Spot welding system and control device for spot welding robot

摘要

A spot welding system (1) according to an embodiment includes a spot welding robot (2) and a control device (4, 4A). The spot welding robot (2) has a plurality of joint axes (J1 to J6) and includes a plurality of motors (M1 to M6) in correspondence with the joint axes (J1 to J6). The control device (4, 4A) drives the motors (M1 to M6). Furthermore, the control device (4, 4A) includes a capacitor (C10, C10A, C10C) that accumulates regenerative electric power generated from the motor (M1 to M6).