PROBLEM TO BE SOLVED: To reduce the burden on the processing for the jamming with balls in a control circuit.;SOLUTION: The pachinko game machine has a rotor 4 which receives and transfers the game balls within the playing area, a step motor 26 for rotating the rotator 4 in two directions, a home position switch 27 which detects the passage of the prescribed part of the rotor 4 through the home position during its rotation and a control circuit 20. When the rotor 4 starts its inversion, the control circuit 20 sets the value of the assumed rotation range corresponding to the assumed rotation range exceeding one turn of the rotor 4. When receiving the detection signal from the home position switch 27, the circuit deletes the set value of the assumed rotation range and sets the value of the partial rotation range corresponding to the partial rotation range to the inversion position from the home position out of the preset assumed rotation ranges and makes the rotor 4 start its inversion when the computed value to be updated at the updating timing under the normal rotary operation of the step motor 26 reaches the value equivalent to the value of the partial rotation range or that of the assumed rotation range.;COPYRIGHT: (C)2006,JPO&NCIPI
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