fxmech:
I have a small servo driving sketch using the servo library.
Its working fine but upon powerup the servo rotates a few degrees CCW.
Normally its not a big deal but I am using it to drive a fragile mech and its possible it could damage something if the servo jumps out of its assigned min/max limits.Is there a way to eliminate this little jolt at powerup??? It happens before the sketch reaches the setup() function so I'm assuming its happening as part of the bootup routine and has nothing to do with my sketch...
#include <Servo.h>
Servo mouthservo;
const int mouthServoPin = 8;
const int mouthUpLimit = 1550;
const int mouthDownLimit = 1450;
int mouthServoPos = mouthUpLimit;
void setup()
{
mouthservo.attach(mouthServoPin,mouthDownLimit,mouthUpLimit);
mouthservo.writeMicroseconds(mouthUpLimit);
delay(15);
}
void loop
{
}
All hobby type servos are subject to jumping or being twitchy when first powered up. They are not designed with any last valid position memory to survives a power off and on cycle. This was true even in their original intended application of radio control aircraft controls. Perhaps some of the newer 'digital' servos with proper servo programmer support have a failsafe position on power up mode?
Lefty