delay function does not appear on oscilloscope

Hello All,
I am trying to influence my servo motor with a delay function. I put the signal on the oscilloscope and I see the square wave but change on the scope when I change the delay value. Can anyone explain the delay function or how I can see it on the scope.
thank you.

// Controlling a servo position using a potentiometer (variable resistor) 
// by Michal Rinott <http://people.interaction-ivrea.it/m.rinott> 

#include <Servo.h> 
 
Servo myservo;  // create servo object to control a servo 
 
int potpin = 0;  // analog pin used to connect the potentiometer
int val;    // variable to read the value from the analog pin 
 
void setup() 
{ 
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
} 
 
void loop() 
{ 
  val = analogRead(potpin);            // reads the value of the potentiometer (value between 0 and 1023) 
  val = map(val, 0, 1023, 0, 179);     // scale it to use it with the servo (value between 0 and 180) 
  myservo.write(val);                  // sets the servo position according to the scaled value 
  delay(15);                           // waits for the servo to get there 
}

That delay isn't part of the signal, it's between signals.

The physical movement takes ages, so the delay is to let the servo get there before we give it a new destination. Delay() is just a pause in the program.

The servo waveform will continue regardless of what your program does, you could have delay(three_weeks) and the result would be the same on your scope.

trying to influence my servo motor

Exactly what "influence" are you trying to achieve?


Rob

Set a pin as an o/p. Toggle this pin just before your delay. Use this to trigger your scope. Monitor the other o/p with your scope input probe.
|______________ Trigger signal o/p
<------------> Delay() will affect this time


| || |_ Servo o/p

OR
Use a digital scope with lots of buffer space that you can scroll through.

Thanks a lot for your reply Some servo's do not seem to work very well with my arduino uno and that code . Al the older servo's work fine but some off the new ones that are called 'digital' have trouble . They do not keep up with potentiometer if it is moved fast . One servo I have trouble with is the hitec. hsr 5995 (that is suppose to be a real good one) That is why I was trying to play with the delay in the code and looking at the signal on the scope . I understand now - thanks to your info - that is not the right approach . I am starting to realise the trouble may be that (very expensive) hsr 5995 . Thanks loads again