Common Mitsubishi Servo Driver Alarm Codes and Solutions in vertical Machining Centers

Vertical Machining Centers Mitsubishi servo drives may stop working due to various reasons such as improper operation or equipment failure during daily use. At this time, you should confirm the cause of the failure according to the Mitsubishi servo drive alarm code, and then solve it. Now Silp will analyze several common Mitsubishi servo drive alarm codes and solutions.

1. Mitsubishi servo drive alarm code AL31.1

　　Fault analysis: It is the motor overspeed alarm.

　　 Reason analysis: 1. The input command pulse frequency is too high;

2. Too small acceleration and deceleration time leads to excessive overshoot;

3. The Mitsubishi servo system is unstable;

4. The electronic gear ratio is too large;

5. Mitsubishi servo encoder is malfunctioning;

　　 Corresponding solutions: 1. Set the correct pulse frequency;

2. Increase the time constant of addition and subtraction;

3. Reset the gain;

4. Set the correct electronic gear ratio;

5. Replace Mitsubishi servo encoder or Mitsubishi servo motor;

2. Mitsubishi servo drive alarm code ALE6.1

　　Fault analysis: Mitsubishi servo motor stopped urgently

　　Cause analysis: The line between Mitsubishi servo drive EMG and SG is disconnected

　　Corresponding solution: just short the EMG

3. Mitsubishi servo drive alarm code AL52

　　Fault analysis: The stuck pulse in the deviation counter exceeds the resolution capability of the Mitsubishi servo encoder multiplied by 10.

　　 Reason analysis: 1. The setting of acceleration and deceleration time constant is unreasonable;

2. The torque limit value is too small;

3. Due to the drop of the power supply voltage, the motor torque is insufficient and the servo motor cannot be started;

4. Position loop gain 1 is too small;

5. The servo motor shaft rotates due to external force;

6. Mechanical failure;

7. The encoder is faulty.

　　Corresponding solutions: 1. Set the correct acceleration and deceleration time constant (refer to the Mitsubishi Servo Motor User Manual);

2. Increase the torque limit value;

3. Replace the Mitsubishi servo motor with higher power;

4. Adjust the set value to the range where the Mitsubishi servo system can operate normally;

5. Increase the torque limit value, reduce the load or choose a Mitsubishi servo motor with a larger output

6. Install the limit switch after checking the operating mode

7. Replace Mitsubishi servo encoder or Mitsubishi servo motor