Servo not moving

Question

I have connected my servomotor (MG996R) to my L293D motor shield, which is connected to an Arduino Uno R3 Board.

I use 4x AA 1.2V NiMH batteries to power the shield, and a regular 9V battery to power the Arduino separately. I've removed the jumper wire on the shield.

I've tried uploading all the example codes I could find, multiple times, yet none of them work. The servomotor simply doesn't move at all.

Is there anyway I could see if my servomotor is broken ? Maybe the wiring is wrong, but I don't think so. Orange is for signal, Red is for + and Brown is for GND.

Could someone help troubleshoot the problem ? Thanks !

PS : here is the example code I use

#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(9);  // 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 15ms 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 15ms for the servo to reach the position
  }
}

Answer 1

You have two problems Both of them is related to your power supply :

• 1st, max. Voltage requirement for your servomotor is 6 volts, not 9 volts

• 2nd، your batteries are weaker than servo's need. Your servomotor need 2.5 Amps. In the max. Torque.

So, over-voltage and not enough current is your fault (According to 996R servomotor datasheet). Change your power supply by suitable one