When warm-up operation is started, a machine tool acquires an atmospheric temperature around the machine tool and selects a warm-up operation program on the basis of the acquired atmospheric temperature. A warm-up operation command suitable for the atmospheric temperature is given to the control unit according to the selected warm-up operation program. A movable unit of the machine tool can be thereby controlled, and optimum warm-up operation for the atmospheric temperature can be eventually performed.

A machine tool includes a workpiece holding unit to hold a workpiece. A tool holding unit holds a tool. At least one of the workpiece holding unit and the tool holding unit is drivingly rotatable or drivingly movable in a predetermined direction to machine the workpiece with the tool. Temperature sensors are attached to members constituting the machine tool. An estimator calculates an environmental temperature system thermal displacement amount due to a heat source outside the machine tool. A correction magnification processor calculates an environmental temperature system thermal displacement correction amount. Another estimator calculates a driving system thermal displacement amount due to a heat source in the machine tool. A thermal displacement correction amount adder obtains and outputs a total thermal displacement correction amount based on which the machine tool performs thermal displacement correction control.

A temperature control system for a transmitter chip in a consist is disclosed. The temperature control system may include a heater configured to provide heat to the transmitter chip, and a sensor configured to detect a consist condition and generate a signal indicative of the detected consist condition. The temperature control system may also include a controller in communication with the heater and the sensor. The controller may be configured to receive the signal indicative of the detected consist condition, compare the detected consist condition with a predetermined consist condition, and selectively control the heater to provide heat to the transmitter chip based on the comparison.

A machine tool rapid compensation system includes: a trigger acquisition module, a laser interferometry measurement module, a data analysis and compensation module, and a communication module. The trigger acquisition module receives a trigger acquisition instruction, converts an encoder position value into a pulse value, transmits the pulse value to the laser interferometry measurement module, retrieves parameter information and compensation point information of a machine tool from a numerical control system, and generates a machine tool operation code and a measurement preparation signal. The laser interferometry measurement module receives the measurement preparation signal and the pulse value to obtain error data, environmental data, and expansion compensation values. The data analysis and compensation module collects the error data, the environmental data, and the expansion compensation values to obtain precision parameters and compensation parameters, and transmits the precision parameters and the compensation parameters to the numerical control system through the communication module.

There is provided a thermal displacement correction apparatus for a machine tool which automatically determines necessity/unnecessity of actual measurement of the machine tool, the apparatus including: a thermal displacement correction unit that predicts a thermal displacement amount from an operation of a machine or a temperature of each portion of the machine and calculates a thermal displacement correction amount for correcting thermal displacement by adding, to a position command value of a feed axis, the thermal displacement correction amount for cancelling the thermal displacement amount thus predicted; and a thermal displacement correction amount adjustment unit that calculates an adjustment value for adjusting the thermal displacement correction amount on the basis of the thermal displacement correction amount, wherein a change amount E from the start of processing is obtained, E is compared with designated Em, and when EEm, actual measurement is performed with measurement means.

A machining tool thermal compensation system based on an aggregation model includes a calculating module and a processing module. The calculating module executes a first thermal compensation model and a second thermal compensation model. The first thermal compensation model is only related to motor temperature change and the second thermal compensation model is only related to environmental temperature change. The processing module executes an aggregation model based on Kalman filter. The calculating module inputs the motor temperature of a target machining tool at a time point into the first thermal compensation model to generate a first compensation value and inputs the environmental temperature of the target machining tool at this time point into the second thermal compensation model to generate a second compensation value. The processing module executes the aggregation model according to the two compensation values to generate a modified compensation value of this time point.

A method for controlling a temperature of a cooling device taking into account heating at least one machine component of a process machine during operation of the process machine is provided. The method includes ascertaining an expected thermal energy acting upon the at least one machine component within a temporal processing part of a control program that controls the operation of the process machine. The expected thermal energy is ascertained based a processing power provided within the temporal processing part for the at least one machine component. The method further includes determining a required heat dissipating capability of the cooling device for dissipating the expected thermal energy, and preconditioning the cooling device in advance in order to provide the required heat dissipating capability until the expected thermal energy acts upon the machine component.

A temperature control device includes a machine body temperature sensor which measures a machine body temperature at a portion separated from a spindle device, a return oil temperature sensor which measures a temperature of cooling oil which circulates in a machine tool and which is collected by the temperature control device, an oil controller which includes at least two oil control modules, each having a cooler and which control the temperature of the cooling oil so that the temperature of the cooling oil detected by the return temperature sensor is synchronized with a reference temperature set based on a machine body temperature, in which tanks thereof communicate with each other, and the at least two oil control modules are connected in parallel to the machine tool, and a piping connection manifold for uniformizing convergence of the cooling oil to the machine tool and branching to each of the oil control modules.

The present invention relates to an apparatus and to a method for compensation of errors of a numerically controlled machine tool, which has at least one controllable machine axis for relative positioning of at least one workpiece relative to one or more machining devices. The method comprises detecting actual measured values of at least one input variable describing a state of the machine tool by means of sensors on the machine tool, providing at least one compensation parameter to be utilized by a control device of the machine tool on the control device of the machine tool and compensating errors on the machine tool on the basis of the compensation parameter provided to the control device. The compensation comprises the compensation of thermal errors, the compensation of geometric errors and the compensation of errors on the basis of the dynamics of the machine.

A processing machine includes a drive source, a camera, an image processing device and a control device. The drive source makes a workpiece and a tool relatively move in a first direction. The camera captures the tool in the first direction to acquire an image. The image processing device identifies a position of the tool in the first direction based on clarity of the tool in the image. The control device controls the first drive source based on the position of the tool in the first direction identified by the image processing device.