Patent ID: 9021873
Filing Date: 2015-05-05
Classification: B25J,G01L,G01M,G05B

Abstract:
1. A brake abnormality diagnosis method for diagnosing an abnormality in a brake of a brake-equipped motor provided in a robot or a machine tool, the method comprising: diagnosing whether or not there is the abnormality in the brake while the motor is excited and the brake is activated; and notifying the abnormality in the brake, when said diagnosing indicates that there is the abnormality in the brake, without interrupting the excitation of the motor and without releasing the brake, wherein the motor includes an output axis that is droppable under gravity when the excitation of the motor is interrupted and the brake is released, in response to the abnormality diagnosed in the brake, the excitation of the motor is maintained and the brake remains activated to prevent the output axis of the motor from dropping under gravity, and the brake abnormality diagnosis method further comprises, when said diagnosing indicates that there is the abnormality in the brake,