Patent ID: 7546211

Claim:
A condition detection apparatus that detects a current operational condition of a linear rolling motion guide apparatus, the condition detection apparatus characterized by comprising: a detection device that detects elastically-occurring undulations which are attributable to at least any one of collisions between the rolling members and a rolling surface included in the linear rolling motion guide apparatus, slippages at a contact section of the rolling surface and the rolling members, collisions between rolling members or slippages between rolling members at a contact section, or a crack occurring at at least either one of the rolling members or the rolling surface, occurring when a plurality of rolling members included in the linear rolling motion guide apparatus self-rotate and revolve at the same time, and generates an electric detection signal corresponding to a detected undulation; a first generation device that generates a first parameter indicating an intensity of the undulation based on the generated detection signal; and a judgment device that judges the operational condition to be normal when the generated value of the first parameter is below a first threshold that is preset for the first parameter.