The invention relates to systems for steering machine tools and in particular to systems that display information to an operator of the machine tool. Such a system comprises a manually controlled cutting tool. The system receives data that defines a model of a desired cut to be made on a workpiece by the cutting tool. The system receives further data related to the current position of the cutting tool in, at least, two dimensions. A processor generates from the received data a display. The display shows the desired cut to be made and a cutting tool icon at the current position of the cutting tool relative to the desired cut. The display also shows an indication of the current error between either the current position, or direction of travel, of the cutting tool and the desired cut. An operator does not need to look at the workpiece, a drawing and the Digital Read Out simultaneously as with existing systems.

An information processing device is connected to a measurement device provided in the vicinity of a machine tool for machining a workpiece using a tool and a numerical control device configured to control the machine tool. The information processing device includes: a display unit configured to display information; a first acquisition unit configured to acquire, from the measurement device, measurement information measured by the measurement device; a second acquisition unit configured to acquire, from the numerical control device, state information indicating a state of the machine tool; and a display control unit configured to cause the display unit to display the measurement information and the state information.

An information processing device is connected to a measurement device provided in the vicinity of a machine tool for machining a workpiece using a tool and a numerical control device configured to control the machine tool. The information processing device includes: a display unit configured to display information; a first acquisition unit configured to acquire, from the measurement device, measurement information measured by the measurement device; a second acquisition unit configured to acquire, from the numerical control device, state information indicating a state of the machine tool; and a display control unit configured to cause the display unit to display the measurement information and the state information.

A control device for a machine tool, said control device being provided with a display unit that displays machining information and a display control unit that generates an image to display on said display unit. The display control unit is designed so as to divide up the display region of the display unit, generating a plurality of subregions. Via input from an operator, the sizes of said subregions can be changed. The display control unit changes the display format of the machining information in accordance with the machining information to be displayed and the sizes of the subregions.

A control device for a machine tool, said control device being provided with a display unit that displays machining information and a display control unit that generates an image to display on said display unit. The display control unit is designed so as to divide up the display region of the display unit, generating a plurality of subregions. Via input from an operator, the sizes of said subregions can be changed. The display control unit changes the display format of the machining information in accordance with the machining information to be displayed and the sizes of the subregions.