The principle of a servo system is quite straightforward:
1. The inverter acts as the servo actuator.
2. A servo is an automatic control system that regulates the position, orientation, and posture of an object to create an arbitrary control system for tracking a target.
3. The inverter executes commands such as starting, stopping, speed adjustment, and braking for the servo.
4. The servo detects the actual displacement of the motor and workpiece through an encoder. It then compares this with the target control value input by the upper computer. The difference between the target and actual values becomes the servo command.
5. For example:
- If the command pulse minus the feedback pulse is greater than zero, the system starts and accelerates.
- If the command pulse minus the feedback pulse is zero or positive, it decelerates and stops.
- If the command pulse equals the feedback pulse, it reverses direction.
6. The start and stop commands generated by the "command pulse - feedback pulse" process are precise. However, the actual position where the motor stops may not match the given location, making it difficult to control accurately.
7. Therefore, the servo system excels at issuing precise commands and detecting feedback but does not directly control the motor's movement precisely.
8. In contrast, a stepper motor allows for precise motor control, as each step is determined before movement.
9. If the "command pulse - feedback pulse" signals from the servo are used to directly control the stepping current of the motor, it could potentially achieve precise motion control.
What are the common methods of motion control?
1. There are three main types of motion control systems:
- Pulse-based stepper motor control.
- Host computer + PLC + encoder + speed-controlled motor.
- PLC + position switch + standard (speed-controlled) motor.
2. Different applications suit different methods:
- For tasks like embroidery, pulse-based step motion control is ideal.
- For operations like a universal milling machine’s table movement (forward, backward, up, down, left, right, rotation), a PLC + position switch + standard motor system works well.
- For robotics, a combination of PLC + position switch + standard motor or host computer + PLC + encoder + speed-controlled motor is suitable.
3. If your system only requires basic motion control, using a "PLC + position switch + standard (speed-controlled) motor" setup is efficient, flexible, easy to operate, maintain, and highly reliable.
Aluminum-cased Electric Projection Screen
4-definition image quality, high-definition resolution of natural field of view, equipped with HDR high dynamic range image resolution, improving image contrast, wider open angle, consistent and clear visibility of images seen from different positions, as if you are in person.
Aluminum-Cased Electric Projection Screen,Hd Aluminum Shell Electric Projection Screen,Home Motorized Projector Screen,Motorized Electric Hd Projection Screen
Jiangsu D-Bees Smart Home Co., Ltd. , https://www.cI-hometheater.com