1. What is the difference between low-inertia and high-inertia Tamagawa servo motors?
A: Low inertia and high inertia refer to the moment of inertia of a servo motor. A servo motor with high inertia has a strong load-carrying capacity, and vice versa. Similarly, a servo motor with low inertia has strong responsiveness, and a servo motor with high inertia has poor responsiveness.
2. What are the different types of Tamagawa servo control methods?
A: There are three control methods: position control, speed control, and torque control.
3. What is the difference between position control and speed control in Tamagawa servo control?
A: In Tamagawa's servo control system, position control refers to the system sending high-speed pulses to control the position, speed, and direction of the servo motor. The maximum resolution per revolution for position control motors is 131072 (17-bit encoder). If the encoder has 2500 lines, then the highest bit is 2500 * 4 = 10000.
Speed control is achieved by using voltage-simulated speed commands (-10V~+10V DC) to provide high-precision and smooth control over the speed and direction of the servo motor.
4. Why does the servo motor vibrate abnormally when it does not receive command pulses from the system?
A: After the customer installed and connected the servo motor, everything worked normally upon power-on, with no alarms. However, the motor exhibited abnormal vibrations, sometimes even accompanied by a loud screeching sound, after the servo was turned on. When the servo is on, it outputs a locking force to stop the servo motor in its current position. If the motor's power cables (U, V, W) are incorrectly wired, loosely connected, or the initial gain is too high, this locking force will cause the servo motor to vibrate.
5. Where can I download the Tamagawa server data?
A: The Tamagawa server data can be downloaded from the Aierte official website. Search "Aierte" on Baidu, website: http://www.contmp.com, and then go to the download center for Tamagawa.
6. What are the uses of the A-phase, B-phase, and Z-phase pulses fed back by the encoder on the Tamagawa servo drive?
A: The Z-phase pulse of the Tamagawa servo encoder is a special pulse signal; it only emits one pulse per revolution of the servo motor, and is generally used for servo origin zeroing. When the servo is used for speed or torque control, setting the number of A and B phase pulses can determine the position and speed of the servo motor.
7. What are the commonly used models and series of Tamagawa servo drives currently?
A: TAD8810: Drive motor power range 3W~100W.
TAD8811: Drive motor power range 30W~750W.
8. What is the name of the Tamagawa driver debugging software?
A: Tamagawa's debugging software is called Motion Adjuster, it's provided free of charge, and the latest version is 1.5.
9. Why does the motor vibrate and the lead screw vibrate when the lead screw stops?
A: When the lead screw vibrates at low speed or high speed (3000rpm) and stops, it is generally caused by the gain of the motor servo position loop and speed loop. It is recommended to adjust the load inertia values of 51, 52, 53, and 59. If the motor still has high-frequency vibration, adjust the low-pass filter to reduce the vibration.
10. Why is the system signal correct even though the motor direction is exactly opposite?
A: Modify parameter 72 to set the motor rotation direction.
11. What are the commonly used setting parameters for Tamagawa servo drives?
A: 1) 31#, control mode
2) 74#, position command selection
3) 120#, pulse mode
4) 121#, electronic gear molecule
Reduce 51, 52, and 53 (if the motor noise is high at the beginning).
12. How do Tamagawa servo drives form an absolute position control system?
A: To implement an absolute position control system for Tamagawa servo drives, the motor must use 17-bit or 23-bit absolute positioning; 2500-line or 17-bit incremental positioning is not acceptable. The servo drive must also be connected to a battery; Toshiba ER6V is recommended, but any 3.6V battery with a capacity of 1000mA or higher will suffice. For the TAD8811 driver, parameter 140 must be changed to 1. The absolute position control system encoder detects both the motor's position within one revolution and memorizes the number of revolutions. Regardless of whether the servo drive power is ON or OFF, the absolute position control system can detect the current position of the servo motor.
13. What are the different series of Tamagawa servo motors, and what are the differences between them?
A: Tamagawa servo motors include the TBL-i I, TBL-i II, and TBL-i III series.
TBL-i I refers to Tamagawa's early products, with encoder line counts mainly of 2000, 2048, and 2500 lines.
The TBL-i II is a technological upgrade of the TBL-i I, with a smaller size and an encoder line count of 2500, 17-bit absolute value.
The TBL-i III motor body has been redesigned with 10 poles and a 23-bit absolute encoder.
14. How are the current loop, speed loop, and position loop defined on the driver?
A: A current loop is a control loop that uses a current signal as the feedback signal.
The speed loop is a control element that uses the speed signal as the feedback signal.
The position loop is a control loop that uses the position signal as the feedback signal.
The current loop is the inner loop, which controls the mechanical characteristics of the system in a servo system. Its feedback element is generally a current transformer. The speed loop is outside the current loop and mainly controls the rotational speed. Its feedback element is generally an encoder. The position loop is outside the speed loop and mainly controls the position. Its feedback element is generally an encoder, linear encoder, rotary transformer, etc.
