Phidgets Forums

I wrote a simple program to talk to a Phidgets servo controller, and hooked up a 9 gram servo to it. It is based on Simple Servo.

The program is contained here:

http://igor.chudov.com/tmp/servo.c

After I wrote it, it was working. Meaning that the servo would rotate as instructed and stopped.

Then I forgot about it for a day, rebooted my Linux system, and after that as soon as I start the program, the servo begins to spin endlessly.

It seems to happen even if I comment out the part responsible for actually actuating the servo and occurs during initialization.

Any idea why a servo would endlessly spin and not stop?

Are you sure you're setting the min and max pulse width properly with setServoParameters? If the servo is running even when it's not given a target position, that means that the zero position is being interpreted by the servo as something that's not zero. Have a look at this page for more information.