Abstract: A spot welding system according to an embodiment includes a spot welding robot and a control device. The spot welding robot has a plurality of joint axes and includes a plurality of motors in correspondence with the joint axes. The control device drives the motors. Furthermore, the control device includes a capacitor that accumulates regenerative electric power generated from the motor.

Abstract: A robot controlling apparatus ensures that the maintenance work can be property and safety practiced and efficiently uses the space of the housing of the robot controlling apparatus. A robot controlling apparatus is provided with a first housing (1) for accommodating first internal devices (6), a second housing (2) for accommodating second internal devices (7), and a front door (3) supported by a first hinge (4), which is provided on a side of the first housing, being capable of freely opening and closing, wherein a second hinge (5) is provided on the sides of the first and the second housing and the entire first housing is supported by the second hinge being capable of freely opening and closing with respect to the second housing and the accommodating portion (11) extending from a front portion of the second housing under the second front opening.

Abstract: a robot controller ensures the maintenance work property and the safety and practically uses a space in a housing of the robot controller. A controller for an industrial robot is provided with a first housing (1) for accommodating first internal devices (6), a second housing (2) for accommodating second internal devices (7), and a front door (3) supported by a first hinge (4), which is provided on a side of the first housing (1), being capable of freely opened and closed, wherein a second hinge (5) is provided on the sides of the first (1) and the second housing (2) and the entire first housing (1) is supported by the second hinge being capable of freely opening and closing with respect to the second housing (2).