How to control the servo motor JX Servo PDI-6225MG-300 Degree_version2?

Other Hardware Motors, Mechanics, Power and CNC
1

Hi all,

I want to control the JX Servo PDI-6225MG-300 Degree using Arduino.
IF I put the angle number, the motor should go the exact angle.
For example, IF I put the 200, then motor will be located in 200 degree.
BUT, when I tried to use my code, it is not working well.
I mean the motor showed weird moving. Please check the below link. (I want to upload the video but I don't know how to upload it.)

#include <Servo.h>
int servoPin = 9;
int val = 0;

Servo servo;
void setup() {
  Serial.begin(9600);
  servo.attach(servoPin);
}

void loop() {
  if(Serial.available()){
    val = Serial.parseInt();
  } 
  if(val > 0 && val <= 300){
    val = map(val, 0, 295, 544, 2400);
    servo.writeMicroseconds(val);
    Serial.print("Current Val : ");
    Serial.println(val);

  }
}

I used JX Servo PDI-6225MG-300 Degree motor and spec is follows.

Brand Name: JX Servo
Item Name: PDI-6225MG-300 Degree
Max Angle: 295°
Dead Band: 4μs
Maximum Pulse Width: 500-2500us (for control board)
Motor: Iron core
Voltage range: 4.8V-6.6V
Speed (4.8V): 0.25 sec / 60 degree
Speed (6V): 0.21 sec / 60 degree
Torque (4.8V): 19.9 kg.cm
Torque (6V): 25.3 kg.cm
Size: 40.5 x 20.2 x 38mm
Weight: 62g
Cable: JR 265 mm
Bearing: 2BB
Output Teeth: 25T (Futaba Universal)

I used extra power supply. I also put the model in the youtube. The OUTput voltage is 5v and 3~5A.
EV-K1205 DC-DC converter
(Buy at low prices in the Joom online store)

It will be awesome If I solve this problem.
Many thanks

2

Have you got the grounds connected?

Edit: duplicate - reported.

Also,

Installation & Troubleshooting
For problems with Arduino itself, NOT your project

3

Sorry, I am beginner thus, I think I could not understand the "grounds connected".

I just connected Motor + - with converter OUTPUT + -.

Is not converter OUTPUT - is not ground?

4

The servo has three wires; power (usually red), signal (yellow) and ground or 0V (black or brown).
The ground should be connected to both the supply ground and the Arduino's ground pin.

5

Oh, I solved it Thanks!