servo motor controller using 8051

[jayanthyk192]

Hi,

i just built a servo motor controller using an 8051.the program did its job(PWM),but the problem is in the motor.at some positions the motor keeps vibrating and does not stop.it gets locked in position but it vibrates.this happens for only some positions.the code does not have a problem because i checked the output with an LED,and it worked fine(dim and high).please help me debug.

thank you.

 

[ckshivaram]

test it in proteus and then debug. or put your code and circuit here.......

 

[faylindstrom]

yes Mr. Ckshivaram thats right, we can test it on proteus and debug it.
so we can know our schematic is right or not when we debug it.

 

[jayanthyk192]

test it in proteus and then debug. or put your code and circuit here.......

i dont have proteus.so,here's the really simple code:

#include<reg51.h>
#define out P2
sbit up=P1^0;
sbit down=P1^1;

void delay(int x)
for(i=0;i<=x;i++);

main()
{
int on=100,off=100
  while(1)
   {
    if(up==1 && on<=200){on++;off--}
    if(down==1 && on>=0){on--;off++}
    out=0;
    delay(on)
    out=255;
    delay(off)
    }
}

i wrote the code without using 'timers',as i'm not too familiar with them.so please ignore efficiency for now.