Setting the key parameters of the servo drive is a crucial step in ensuring the efficient and precise operation of the servo system, involving multiple aspects such as position control, speed control, and torque control. Below are some methods and techniques for setting the main parameters:
1. Position Proportional Gain (Kp)
●Function:
It determines the system's response speed and accuracy to position errors.
●Setup Tips:
Gradually increase the value from small to large until the system runs stably under no load or light load, while avoiding oscillations.
●Detection method:
Observe the response of the servo motor. If oscillation occurs, reduce the gain; if the response is slow, increase it appropriately.
2. Velocity Proportional Gain (Kv)
●Function:
Control the response speed of the speed loop.
●Setting Tips: After ensuring that the position gain is set reasonably, adjust the speed gain so that it can respond quickly to changes in speed commands without causing excessive speed fluctuations.
●Note: Too high a speed gain may cause system instability, while too low a speed gain will result in slow response.
3. Velocity Integral Time (Ki)
●Function: Eliminate speed errors and improve system stability.
●Setting tips: While avoiding speed drift, minimize overshoot and oscillation caused by integral action, and gradually increase until the system response is stable.
● Balance point: Find the optimal balance between gain and stability.
4. Position Feedforward Gain (Kf)
●Function: Improves the system's response speed to rapidly changing instructions and reduces following errors.
●Setting tips: Adjust according to load inertia, speed requirements and system dynamics. Too high a setting may cause overshoot, while too low a setting will result in a slow response.
● Testing: Observe and adjust through actual testing to achieve optimal performance.
5. Current Loop Gains (Kt, Ki)
●Function: Controls torque output, directly affecting the motor's response speed and accuracy.
●Settings: Usually preset by the manufacturer, but may need to be adjusted in special applications to accommodate high dynamic response requirements or heavy loads.
6. Other techniques
●Step-by-step adjustment: Adjust parameters one by one and observe the system response to avoid making it difficult to locate the problem by changing multiple parameters at the same time.
●Load simulation: Before actual operation, use load simulation or perform preliminary debugging under no load, gradually increase the load, observe and adjust the parameters.
●Use software tools: Utilize the debugging software included with the servo drive or third-party tools to perform parameter optimization and fault diagnosis.
●Record and compare: Record the parameters and system response after each adjustment for easy backtracking and comparison to find the optimal settings.
●Safety First: Ensure safety measures are in place during the adjustment process to avoid accidental injury or equipment damage.
The specific setup methods and parameter names may vary for each servo drive. Please refer to the device's user manual or contact the manufacturer for detailed instructions.
