Servo motor refers to the engine that controls the operation of mechanical components in the servo system, and is a kind of auxiliary motor profile transmission device.
The servo motor can control the speed, and the position accuracy is very accurate, It can convert the voltage signal into torque and speed to control the drive control object. The rotor speed of the servo motor is controlled by the input signal, and can respond quickly, in the automatic control system, used as an actuator, and has the characteristics of small electromechanical time constant and high linearity, which can convert the received electrical signal into angular displacement or angular velocity output on the motor shaft.
Situation 1: The servo motor does not run when the pulse is output.
1. Monitor the current pulse output value of the controller, check whether the pulse output indicator flashes, confirm that the controller has executed the command pulse and output the pulse normally.
2. Check whether the control cable, power cable, and encoder cable between the controller and the driver are mismatched, damaged, or in poor contact.
3. Check if the servo motor brake with brake is turned on.
4. Monitor the servo drive panel to confirm whether the pulse command is entered.
5. Run the command normally.
6. For control mode, always select the position control mode.
7. Check whether the input pulse type set by the servo drive matches the command pulse type.
8. Make sure that the positive side drive inhibition, responsible drive inhibition signal, and deviation counter reset signal are not entered, and that the motor is running properly after the load is removed, and then check the mechanical system.
Situation 2: When the servo motor rotates at high speed, the motor deviation counter has an overrun error.
1. When the servo motor tells the rotation, the motor deviation counter will have an overrun error.
Solution: Check whether the motor power cable matches the encoder correctly and whether the cable is damaged.
2. When a long command pulse is entered, the per-click deviation counter will have an overrun error.
Solution: A． The gain setting is too large. Readjust the gain settings manually or use the Auto-Adjust Gain Settings feature.
B． Extend acceleration and deceleration times.
C． The load is too heavy. It is necessary to choose a motor with a larger capacity or reduce the load, and install a reducer or other driving mechanism to improve the load capacity.
3. The motor deviation counter has an overrun error during operation.
Solution: A． Increase the overrun level setpoint for the deviation counter.
B． Reduce the rotational speed.
C． Extend acceleration and deceleration times.
D． The load is too heavy. It is necessary to choose a motor with a larger capacity or reduce the load, and install a reducer or other driving mechanism to improve the load capacity.
Situation 3: The servo motor is overloaded when running at no load.
1. If this happens when the servo running signal is connected and there are no pulses:
Solution: A． Check whether the wiring of the power cord of the servo motor is not in poor contact or whether the cable is damaged.
B． For servo motors with brakes, be sure to turn on the brakes.
C． If the speed circuit gain is set too large.
D． The integration time constant of the velocity circuit is set too large.
2. If the change occurs during operation:
Solution: A. If the position circuit gain is set too large.
B. If the positioning completion amplitude is set too small.
C. Check that the servo motor shaft is not stalled, and readjust the mechanism system.
Situation 4: Abnormal noise or shaking occurs when the servo motor is running.
1. Servo wiring:
Solution: A. Use the knitting power cable, encoder cable, and control cable to inspect the cables for damage
B. Check whether there is an interference source near the control line, and whether the control line is parallel to or too close to the nearby high-current power line
C. Check whether the ground terminal position has changed to ensure that the grounding is good
2. Servo parameters:
Solution: A． The servo gain is set too large. It is recommended to readjust the servo parameters manually or automatically.
B． Confirm that the time of the velocity feedback filter is set to 0 as the initial value, and try to increase the set value.
C． The electronic gear ratio is set too large. It is recommended to restore the factory facility.
D． The servo system resonates with the mechanical system. Try adjusting the frequency and amplitude of the notch filter.
3. Mechanical System:
Solution: A. There is a deviation between the motor shaft and the coupling of the equipment system, and the mounting screws are not tightened.
B. Poor engagement of pulleys or gears may also cause changes in load torque. Try running with no load. If the system is running normally at no load, check whether there is any abnormality in each meshing part of the mechanical system.
C. Check whether the load inertia, torque, and speed are too large. Try running with no load. If the system is unloaded, lighten the load or replace the high-capacity drives and motors.
Situation 5: The position control and positioning of the servo motor are not accurate.
1. First of all, make sure that the current pulse values actually sent by the controller are all the same as expected. If not, check and correct the procedure.
2. Monitor whether the number of pulse instructions received by the servo drive is consistent with the number of pulse instructions received by the controller. If not, check the control cable.