| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine capable of suitably accelerating a circulating body in a configuration for circulating the circulating body by utilizing a stepping motor.SOLUTION: A hybrid stepping motor 33 includes: a rotor 91 disposed at the center; and a stator 90 including first to fourth poles 92-95 disposed around the rotor 91. The rotor 91 is composed of a forward rotor 91a polarized to an N pole, and a back-side rotor 91b polarized to an S pole, and is attached to a rotating shaft while being relatively shifted by 1/2 pitch such that gear teeth provided around the back-side rotor 91b are positioned between gear teeth provided around the forward rotor 91a. Excitation phases of respective poles 92-95 are changed successively, and hence the rotor 91 is rotated. In this case, for starting rotation of the stepping motor 33, an interval for switching the excitation phases is extended and shortened.SELECTED DRAWING: Figure 9 |
