Problems with Servo motor MG 996R Tower Pro

Projects Programming
1

I'm testing Servo Motor MG 996R Tower Pro and when i use a simple code he goes 180 º and starts to shake. I already try use a separate power suply to the Servo motor and the only difference it's that he goes a little more fast. I'm using a arduino uno. Moreover doens't matter wich angle i chose he always goes 180º and shake.

/* Sweep
 by BARRAGAN <http://barraganstudio.com>
 This example code is in the public domain.

 modified 8 Nov 2013
 by Scott Fitzgerald
 https://www.arduino.cc/en/Tutorial/LibraryExamples/Sweep
*/

#include <Servo.h>

Servo myservo;  // create servo object to control a servo
// twelve servo objects can be created on most boards

int pos = 0;    // variable to store the servo position

void setup() {
  myservo.attach(10);  // attaches the servo on pin 9 to the servo object
}

void loop() {
  for (pos = 0; pos <= 180; pos += 1) { // goes from 0 degrees to 180 degrees
    // in steps of 1 degree
    myservo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(15);                       // waits 15 ms for the servo to reach the position
  }
  for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees
    myservo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(15);                       // waits 15 ms for the servo to reach the position
  }
}
2

That power supply must be able to provide at least 3 Amperes, at 5 to 6V, for one MG996R. If not, the servo will shake.

3

But it can supply. The problem is when the Servo goes to 180º he shake, like he is trying to go 200º i think. Moreover when i use myservo.write(pos) it's like i'am modifying the speed, i tried angles since 0º to 180º, but he only rotates in one direction.

4

Command the servo to move to a smaller angle. It will destroy itself, if it keeps hitting the end stop.