 series servo system, the following common methods can be used to repair it:
1. Judgment of output current. When the servo doesnt work, it can be judged whether the drive is damaged or not by measuring the output current of the driver. Generally, if the output current is 0A or no voltage appears, it means that the driver is damaged. Generally, the output current is 0, indicating that the driver is damaged, and it must be replaced.
2. Troubleshooting of input/output signals of servo drive. In the process of Fanuch Fs16/18servo system maintenance, if there is a problem with the input and output signals of the servo motor, it can be judged according to the following three points: (1) the normal 100MW output signal of the servo motor; (2) the normal 24V output signal of the servo motor; (3) the servo power input side.
3. The active current is too small. In the process of maintenance, if it is found that the current of the servo motor is too small and the motor can hardly rotate, the motor itself may be damaged, and the motor must be replaced in this case.
4. The output current of the driver decreases considerably. When the servo drive is not operating normally, the output current of the driver can be examined. If the output current of the driver decreases significantly compared with the rated current of the driver and the motor has no reset pulse, the driver is damaged and must be replaced.
5. The servo motor cannot start. When the servo motor cannot start, it may be caused by the fuse damage, the current limit is too small, or the voltage of the servo power supply is too low or too high. It can be judged that if the fuse is damaged, it needs to be replaced, and if the current limit is too small and the voltage range is beyond the allowable range of the motor, it needs to be adjusted.
6. Improper parameter settings. Improper parameter settings are the cause of many servo motor faults. Therefore, before debugging the servo motor, we must first read the parameter values, and then confirm whether the parameters are set according to the requirements. There are many factors to consider when setting parameters, such as motor type, load inertia, motor rotation speed and control method, and in some cases speed limit parameters must be set.
7. Bad communication. Communication problems can cause servo drive faults. Therefore, it is necessary to check whether the communication line is connected normally. If the connection between the host and the driver is not correct, it will lead to communication errors and servo drive fault.
8. Auto-tuning faults. If a fault occurs during the auto-tuning process of the servo system, such as interrupted servo or caused by the excessive load torque of the system, the main reason is that the load inertia of the system is low or the rated current of the motor is too large. Too small load inertia and too large rated current of the motor will cause failure of the auto-tuning process.
In conclusion, in the maintenance of Fanuch Fs16/18 servo system, the output current of the driver should be measured first, and then the fault of the servo motor can be judged according to the input and output signals and parameters. In addition, it is necessary to check whether the communication and connection between the servo drive and the host is normal, as well as whether the load inertia and current parameters of the motor are properly set. In addition, it is necessary to pay attention to the bad communication caused by the problem of auto-tuning.
