Basic Sketch for Servo Shield

[ama530]

Hi everyone,

New to the Arduino. My son and I would like to find out if anyone has a basic sketch for an Adafruit Servo Shield controlling 1-3 servos. I understand the code for a single servo wired directly to the Arduino and have no problems. But I am having a problem trying to understand the code that is on the tutorial for the shield. I understand most code but I can't wrap my head around this for some reason. The only movement I get from the servo sketch is slight movements until it hits its limit and stops. It is a TowardPro MG996R. LCDs, steppers, LEDs, etc.. I'm good with. This is driving me a little nuts. Any help or advice would be much appreciated.

Thanx,
Chris & Aaron

[Franklin97355]

Two questions, does your servo work when you wire it directly into the Arduino and have you tried some of the examples (or this http://learn.adafruit.com/3d-printed-an ... robot-head)

[adafruit_support_bill]

The example code that comes with the library sequences through all 16 channels and sweeps each servo back and forth. Does that code work for you?

[ama530]

Hey guys,

Sorry it took me so long to reply. Yes, the servo works when I have it wired to the Arduino directly. I can run the example sketches in the software. Sweep, Knob, etc... When I use the servo shield with the Adafruit 'servo' sketch it just rotates ccw at like 30° increments until it hits the stop. I have another mini servo from Radio Shack that just goes ballistic and slams into the stop and starts grinding like mad. I have the servo connected to pin set 0.

[adafruit_support_bill]

the servo works when I have it wired to the Arduino directly.

Good. That rules out a problem with the servo.

When I use the servo shield with the Adafruit 'servo' sketch it just rotates ccw at like 30° increments until it hits the stop.

Definitely sounds like a problem with the servo shield. If you can post some clear photos of the front and back of the shield we'll check for any assembly issues.

[ama530]

Please see attached. I have no solder bridges and everything is pretty sano.

[adafruit_support_bill]

I don't see any problems there. If you contact [email protected] with a link to this thread we can send you out a new shield.

[ama530]

Will do. Thank you for your assistance.