Knob with speed limit

Projects Programming
1

can i add speed limit to this code?

Thanks

2

What sort of servo are you using ? A proper one or a continuous rotation one ?

If the latter, then you can limit the top speed by changing the maximum value output in the map() function to less than 179. If it is a proper sevo then I don't understand the question.

3

Hi,
This is the servo Im using:

What i want is when i turn the knob all the way, the servo will go slower to its final position and not at full speed

Thanks

4

Would it be OK if it moved slowly at all times, which would be fairly easy ?

5

I think this might work but I can't test it since my last arduino is tied up in a project right now.

// 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

int speed = 5;

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)
  if( val > myservo.read() + speed) myservo.write( myservo.read() + speed) ;
  else
  if (val < myservo.read() - speed) myservo.write( myservo.read() - speed) ;
  else  myservo.write(val);                  // sets the servo position according to the scaled value
 
  delay(15);                           // waits for the servo to get there
}
6

Thanks, this code works,
however i need it slower than "1"
i rtied "0.5" it doesnt work

7

Where did you put 0.5 instead of 1 ?

8

int speed = 0.5;

9

JoZee:
int speed = 0.5;

Integers are whole numbers without decimal points.

...R

10

so 1 in the minimum value?

11

JoZee:
so 1 in the minimum value?

In this case, yes. You could use writeMicroseconds instead of write - it'll give you more granular control. You'd need to change the range on the map appropriately though.

For a crude but simpler option, just increase the size of the delay; just be aware that it'll be less responsive.