PZT Piezoelectric Cylinders/Tubes
Yuhai company develop
and produce of various tube/cylinder sizes, bearing variety of electrode and
metallisation configurations. The tubes is fabricated from various published
and additional custom in-house Piezoelectric Material formulations for
applications such as high power, sensitivity, stability needs.
Features
aApplications include
Tubes
Height:
1-100mm
OD:
6-180mm
ID:
5-150mm
Wall: 0.5-15mm
Piezo Tube,Piezoelectric Tube,Piezo Electric Tube,Piezo Ceramic Tubes Zibo Yuhai Electronic Ceramic Co., Ltd. , https://www.yhpiezo.com
Servo driver important parameters setting method and skills - Database & Sql Blog Articles
In recent years, with the rapid development of the market and the continuous advancement of domestic power electronics technology, microelectronics, computer science, and control theory, CNC systems, AC servo drives, and motors have made significant progress. In some application areas, they have successfully broken the foreign monopoly. Having been engaged in numerical control technology for many years, I have used several digital servos from Japanese brands like Yaskawa, Matsushita, and Sanyo. However, due to the excellent cost-performance ratio of domestic servos, I have started using AC servo drives and motors produced by Chinese CNC companies. Based on my experience, I have compiled some practical and easy-to-apply tips.
1. **KNDSD100 Basic Performance**
1.1 **Basic Functions**
The KNDSD100 utilizes advanced digital signal processors (DSPs) such as TM320 (S240), large-scale programmable gate arrays (FPGAs), and Mitsubishi's new generation intelligent power modules (IPMs). It offers high integration, compact size, and robust protection features, including overcurrent, overload, overvoltage, undervoltage, encoder failure, and position tolerance. Compared to stepping motors, AC servo motors avoid step-out issues. They feature built-in encoders that provide feedback to the drive, forming a semi-closed-loop system with an open-loop controller. With a speed ratio of 1:5000, the torque remains constant across all speeds, ensuring stable performance and fast response. Full digital control allows users to adjust parameters for optimal operation. The price is only 2,000–3,000 yuan higher than stepping motors.
1.2 **Parameter Adjustment**
The SD100 provides 60 user parameters, 32 alarm parameters, and 22 monitoring options. Users can fine-tune settings based on site conditions for better control. Key parameters include:
- **Parameter 0**: Password, default value 315.
- **Parameter 1**: Model code, matching different power levels.
- **Parameter 4**: Control mode selection (position, speed, trial, JOG, encoder zero, open loop, torque).
- **Parameter 5**: Speed proportional gain, factory value 150.
- **Parameter 6**: Speed integral time constant, factory value 20.
- **Parameters 40 and 41**: Acceleration/deceleration time constants.
- **Parameter 9**: Position proportional gain, factory not set to 40.
2. **KNDSD100 Parameter Setting Tips**
When paired with the Kanedi CNC system, only the parameters in Table 1 need adjustment. The electronic gear ratio should be set to 1:1. For example, if the X-axis screw pitch is 4mm and the Z-axis is 6mm with a 1:2 reduction, the gear ratios are calculated accordingly. This ensures accurate pulse frequency division and proper motor control.
3. **KNDSD100 Parameter Optimization Techniques**
After initial setup, optimize the drive’s gain parameters. If the motor makes unusual noise, check installation or use parameters 7 and 8 (torque filter and speed detection low-pass filter) to suppress resonance. Adjust these values gradually until the noise disappears. If machining quality is poor, increase parameters 5 and 9 (speed and position gains) carefully to improve accuracy without causing vibration.
4. **KNDSD100 Fault Handling Techniques**
When an alarm occurs, the SERVOPACK disables the motor. Check the alarm number and consult the manual for troubleshooting. If no alarms are present, the issue might be with the control signal or host computer. Swap axes or modify model codes temporarily to identify faulty components. Ensure correct phase connections (U, V, W) to avoid operational issues.
5. **Other Servo Motor Processing Skills**
- **Motor Turbulence**: Unstable speed signals may result from encoder damage or poor connections.
- **Crawling**: Often occurs at low speeds due to poor lubrication or improper gain settings.
- **Vibration**: High-speed vibration may indicate speed loop problems.
- **Torque Reduction**: May occur due to overheating or mechanical wear.
- **Position Error**: Exceeding the tolerance range triggers an alarm.
- **No Rotation**: Check enable signals, pulse output, and mechanical connections.
6. **Conclusion**
Correct usage of CNC servo drives requires both proper parameter settings and adaptability to field conditions. Users must understand parameter functions and apply them practically to achieve optimal performance. With experience and careful tuning, servo systems can deliver reliable and efficient operation.