11 examples to teach you how to deal with servo motor jitter problems

华科星电气 · Published on 2018-11-23 15:16

11 examples to teach you how to deal with servo motor jitter problems [Copy link]

1. What is the reason why the servo motor cannot start and makes loud noise and vibration? Answer: 1. Disconnect the load. 2. Turn it by hand to confirm that it is flexible and has no abnormalities. 3. Carry out no-load start experiment. 4. Check the load condition. First check if there is a problem with the dynamic balance, which is the sound of the electric current. Next, check the motor bearings, and finally the servo drive parameters. In most cases, the bearings are loose or broken. 2. The AC servo motor will vibrate during operation. How to solve this problem?

Answer: 1. It means that the actual value of the remote control registration cannot be checked.

2. It means that the normal value cannot be transmitted.

3. It means that the status of the currently selected unit cannot be checked.

4. The current running status of the servo motor cannot be confirmed.

5. The position potentiometer of the servo motor is not within the adjustment range.

The jitter is not normal, it may be due to the guide rail is not smooth, or the power supply is insufficient. Adjust the power, adjust it to a lower point.

3. How to solve the problem of load vibration caused by the servo motor suddenly stopping at the positioning point?

Answer: You can try to use the acceleration and deceleration pulse output instructions. The vibration of the load caused by the sudden stop is the embodiment of the contradiction between the rotational inertia and the deceleration torque. It can be reduced but not completely eliminated. The most effective way is to gradually decelerate for a period of time before reaching the positioning point. This needs to be solved from two aspects. The fundamental, the performance of the servo and the on-site debugging; PLC pulse.

Fourth, when PLC sends pulses to control the servo motor, when no pulses are sent, the motor sometimes has a slight shake, what should I do?

Answer: 1. The servo parameters should be adjusted, mainly: inertia size, rigidity, 2. Some also need to adjust the position ratio, integral, differential

Five, when using the program to start the stepper motor, there will be a shake sound and it cannot start. Can the servo motor solve this problem?

Answer: It has little to do with the program. It should be caused by insufficient motor inertia. It is recommended to change to a larger stepper or servo. The servo can be overloaded.

sans-serif]Six, what is the reason for the servo motor to shake quickly?

Answer: 1. Servo wiring: a. Use standard power cable, encoder cable, control cable, and check whether the cable is damaged; b. Check whether there is any interference source near the control line, and whether it is parallel to or too close to the nearby high-current power cable; c. Check whether the ground terminal potential has changed, and ensure that the grounding is good.

2. Servo parameters: a. The servo gain setting is too large. It is recommended to readjust the servo parameters manually or automatically; b. Confirm the setting of the speed feedback filter time constant. The initial value is 0. You can try to increase the setting value; c. The electronic gear ratio is set too large. It is recommended to restore it to the factory setting. d. The servo system and the mechanical system resonate. Try to adjust the notch filter frequency and amplitude.

3. Mechanical system: a. The coupling connecting the motor shaft and the equipment system is offset, and the mounting screws are not tightened. b. Poor engagement of the pulley or gear will also cause load torque changes. Try to run it without load. If it is normal when running without load, check whether there is any abnormality in the joint part of the mechanical system. c. Confirm whether the load inertia, torque and speed are too large. Try to run it without load. If it is normal when running without load, reduce the load or replace the drive and motor with larger capacity.

Seven, the servo motor is beeping, and oscillating back and forth around a point, what is going on?

Answer: Try adjusting the speed loop and position loop gains back and forth. I encountered this situation because the speed loop gain was too low and the integral factor was also relatively low. Reduce the position gain on the driver. The position loop gain is currently in automatic mode, and recently I want to increase the position loop gain to improve the influence of the retained pulse. Then increase the speed loop gain and try, but it may be worse, change to a larger motor and try. How to adjust the servo gain using servo monitoring software? How to analyze the system response by looking at the curve? If the parameters are adjusted well, will there be an overtravel at the end of the servo fast positioning, and will there be a slight vibration at this time? The fourth position of parameter 2 is the mechanical resonance frequency setting. Try to increase it, and there should be some improvement, unless the selection is not suitable and the load's moment of inertia is much greater than the motor rotor's moment of inertia. Generally, oscillation is mostly caused by excessive integral action. When adjusting, the position loop proportional gain can be appropriately increased.

8. How to deal with the heating and shaking of AB servo motor?

Answer: The acceleration and deceleration of AB servo motors are all above 10,000, and the motor is hot (the other normal ones have basically no temperature). The motor is installed vertically and the descending distance is very short. When it stops, it jumps violently, like elasticity.

(1) The bearing should have radial clearance. (2) The vertically mounted servo motor should have a brake. If you accelerate or decelerate quickly, the motor brake may be heated. (3) Motor vibration may be a rigidity problem (4) The encoder position is offset from the zero point

9. How to deal with Panasonic servo motor vibration (motor vibration when the load is slightly larger)? Answer: 1. Is the inertia ratio set properly? The motor inertia may be too small. 2. Is the gain setting too high?

10. What are the possible reasons for Mitsubishi servo motor jitter? Answer: 1. The servo load is too large (the servo is too small) 2. The servo rigidity is not adjusted properly 3. The screw is not selected properly

11. What should I do if the Yaskawa 08A servo motor shakes? Answer: The Yaskawa servo motor is 08A. The machine tool will shake and sometimes scream during operation. I have tried adjusting the rigidity with F001. It was 6 when it left the factory. Now changing it to 5 or 4 does not work. The machine tool uses a new generation system. I have also changed the rigidity gain in the system but there is no major change.

First, make sure it is a servo problem. If it is, then the rigidity adjustment will generally work a little. If the effect is really not good, manually adjust the speed loop, Pn110.0=2; Pn103=x% (x is set according to the machine situation. If you don’t know, try 100 or 200); then increase the speed loop gain Pn100 (1-2000), or reduce the differential time PN101 (15-51200). If it still doesn’t work, then it is a problem with the upper system.

Answer: 1. Servo wiring: a. Use standard power cables, encoder cables, and control cables to check if the cables are damaged; b. Check if there are interference sources near the control line, and whether they are parallel to or too close to the nearby high-current power cables; c. Check if the grounding terminal potential has changed, and ensure that the grounding is good.

2. Servo parameters: a. The servo gain setting is too large. It is recommended to readjust the servo parameters manually or automatically; b. Confirm the setting of the speed feedback filter time constant. The initial value is 0. You can try to increase the setting value; c. The electronic gear ratio setting is too large. It is recommended to restore it to the factory setting; d. The resonance between the servo system and the mechanical system. Try to adjust the notch filter frequency and amplitude.

3. Mechanical system: a. The coupling connecting the motor shaft and the equipment system is offset, and the mounting screws are not tightened; b. Poor engagement of the pulley or gear will also cause load torque changes. Try running it without load. If it is normal when running without load, check whether there is any abnormality in the joint part of the mechanical system; c. Confirm whether the load inertia, torque and speed are too large, try running it without load. If it is normal when running without load, reduce the load or replace the drive and motor with a larger capacity.

7. Why does the servo motor make noises and oscillate back and forth around a point?

Answer: Try adjusting the speed loop and position loop gains back and forth. I encountered this situation because the speed loop gain was too low and the integral factor was also relatively low. Reduce the position gain on the driver. The position loop gain is currently in automatic mode, and recently I want to increase the position loop gain to improve the influence of the retained pulse. Then try increasing the speed loop gain, but it may be worse. Try changing to a larger motor. How to adjust the servo gain using servo monitoring software? How to analyze the system response by looking at the curve? If the parameters are adjusted well, will there be an overtravel at the end of the servo fast positioning, and will there be a slight vibration at this time? The fourth position of parameter 2 is the mechanical resonance frequency setting. Try to increase it as much as possible, and there should be some improvement, unless the selection is not suitable and the load's moment of inertia is much greater than the moment of inertia of the motor rotor. Generally, oscillation is mostly caused by excessive integral action. When adjusting, the position loop proportional gain can also be appropriately increased.

8. How to deal with the AB servo motor heating up and shaking?

Answer: The acceleration and deceleration of the AB servo motor are both above 10,000, and the motor is heating up (the other normal ones have basically no temperature). The motor is installed vertically and the descending distance is very short. When it stops, it jumps violently, as if it has elasticity.

(1) It should be that the bearing has radial clearance. (2) The vertically mounted servo motor should be equipped with a brake. If you accelerate or decelerate quickly, the motor brake may be heated. (3) Motor vibration may be caused by rigidity problems (4) The encoder position is offset from the zero point

IX. How to deal with Panasonic servo motor vibration (motor vibration when the load is slightly larger)? Answer: 1. Is the inertia ratio set properly? The motor inertia may be too small. 2. Is the gain setting too high?

10. What are the possible reasons for Mitsubishi servo motor jitter? Answer: 1. The servo load is too large (the servo is too small) 2. The servo rigidity is not adjusted properly 3. The screw is not selected properly

11. What should I do if the Yaskawa 08A servo motor shakes? Answer: The Yaskawa servo motor is 08A. The machine tool will shake and sometimes scream during operation. I have tried adjusting the rigidity with F001. It was 6 when it left the factory. Now changing it to 5 or 4 does not work. The machine tool uses a new generation system. I have also changed the rigidity gain in the system but there is no major change.

First, make sure it is a servo problem. If it is, then the rigidity adjustment will generally work a little. If the effect is really not good, manually adjust the speed loop, Pn110.0=2; Pn103=x% (x is set according to the machine conditions. If you don’t know, try 100 or 200); then increase the speed loop gain Pn100 (1-2000), or reduce the differential time PN101 (15-51200). If it still doesn’t work, then it is a problem with the upper system.