Patent ID: 8306660
Filing Date: 2012-11-06
Classification: B25J

Abstract:
1. A device for restoring positional information of a robot provided with a first member and a second member connected in a manner movable relative to each other via an articulation axis; a motor moving the second member relative to the first member; and a sensor outputting a sensor signal according to a driving amount outputting a sensor signal according to a driving amount of the motor, the device being capable of validating positional information depending on the sensor signal based on a reference position of the articulation axis, the positional information is invalidated for a reason that a component affecting a correlation between the sensor signal and a relative movement of the second member relative to the first member is removed or replaced after the correlation is determined with respect to the reference position, wherein the first member and the second member are provided with a first mark and a second mark, respectively, the first mark and the second mark representing a positional relationship between the first member and the second member; and wherein the device comprises: