2 servo motors with different rotations

[jkwag]

Hi there
I am working on a project by using 2 servo motors with different rotations as the below code

1. I like myservo to rotate -180 to 0 and 0 to -180 if possible.
2. While myservo is rotating like the question 1, myservo2 is rotating to 90 degree and stay the position for 5 seconds.
   Please give me your thought.
   Thanks, Jay

#include <Servo.h>

Servo myservo;
Servo myservo2;

int pos = 0;
int count=0;

void setup()
{
myservo.attach(9);
myservo2.attach(10);
}

void loop()
{
//I like to rotate this to 0 to -180
for (pos = 0; pos <= 180; pos++)
{
myservo.write(pos);

int pos2;
if (count==3)
//if count==3 after 3 rotation of myservo
  pos2=90;
 
else  
  pos2=0;

myservo2.write(pos2);
//I like myservo2 to be stayed 5 seconds while myservo is rotating
delay(10);

}

for (pos = 180; pos >= 0; pos--)
{
myservo.write(pos);

int pos2;
if (count==3)  
{
  //pos2 = pos + 45;
  pos2=90;
  count=0;
}
else  
  pos2=0;
myservo2.write(pos2);
delay(10);

}
count++;
}

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[cncnotes]

And what has the behaviour of the servos been?

[jkwag]

2 servo motors are rotating well without any giggling and sudden rotation. Just my concern is myservo2 is stayed 90 degree for 5 seconds while myservo is rotating. One of my issues is the myservo2 is in a for loop, so it will be a delayed due to myservo2's stay.
Thanks, J

[cncnotes]

You would be best moving servo2 out of the if statement, and do a non-blocking delay.
Look that up please.

But basically, you would set a time measurement variable and test it every time through loop. When it reaches 5000 ms, you would command servo2 to move.

long myTime = millis(); // set this one time 

if (millis()-myTime > 5000) {
myTime = millis();
//your code
}

Now, you will need to use less than 5000, because you have put a delay in your servo loop

[jkwag]

Hi CNCNOTES
I have tried what you suggested as above in many ways. Due to my lack of knowledge, I couldn't get servo2 stayed a long time and get back to 0 till 3 rotations of servo.
What I wanted to is that myservo is rotating and then after 3 rotations of myservo, myservo2 rotates to 90 degree and stay there for 3-5 seconds and move back to 0degree. This process will be continue till a power down.
Would you give me a detail code so that I can try?
Thanks,

[cncnotes]

@jkwag

if (millis()-myTime > 5000) {
    myTime = millis();
    myservo2.write(90);
 }
else  {
  myservo2.write(0);
}

Try this snippet.
You don't even have to create a pos2 variable, since you only have 2 positions for servo2.

[jkwag]

I have tried using this code inside of my code. One time, myservo2 was rotating to 90 and stayed with giggling sometimes, but got back to 0. This was what I did.

#include <Servo.h>

Servo myservo;
Servo myservo2;

int pos = 0;
int count=0;
long myTime=millis();

void setup()
{
  myservo.attach(9);
  myservo2.attach(10);
}

void loop()
{
//I like to rotate this to 0 to -180 
 
  for (pos = 0; pos <= 180; pos++)
  {
    myservo.write(pos);

 if(millis()-myTime>3000)
{
  myTime=millis();
  myservo2.write(0);
}
else
{
  myservo2.write(90);
}


    //myservo2.write(pos2);
    //I like myservo2 to be stayed 5 seconds while myservo is rotating
    delay(10);
  }
  

  for (pos = 180; pos >= 0; pos--)
  {
    myservo.write(pos);
   
    delay(10);
  }
count++;

}

[cncnotes]

Is it working like you expected it to?

[jkwag]

No I am still struggling and I made a miss-typing on the previous email which I made you confused. It didn't go back to 0 position. I didn't work. Any idea?

[cncnotes]

Please try the following:

int pos2 = 0; 

// in loop()
if (millis()-myTime > 3000) {
    myservo2.write(pos2);
    if (pos2 == 0)  {
        pos2 = 90;
        }
else {
    pos2 = 0;
}

myTime = millis();

} 

And don't forget to define int pos2 = 0; before setup()

[jkwag]

Hi CNCNOTES
I have tried this as above. Now it is working. This is what I wanted for 2 servo motors. I do appreciate on this!
Thanks, Jay