Fuji Machine Mfg. Co., Ltd.

Atsushi Yamazaki

Noriaki Iwaki

Takeyoshi Isogai

An electrically operated chucking apparatus including (a) an electrically operated chuck including at least two movable members movable toward and away from each other, and at least two drive devices which include respective electrically operated actuators operable to move the at least two movable members, respectively, toward and away from each other, and (b) a control device operable to control the at least two drive devices, and wherein the control device includes: a drive control portion operable to control the at least two drive devices such that each of at least one of an actual position and an actual speed of movement of the at least two movable members changes toward a predetermined target value; and a load detecting portion operable to detect a load acting on the at least two movable members during operation of the drive control portion to control the at least two drive device. The drive control portion is arranged to command the at least two drive devices to terminate movements of the at least two movable members when the load detected by the load detecting portion has increased to a predetermined threshold.

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Toyota, Japan

Atsushi Yamazaki