A thermal displacement state (target thermal displacement state) in which thermal displacement of a machine tool is saturated when the machine tool is operated based on a machining program is previously stored, and a warm-up operation pattern of a motor is determined so as to approach the target thermal displacement state. The motor is driven based on the warm-up operation pattern and the warm-up operation of the motor is stopped if the thermal displacement state of the machine tool is within a predetermined range.

A machine tool of the present embodiment includes: a column that is disposed in a vertically standing manner and has a predetermined linear expansion coefficient; a spindle head that is supported by the column and supports a horizontal spindle for attaching a tool thereto; and a reference bar that is disposed separately from the column and has a linear expansion coefficient that is different from the linear expansion coefficient of the column wherein the column has a column-side measurement target zone, the reference bar has a reference bar-side measurement target zone, and a measurement means measures a distance between the column-side measurement target zone and the reference bar-side measurement target zone.

Machine tools are provided, including machines tools of large dimension, which include a bench, an upright base, control elements for the translation of the upright base, an upright base position sensor comprising an optical line or linear encoder fixed to the bench, detection elements for detecting the temperature of the optical line and management elements for processing the temperature signals coming from the optical line temperature detection elements and the signals of the upright base translation control elements to determine a correction signal for the upright base translation control elements according to at least one temperature detected along the optical line.

A machining center includes a rectangular base; two walls disposed on two sides of a top of the base respectively; two parallel rails disposed on a top of each wall, the rails extending in X-direction; two sliding members each slidably disposed on the rails on each wall; two parallel rail members disposed on a top of each sliding member, the rail members extending in Y-direction; a transverse beam having a first end secured to one sliding member and a second end slidably disposed on the other sliding member; and a sliding element slidably mounted on a front surface of the transverse beam. The second end of the transverse beam may move relative to one sliding member in response to heat buildup in the transverse beam.

Disclosed is a cutting machine and a method for controlling a cutting machine with a retrieval of a cutting job for processing an object on a working surface of the cutting machine with a cutting device, a defining of a cutting path based on the cutting job, a continuous retrieval of position data, and a guidance based on the position data, of the cutting device along the cutting path for processing, in particular cutting, the object, characterized by a temperature compensation functionality with continuous retrieval of temperature data from one or more temperature sensors, and using the temperature data for defining the cutting path and/or for adjusting the cutting path.