Front View

From the front view of the arm, you can see how the top of the arm is attached to the lower part. A black connecting piece with two poles through either end (with one of the poles attached to a gear) allows the lower part of the arm to swing when the motor is turned on. Bushings are used to hold the black poles in place.

Back View

On the back side of the arm, a light sensor is attached to aid in centering the arm. While in search mode, the arm rotates from side to side. Once a Dane has been retrieved, the arm uses the light sensor to center iteslf in fornt of the light shown in the lower middle of this photo.

Side View

The side view shows the full view of the arm: the upper section, the lower part, and the claw at the very bottom. The light sensor is also in view, as is its positioning directly oppostie of the light. The blue puddy is used to cover the holes in the legos and prevent light pollution.

Upper Side View

The gearing that is used to power the motor is shown in this image. The black chain helps solve spacing problems and helps provide a gear ration of 2.5:1. The 16-tooth gear is necessary because 8-tooth gears are incompatible with 40-tooth gears.

Inner View

The long black pole shown in this image is connected to a motor further down in Grendel's base. The 40-tooth gear features gray studs that the legos are hooked into. When the motor turns, this allows the arm to rotate back and forth in its search for Danes.