To always stop a motor cam at a home position and prevent the appearance of a plurality of balls at a shooting position at a game start.
When the power supply of a pachinko (Japanese pinball game) machine is turned on, a ball shooting pulse motor 1 is normally rotated at a high speed and at low torque on a high pulse driving frequency, on the basis of a single-phase excitation system, and a motor cam 2 is stopped at a position where the motor cam 2 comes into contact with the cam follower 5 of a shooting hammer 3. Thereafter, the ball shooting pulse motor 1 is reversely rotated at a high speed on the basis of a similar single-phase excitation system, thereby returning the motor cam to the home position thereof. Furthermore, the ball shooting pulse motor is continuously rotated on a normal pulse driving frequency on the basis of a two-phase excitation system during a game. In this case, motor cam 2 is rotated up to the home position of the cam and, then, the ball shooting pulse motor 1 is stopped, regardless of timing for a player to stop the game.
MIZUNO TAKAHISA
MITSUOKA HIDEKI
ASAMA SEISAKUSHO KK
Next Patent: START HOLE DEVICE FOR PACHINKO GAME MACHINE