Servos keep damaging

hello all!

i'm kind of new here, read forum untill now.

i have big problem, looked questions on internet, found nothing.

please, if can, @ problem , me..

so here problem:

i'm making project 6 servos (3 used actuate mkii robotic claw dagu , 3 used rotate claws). problem servos damaging , don't know why (till have 4 "dead" servos - 3 because of gears , 1 because of controller circuit).

to see big picture:
- use 7.5v power supply (i have devices need voltage) + voltage regulator of 6v (a regulator each servo) http://www.datasheets360.com/part/detail/l7806cv-dg/5536729694200230960/ (no resistor)
- code use below (only servo, use same others):

code: [select]


 #include <servo.h>
 int citire = 0;
 boolean flag = true;
 long elapsed_time = 0;      // millis
 long previousmillis = 0;
 long previousmillis2 = 0;
 long servointerval = 15;
 long interval = 500;
 int pos = 0;               //for millis

 servo left_r;  
 servo down_r;  
 servo right_r;
 
 servo left_p;
 servo down_p;  
 servo right_p;

void for_delay() {
    unsigned long starttimer=millis();      //starts 0.5 seconds delay timer
        {
           unsigned long current_time = millis();
           elapsed_time = current_time - starttimer;
           }
           while(elapsed_time < interval);      //leaves loop 0.5 seconds has passed
 }
   
 void setup() {
   left_r.attach(3);
 down_r.attach(5);
 right_r.attach(6);
 
 left_p.attach(9);
 down_p.attach(10);
 right_p.attach(11);
 
 // start position
 left_r.write(35);
 down_r.write(35);
 right_r.write(35);
 
 left_p.write(160);
 down_p.write(150);
 right_p.write(150);
 
 for_delay();
 
 left_p.detach();
 down_p.detach();
 right_p.detach();
 left_r.detach();
 down_r.detach();
 right_r.detach();
 }
 
 void loop() {
   while(serial.available()){
  citire = serial.read();
 //rotatie
   //left_r
      if(citire == 97){        //a
        left_r.attach(3);;
        if(flag){
           left_r.write(35);
           for_delay();
           flag = false;
         }else{
           left_r.write(125);
           for_delay();
           flag = true;
         }
      }
   }
 }

i thinking maybe should use resistor in line regulator powers servo sure voltage under 6v.
or maybe there problem code, should use instead?:

code: [select]


for(pos = 0; pos < 60; pos+=60) {      //opens arm 60 degrees
      unsigned long servomillis = millis();
     if(servomillis - previousmillis > servointerval)  //created delay 15 milliseconds before next pulse
       {
        previousmillis = servomillis;
        myservo.write(pos);      //moves 5 degrees every 15 milliseconds
       }
   
    }


i hope understand problem , can me.

thanks lot!

later edit:
- servos use are: towerpro mg995 , dgservo s05nf std - both datasheets said accept voltage between 4.8 , 6v
- second code not mine, found here, on forum

maybe you're running them past extremes, far 1 way or other?
some tolerant of that, others not much.
have done servos before or hodge-podge of code , components hoped work?

they go while , poop?  poop right away?
maybe you're trying work , wrecking them?

no resistor help,
7.5v might enough 6v out, if not there no damage.

why won't people sketch out doing, post meaningful photos of setups , on?

Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > Servos keep damaging

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