what is the difference between these two "towerproMG995" servos

Other Hardware Motors, Mechanics, Power and CNC
1

only the servo with the black wire works fine with the arduino.
And I work with this code:

int servopin = 4;
int pulse = 2500;

void setup()
{
  pinMode(servopin, OUTPUT);
  Serial.begin(9600);
  
}

void loop()
{
digitalWrite(servopin, HIGH);
delayMicroseconds(pulse);
digitalWrite(servopin, LOW);
delay(20);

}

Does anyone here has also the problem with the white wire servo from "TowerproMG995".

The servo with the white wire is the second servo in the youtube movie

In the movie there is a different code uploaded to the arduino board.

servo.jpg
servo.jpg1632×1224 651 KB

servo1.jpg
servo1.jpg1632×1224 554 KB

2

Does the one with the white wire turn 90 degrees to the right all the time and not respond to commands ?

3

The servo with the white wire turns left to the limit of the potentiometer in the servo and jump 10 degrees back and repeat this.

4

Have you seen this post ?
http://forum.arduino.cc/index.php?topic=267419.new;topicseen#new

5

I took the servo appart and found the potentiometer from the black wire servo.
powered the servo, if i turn the potentiometer to the left and right the motor starts spinning, i try to find the middle and its stop.
Oke very well.
Now the servo with the white wire:
It stops only if I turn the potentiometer to the left.
there is a position where the rpm goes very low but it wil not stop, if i twist about 1 degree further to the right it spins on max speed again and also in the middle and the right.

6

Wouldn't it make a lot more sense to test the servos with the SWEEP example rather than with a single pulse width.

In any case, 2500usecs is well beyond the normal range which is from 1000 to 2000.

...R

7

I suggest you stop trying to power the servos from the arduino and use an external power supply similar to the below.