How to attach servo motor?
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How to attach servo motor?

Views: 0     Author: Site Editor     Publish Time: 2021-07-19      Origin: Site


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This is an embarrassingly simple question, but... how do you actually connect the part to the server? Obviously, this situation is easy to implement because it has mounting points, but the actual rotating part of the servo system is much more difficult.

The holes on the attached fixtures are too small for any type of screw, and glue is not an ideal solution (the screw cannot be inserted into the servo/removal part). 3D printing is almost impossible to achieve correct keying, and I don't know of any tool that can cut this type of spline (even then the screw hole will be blocked by the part). How to connect the servo system to the part?

This passage is going to talk about the followings of servo motor:

(1)   How does the servo motor work?

(2)   What is inside the servo motor?

(3)   Servo motor applications


(1) How does the servo motor work?

How to attach servo motor? You can try to solve these problems in this way.

The standard amateur servo system usually consists of a small motor, potentiometer, control electronics and gearbox. The position of the output shaft is continuously measured by the internal potentiometer and compared with the target position set by the controller.

Based on the error, the control electronics will adjust the actual position of the output shaft to match the target position. This is the so-called closed loop control system. The gearbox reduces the speed of the electric motor, thereby increasing the torque on the output shaft. The maximum speed of the output shaft is usually about 60 RPM.


servo motor

(2) What is inside the servo motor?

To fully understand how the servo system works, you need to take a closer look. There is a very simple setup: a small DC motor, potentiometer and a control circuit. The motor is fixed on the control wheel by gears. As the motor rotates, the resistance of the potentiometer changes, so the control circuit can accurately adjust the amount and direction of movement.

When the shaft of the motor is in the desired position, the power supply to the motor is stopped. If not, turn the motor in the proper direction. The desired position is sent through the signal line by electrical pulses. The speed of the motor is proportional to the difference between the actual position and the desired position. Therefore, if the motor is near the desired position, it will spin slowly, otherwise it will spin quickly. This is called proportional control. This means that the motor will only do its best according to the tasks that need to be completed. This is a very efficient little guy.


(3) Servo motor applications

Servo systems are used in radio-controlled aircraft to locate control surfaces, such as elevators, rudders, robot walking or operating grippers. The servo motor is small in size, has a built-in control circuit, and has good power suitable for its size.

In food service and medicine, these tools are designed to be used in more demanding environments because they are repeatedly cleaned under high pressure and high temperature to maintain strict hygiene standards, so the possibility of corrosion is high. Servos is also used in online manufacturing, in this case, high repeatability and precise work is required.

Of course, you don't have to know how the servo system works to use it, but as with most electronic devices, the more you understand, the more opportunities you have to open doors and project capabilities for expanding projects. Whether you are a hobbyist of construction robots, an engineer designing industrial systems, or just constant curiosity, where will servo motors take you?

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