Continous Servo Issue

Other Hardware Motors, Mechanics, Power and CNC
1

Hello,
So I am using a Continuous Servo Motor with the Servo Library, except when I do the write() function, 0-90 doesn't change the speed when I alter the numbers in that range, it's just going "reverse" at a constant speed. But when I do 90-180, it changes.

Here is the documentation for this library: Servo/docs/api.md at master · arduino-libraries/Servo · GitHub

Here is my code:

#include <Servo.h>
Servo myservo;

int pos = 0;


void setup() {
  // put your setup code here, to run once:
  myservo.attach(2);
  myservo.write(93);
  delay(1000);

  myservo.write(10);
  delay(500);
  myservo.write(93);
  delay(1000);
  


}

void loop() {
  // put your main code here, to run repeatedly:

}

Please help ASAP.

2

A continuous servo takes myservo.write(90); as a "stop"... less than 90 means "counterclockwise" and greater than "90" means "clockwise." The farther from "90", the faster. "0" means "full speed CCW" and "180" means "full speed CW."

No.

2 Likes
3

Forgot to mention. Thats another issue. At 90, it just keeps on moving. At 93, it stops

4

The values (for "center") will vary when using degrees.

To more accurately control a continuous servo use writeMicroseconds();

5
  • Sounds okay.
6

Try this test program, connect servo signal wire to pin 9, forget degrees, enter numbers from 544 to 2400.

/*
 Try this test sketch with the Servo library to see how your
 servo responds to different settings, type a position
 (544 to 2400) in the top of serial monitor and hit [ENTER],
 start at 1472 and work your way toward zero (544) 20 micros
 at a time, then toward 2400. 
*/
#include <Servo.h>
Servo servo;

void setup() {
  // initialize serial:
  Serial.begin(9600); // set serial monitor baud rate to match
                      // set serial monitor line ending to "NewLine"
  servo.write(1472); // should be stop position
  servo.attach(9);
  prntIt();
}

void loop() {
  // if there's any serial available, read it:
  while (Serial.available() > 0) {
    // look for the next valid integer in the incoming serial stream:
    int pos = Serial.parseInt();
    if(Serial.read() == '\n'){} //skip 1 second delay
    pos = constrain(pos, 544, 2400);
    servo.write(pos);
    Serial.print("microseconds =  ");
    Serial.println(servo.readMicroseconds());
  }
}
7

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