A machine tool for machining a piece has an axis of rotation A, and includes a no-force precision machining unit to machine the piece, a first spindle, a first clamping device clamping the piece and mounting it on the first spindle, and a machine parameters guidance system. The guidance system guides a controller for the machining unit to control a first machining phase of the piece on the first spindle programmed to obtain a blank mounted on the first spindle, with target dimensions are 0.5% to 20% greater than the final dimensions, then to modify the machining parameters to control, starting from the blank on the first spindle, a second machining phase to remove a quantity of material to obtain the finished piece, with the final dimensions and a roughness of less than 40 nm. A method for machining a piece using such a machine tool is also described.

The present invention provides a means capable of accumulating images representing captured states of work without requiring cumbersome input operations to be made by a worker. Terminal device 11 is a mobile communication terminal device incorporating a camera, and can communicate data with server device 13 via mobile phone network 8 and Internet 9. A worker who performs work in work area 7 accesses server device 13 using terminal device 11 and causes terminal device 11 to display a list of tasks, of which the worker is in charge; from server device 13. When the worker who has selected a work detail item corresponding to work to be started by the worker from the list performs the recording start operation, terminal device 11 sequentially transmits image data captured at predetermined time intervals by the camera to server device 13. The image data are stored in server device 13 in association with data for identifying work details to be recorded. The manager or the like of the work accesses server device 13 using terminal device 15 and can confirm states of work performed in the past by viewing images of the work.