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The Learning Brick Sorter • Masterpiece 2 57

The Arm

The Arm sub-assembly will be mounted on top of the turntable, which is part of the
Body sub-assembly.The Arm sub-assembly features two pneumatic pistons:

■ A large pneumatic piston used to lift and lower the hand
■ A small pneumatic piston used to open and close the hand that will grab
the brick

NOTE

For more information on the mechanics of pneumatics, please refer to
Masterpeice 4 “PneumADDic II” by Kevin Clague.

Arm Step 0

The short rubber band is used to increase
the grip that the hand has on the brick.
Thread the rubber band over the pin on
one side of the liftarm, then pull it gently
below the liftarm, and thread it over the
pin on the other side.