A control system constructed so that a machine tool and a high-order server configured to manage the machine tool are connected through a communication line determines the arrangement of a control process in the respective execution environments of the machine tool and the high-order server, based on an execution condition for the execution of the control process available in machining performed in the machine tool and machining information on the machining in the machine tool.

A servo motor control apparatus for controlling a servo motor includes a storage unit configured to store a torque constant predefined for the servo motor, a torque constant correction unit configured to correct the torque constant stored in the storage unit when magnetic saturation occurs in a winding of the servo motor, and an output calculation unit configured to calculate an output of the servo motor on the basis of the torque constant stored in the storage unit or the torque constant after correction calculated by the torque constant correction unit, a value associated with a current of the servo motor, and a value associated with a speed of the servo motor.

The invention provides a data interface device 2 for transmitting tool data to a control device 31a, 31b of a numerically controlled tool machine 3a, 3b, the data interface device 2 comprising a first interface module 21 configure for data transmission with a tool data management device 1, a second interface module 22 configured for data transmission with a control device 31a, 31b of a numerically controlled tool machine 3a, 3b, and a data processing unit 23, wherein the data interface device 2 is configured to receive tool data of a tool usable in numerically controlled machine tools 3a, 3b from the tool data management device 1 via the first interface module 21 and to transmit the tool data to the control device 31a, 31b of the machine tool 3a, 3b via the second interface module 22, wherein the second interface module 22 is connectable to a plurality of control devices 31a, 31b of numerically controlled machine tools, and the data processing unit 23 is configured to convert a data format of the tool data received via the first interface module 21 into a target data format readable by a respective control device 31a; 31b of the plurality of control devices 31a, 31b which receives the tool data, such that the machine tool 3a; 3b, associated with said respective control device 31a; 31b which receives the tool data, is controllable in dependence of the tool data received by the respective control device 31a; 31b.

A numerical controller performs analysis as to whether or not an input machining program is required to be read at high speed at the time of execution of the machining program, stores the machining program in any one of a storage unit which reads a program at high speed and a storage unit which reads a program at low speed in accordance with the analysis result, and updates information on a storage destination of the machining program. In this way, the storage destination of the input machining program can be automatically selected in accordance with the contents of the machining program.

A data storage device is used with a numerically controlled machine tool having a control device controlling machine tool actuators and sensors sending sensor signals indicating a machine state to the control device. The data storage apparatus includes: a first interface unit; a first storage medium storing configuration data indicating a group of machine tool sensors and read-out and processing rules for group sensor signals; a read-out unit reading out sensor signal values sent by the group specified in the configuration data via the first interface unit on the basis of specified read-out rules; a data processing unit processing the sensor signal values read out by the read-out unit into aggregated sensor system data on the basis of the processing rules specified in the configuration data; a second storage medium storing the sensor system data; and a second interface unit for data transmission to an external data processing unit.

A control system constructed so that a machine tool and a high-order server configured to manage the machine tool are connected through a communication line determines the arrangement of a control process in the respective execution environments of the machine tool and the high-order server, based on an execution condition for the execution of the control process available in machining performed in the machine tool and machining information on the machining in the machine tool.

A servo motor control apparatus for controlling a servo motor includes a storage unit configured to store a torque constant predefined for the servo motor, a torque constant correction unit configured to correct the torque constant stored in the storage unit when magnetic saturation occurs in a winding of the servo motor, and an output calculation unit configured to calculate an output of the servo motor on the basis of the torque constant stored in the storage unit or the torque constant after correction calculated by the torque constant correction unit, a value associated with a current of the servo motor, and a value associated with a speed of the servo motor.

A numerical control system, a machine tool having a numerical control system, and a data structure of a machining program, capable of automatically setting a plurality of tailstock settings corresponding to various machining processes, without increasing hardware resources on the numerical control apparatus side, are provided. A numerical control system 1 includes a numerical control apparatus 12 that controls driving of a machine tool 11 provided with a tailstock 10, and an external storage device 13. The external storage device 13 includes a machining program storage unit 14 that stores a machining program having a data structure including job data and setup data associated with a plurality of tailstock settings. The numerical control apparatus 12 includes a tailstock setting buffer 32, an active buffer region selection unit 43, and a tailstock setting writing unit 44.

A data interface device including a first interface module configured for data transmission with a tool data management device, a second interface module configured for data transmission with a control device of a numerically controlled tool machine, and a data processing unit. The data interface device is configured to receive tool data of a tool usable in numerically controlled machine tools from the tool data management device via the first interface module and to transmit the tool data to the control device of the machine tool via the second interface module. The second interface module is connectable to a plurality of control devices of numerically controlled machine tools, and the data processing unit is configured to convert a data format of the tool data received via the first interface module into a target data format readable by a respective control device which receives the tool data.