Andrew Knee's "Robotic Chess Machine"
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Robotic Chess Machine

Construction

I started building "Robotic Chess" by sanding and staining the wood base, which are approximately 16 x 16 inches.  After the base, the sliders were mounted and the gantry was constructed to be attached to the sliders.  The motor belt and pulley for the Y-axis was attached to the base, and the belt was attached to the slider.  The horizontal mechanism for the X-axis was mounted to the gantry, and the vertical mechanism for the Z-axis was attached to the horizontal mechanism.  Then the gripper was attached to the vertical mechanism.  Finally, the wires for all the motors were stripped, soldered, and crimped.  The final piece of the project, before the programming of the robot is the chessboard.

How it Works

Through programming, the robot is able to move the chess pieces on the chess board.  This is done by sending pulses ot the individual stepper motors.  The robot is wired to the computer using a bread board interface, located between the robot and the computer.  Two stepper motors on the robot can be commanded to move forward, back, left, or right to move the chess piece around the chess board.  The third stepper motor moves the chess piede off of the board and back down, allowing the chess pieces to pass freely of each other.  A gripper, which utilizes a solenoid, grabs the chess pieces, so when the vertial motor is used, the chess piece moves with it.