Question Can't change the Rotation.z value to a duplicate Object

Hello,
Just started with Unity after I left Swift/xCode and I can't find a solution to my problem.
I duplicated an object in the Scene and I positioned it with a new rotation value.



But when I tried to spin this duplicate object it takes the rotation.z value of the original.
If I make it rotate 30º it goes 30º from the position of the original object, never 30º from its position.

In my script I tried to obtain the Rotation.z value of this duplicate object to then add the rotation value that I want.
But this solutions didn't work at all.

Code (CSharp):

1. public class Vayven : MonoBehaviour
2. {
3.     [SerializeField] GameObject rayo2;
4.     float r;
5.     public float anguloIni;
6.  
7.     void Start()
8.     {
9.         anguloIni = rayo2.transform.rotation.z;
10.     }
11.  
12.     void Update()
13.     {
14.         float Angle = Mathf.SmoothDampAngle(transform.eulerAngles.z, anguloIni + 30, ref r, 1.0f);
15.         transform.rotation = Quaternion.Euler(0, 0, Angle);
16.     }
17. }

 

Reading / writing to the .eulerAngles property is almost always going to surprise you. Here's why:

All about Euler angles and rotations, by StarManta:

https://starmanta.gitbooks.io/unitytipsredux/content/second-question.html

 

ALSO... THIS:

Is NOT an Euler angle. Don't use it. That value has zero meaning to you and I.

 

Thanks Kurt-Dekker. I'm going to study more about C# and Unity. This is not that straightforward coming from swift as I thought

 

Im not sure if this helps you out, but a lot easier for my brain was to use the function "transform.Rotate" (there are few overrides). Most time I don't need to bother about angles, only game coordinates, vectors, and around what will be rotation.

Code (CSharp):

1. void Update()
2. {
3.     // Rotate character/vehicle left and right by player input
4.     transform.Rotate(Vector3.up, turnSpeed * horizontalInput * Time.deltaTime);
5. }

https://docs.unity3d.com/ScriptReference/Transform.Rotate.html