遊技機

摘要

PROBLEM TO BE SOLVED: To prevent a game machine from that a movable member driven by a stepping motor is detected that its operation is abnormal though it operates normally with the rotational vibration of the rotor of the stepping motor, simply and with high accuracy.SOLUTION: A game machine detects drive abnormality of a stepping motor based on a signal from a rotation detecting device for selectively outputting a first detection state or a second detection signal according to the rotation angle of a rotating shaft in the stepping motor driving a movable member. The game machine is configured as follows: drive monitoring information is updated in the direction apart from a reference value and in a direction returning to a reference value, respectively, according to the detection of the first detection state and the second detection signal, by periodical monitoring of the signal from the rotation detecting device; and a decision is made that the drive abnormality is caused when the time from arriving at a first drive decision threshold value until returning to a second drive determination threshold value and the time from returning to a second drive decision threshold value until arriving at a first drive determination threshold value exceed a predetermined time.