Very impressive!

Good work, man!

please tell me how to do this!

i have 3 servo's kicking around

i am dying to use them  

I like it, produces the look of those "wiggly lines"-stiles in Google Sketchup...

Keep on the good work!

I can't make a picture (my camera doesn't work) so I've made some drawings.

draw 1:

draw 2:


Important:
-When arm is setted as shown on draw 2, servos have to be in their middle positions (90 degree)
-distance between servo 1 and servo 2 has to be the same as distance between servo 2 and servo 3
-length of the parts is not very important


I think that everyone here know how to connect servos to the arduino so I will not describe it.



Arduino code:
Code:

#include <Servo.h>

#define led0 13
#define Servo1Pin 17
#define Servo2Pin 18
#define Servo3Pin 19

Servo servo1;
Servo servo2;
Servo servo3;

byte s1=90;
byte s2=90;
byte s3=90;

byte DELAY=10;
boolean inProgress=false;

//#include <LiquidCrystal.h>
//LiquidCrystal lcd(12, 8, 7, 6, 5, 4, 2);

void setup()
{
   // lcd.begin(16,2);
  Serial.begin(9600);
  pinMode(led0,OUTPUT);
  attachServos();
}

void loop()
{

  digitalWrite(led0,inProgress);

  if(Serial.available())
  {

    if (Serial.read()==0xAA)
    {
      do{
      }
      while(Serial.available()<=4);
      //serwa
      s1=Serial.read();
      s2=Serial.read();
      s3=Serial.read();
      DELAY=Serial.read();
      inProgress=true;
    }
  }


    if (servo1.read()>s1) servo1.write(servo1.read()-1);
    if (servo1.read()<s1) servo1.write(servo1.read()+1);

    if (servo2.read()>s2) servo2.write(servo2.read()-1);
    if (servo2.read()<s2) servo2.write(servo2.read()+1);

    if (servo3.read()>s3) servo3.write(servo3.read()-1);
    if (servo3.read()<s3) servo3.write(servo3.read()+1);


    if (inProgress==true && servo1.read()==s1 && servo2.read()==s2 && servo3.read()==s3)
    {
      Serial.print(1,BYTE);
      inProgress=false;
    }

    delay(DELAY);
    
    /*
        lcd.clear();
        lcd.print(servo1.read(),DEC);
        lcd.print("-");
        lcd.print(s1,DEC);
        lcd.print(" ");
        lcd.print(servo2.read(),DEC);
         lcd.print("-");
        lcd.print(s2,DEC);
        lcd.setCursor(0,1);
        lcd.print(servo3.read(),DEC);
         lcd.print("-");
        lcd.print(s3,DEC);
        lcd.print(" ");
        lcd.print(DELAY,DEC);
        lcd.print(" ");
*/
  
}





/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void attachServos()
{
  
  servo1.attach(Servo1Pin);
  servo2.attach(Servo2Pin);
  servo3.attach(Servo3Pin);
}



 

and finally the PC software is here:
http://ezio.ovh.org/pliki/arm_plotter.rar

There is a file "settings.txt". You can set up and down limit of the servos to avoid destroy your arm.

really impresive work........... makes my think....... going to give it a try............................. thanks for sharing......  

Hey man, very cool project. You should just work on the appearance of the arm more and it should be perfect.
How do u know that the servo has reached the required angle for a specific x,y location...before feeding the next angular position??
I really need to know how this is implemented.
Thanks.

I thought servo.read() only returned what angle you'd set it to - the servo doesn't have any way of returning it's actual physical position. Or am I wrong?

Andrew