issue with ESC calibration and control

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my servo doesn't run in reverse.

i tried calibration still doesn't work pwm signal below 90.

i using rc car hobbyking
http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=78041

my code#include <servo.h>

servo steer;
servo accel;


void setup()
{
serial.begin(9600);
accel.attach(10);
steer.attach(11);
accel.write(180);
delay(1200);
accel.write(0);
delay(1200);
accel.write(90);
delay(1200);

}

void loop()
{
accel.write(84);
delay(1200);
 
}
any value below 90 , above 175 car doesn't run

#include <servo.h>

servo steer;
servo accel;


void setup()
{
serial.begin(9600);
accel.attach(10);
steer.attach(11);
accel.write(180);
delay(1200);
accel.write(0);
delay(1200);
accel.write(90);
delay(1200);

}

void loop()
{
accel.write(84);
delay(1200);
 
}
this basic code calibration using.

now when try write value below 90 servo does't work. values greater 90 servo works.


Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > issue with ESC calibration and control


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