How To Adjust The Speed Of The Servo So That It Is Stable And Teach You How To Make The Robot Move Smoothly Without Shaking

Are you tinkering with theservo, trying to make your gizmo move more smoothly, or are you having a headache because the joints of your robot are not flexible enough? Anyone who plays withservos knows that it is not difficult to make it turn. The difficult thing is to make it turn at the speed and rhythm we want. This "servospeed adjustment" method is actually more demanding than you think. If you don't do it, not only will the movement be stiff, but the servo may also be burned. Today we will talk about how to figure this out so that your works can move steadily and smoothly.

What exactly isthe servo adjusting speed ?

Many people think that speed adjustment is simply a matter of changing a number to make the servo rotate faster or slower. In fact, it is not that simple. The inside of the steering gear is a closed-loop control system. The speed we are talking about is essentially changing the time it takes to run from the current angle to the target angle. This involves providing pulse signals of different widths to the internal motor of the steering gear to control its rotation pace. If you directly give a mutation signal, it will be easily thrown away like a convulsion. Not only will it make a lot of noise, but it will also cause damage to the steering gear. What really needs to be adjusted is to make this change process smooth and controllable.

Why does changing the speed directly cause severe shaking?

You must have encountered this situation. You want the servo to turn slower, but it jams one after another, as if it is doing a mechanical dance. This is usually because the signal update frequency you give does not match the response speed of the servo itself. Imagine that you ask a person to walk slowly, but you only give him a command once per second. He will definitely stop. The same goes for the servo. You need to use a program, such as using a delay or timer, to break down the angle change into countless small steps, and give each small step a pulse, so that the servo can move smoothly, as smoothly as silk.

How to program to achieve uniform rotation effect

If you want the servo to accurately turn from 0 degrees to 90 degrees at a constant speed, the simplest and most effective method is to travel in sections. For example, if you expect it to complete a 90-degree rotation in 3 seconds, then through precise calculations, you can add an extremely small angle to it every 10 milliseconds, such as 0.3 degrees. This angle value is then continuously updated in the loop structure and sent out through.write(). ️The core skill is:cleverly split the big angle into small steps, and use fixed time intervals to execute them one after another. In this way, the servo will feel as if someone is pushing it forward at a constant speed from behind, rather than pushing it suddenly and hard. The final effect will be immediate.

In actual operation, this segmented approach can make the steering gear rotate more smoothly. By carefully calculating the angle increment and time interval, it is ensured that the steering gear rotates at exactly the right angle each time. The process of continuously updating the angle value and sending it out in the loop also ensures that the servo can continue to rotate stably at the set speed. This method of splitting a large angle into small steps and executing them at fixed time intervals makes full use of the working principle of the steering gear to achieve the best rotation effect of the steering gear. It can play an important role in both simple experimental scenarios and more complex application scenarios, and provides a reliable way to achieve precise steering gear control.

How to draw acceleration and deceleration curves

A constant speed is enough, but if you want to be more advanced, such as having a buffer when the robotic arm starts and stops, you have to use acceleration and deceleration curves. This may sound mysterious, but it’s not difficult to do. You can use a quadratic function or the simpler first half of a sine curve to plan the velocity. For example, in the starting stage, let the angle increment slowly increase from 0, just like a car starting; when approaching the target, let the angle increment slowly decrease and stop smoothly. Precalculate these incremental data in the code and save them into an array, and then call them sequentially in the loop to achieve a very smooth and high-level motion trajectory.

What kind of steering gear is more suitable for speed regulation?

If you want to play tricks with speed regulation, the hardware foundation must be excellent. Ordinary analog servos have a delay in response to signal changes, and are often unable to perform complex speed regulation operations. The digital servo is different. Its processing speed is faster and its response is more sensitive. It has naturally become the first choice for speed control players.

In addition, serial bus servos with feedback (such as the LX-16A) are more convenient. They usually integrate more intelligent control algorithms. You only need to send an instruction "turn to 90 degrees within 3 seconds", and it will properly handle the acceleration and deceleration process by itself, saving worry and effort. If your project is more complex, you can consider using this kind of steering gear directly.

Common pitfalls and solutions when doing projects

During the operation process, the most common pitfall for novices is to insert too much content into the loop. This will cause the interval of sending signals to the servo to become unstable. For example, if you use thedelay()function, once the program is paused, the servo will freeze. To solve this problem, the solution is to use the()function for timing and perform tasks in a non-blocking manner to ensure that the update of the servo signal will not be interfered by other codes.

Another common pitfall is insufficient power supply. When performing speed regulation operations, the servo needs to be started frequently. At this time, the current demand is large. Once the voltage drops, the control of the servo will become inaccurate. If the situation is serious, it may even cause the main control board to restart. Therefore, preparing a reliable power supply for the servo is a prerequisite for ensuring the speed adjustment effect.

After talking so much, in the final analysis,steering gear speed adjustmentis to transform blunt instructions into warm and rhythmic control. Next time you are debugging, you might as well think more about what kind of "pace" and "rhythm" your servo needs. In the small projects you are currently working on, what is the most troublesome speed adjustment problem for you? Welcome to chat in the comment area. Maybe I can give you some advice. Don’t forget to give it a like and share it with other friends who play with hardware! If you want to know more professional steering gear selection and solutions, you can search the official website of the relevant company, where you will find more detailed product information.