Abstract: A machining system includes, a tool configured to machine a workpiece, a motor configured to rotate the tool or the workpiece, a controller configured to control the motor, a measurement device configured to acquire a load current of the motor, the controller is configured to change a rotational speed of the motor when a Mahalanobis distance exceeds a threshold, the Mahalanobis distance is a value determined by using a parameter based on the load current acquired by the measurement device in a specific machining range of the workpiece, and the parameter based on the load current includes a parameter obtained by performing Fourier transform on the load current and a measured value of the load current.

Abstract: A cleaning apparatus and method which includes spraying high pressure air obliquely onto a cleaning surface from an air nozzle disposed in the vicinity of the cleaning surface of a cleaning object to be cleaned. A recovery portion of the cleaning apparatus which is disposed in front of an outlet port of the air nozzle recovers at least air containing foreign matter removed from the cleaning object by making the air exhaust into an exhaust introducing passage along a wall surface of an air guide. The recovery portion of the cleaning apparatus includes an air guide section disposed in front of the outlet port of the air nozzle, and an air cover section, which forms an exhaust introducing passage for recovering the air that flows along an air guide wall surface of the air guide section.

Abstract: A cleaning apparatus includes air supply means for spraying high pressure air obliquely onto a cleaning surface from an air nozzle disposed in vicinity of said cleaning surface of a cleaning object to be cleaned; and recovery means, disposed in front of an outlet port of said air nozzle, for recovering at least air containing foreign matter removed from said cleaning object by making said air exhaust into an exhaust introducing passage along a wall surface of an air guide. The recovery means is constituted by an air guide section disposed in front of the outlet port of the air nozzle, and an air cover section, which forms an exhaust introducing passage for recovering the air that flows along an air guide wall surface of the air guide section.