Solve Servo Motor Vibrating (Shaking) or Moving When Booting ~ Arduino Geek

May be someone has experience the same thing to me when trying to 'program' servo motor with Arduino. The problems are, servo motor get vibrating/shaking after we gave the order to go to a certain angle, and the second issue, the servo motor drifts when the program runs the first time (booting). Maybe the problem is trivial to those who already an expert, but it may also be very useful for those who are frantically looking for a solution :)

Servo Motor Problem and Solution

Okay, maybe I wrote out a solution to the second problem first, the easy one :). Servo motor moves itself shortly after the program runs. After I troubleshoot, the root cause of this problem is function attach (); of servo.h library declaration. So for those of you who put this function block void setup (); try removed first, then re-upload the sketch. Problem solved :). Simple but bullseye :). You can declare this function shortly before telling the servo motor to a certain angle with the command (e.g) myservo.write (90);.

Second problem, the servo motor vibrating or shaking after we finished telling it towards a certain angle (after myservo.write(); command ). First, we must analysis the root cause. As we know, a servo motor only knows 'angle' parameter in its life cycle. Once it was given orders to go to a certain angle, it will forever be towards the corner even though it was in destination angle. This is why the servo motor will vibrates/shakes if it has been settled in the destination angle. Servo motor will continuously toward the angle, so the effect of servo motor will vibrate/shake.

Motor Servo Vibrating/Shaking Solutions

What's the solution? It turned out to easily technique. Just call function detach(); after you ordered toward a certain angle then servo motor will stop from vibrating/shaking. So if we ordered a servo motor to a certain angle we should write a complete code as follows:

#include <Servo.h>;

Servo Myservo;

void setup () {

}

void loop () {

Myservo.attach (9);

Myservo.write (90);

delay (1000);

Myservo.detach ();

delay (1000);

Myservo.attach (9);

Myservo.write (0);

delay (1000);

Myservo.detach ();
delay (1000);

}

With the sketch above, you will attach servo motors on pin 9, toward the corner 90⁰,stops shortly (1 second) to wait for the servo motor rotates to angle 90⁰ and detach it, so it won’t to vibrate/shake. Alternately, the servo motor will rotate to the angle 0⁰ in a few next scripts. In order to know the difference, please try to remove Myservo.detach (); command, and compare the results when there is same command.

This is end of my brief tutorial, may be useful for who is looking for, or at least to note myself so do not forget later.

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