Abstract: A file management device is a file management device that is connected to a plurality of manufacturing machines or a plurality of robots through a communication network and includes: an input unit to which a user inputs a file deletion command including a file name of files to be deleted; and a file deletion unit that causes the plurality of manufacturing machines or the plurality of robots to delete the files to be deleted with the same file name stored in the plurality of manufacturing machines or the plurality of robots in response to the file deletion command input through the input unit.

Abstract: Provided is a monitoring device and a monitoring method that can capture the condition of a coolant in detail. A monitoring device according to one embodiment includes: a first detection unit that detects a first physical quantity; a second detection unit that detects a second physical quantity; a ratio calculation unit that calculates the ratio between a first value obtained when the first physical quantity is expressed using a specified unit, and a second value obtained when the second physical quantity is expressed using a specified unit; and an inferring unit that, if the calculated ratio is above an upper limit value of a management range or below a lower limit value of the management range, infers that one among an oil and an electrolyte contained in the coolant is abnormal.

Abstract: A control system includes a power inverter configured to convert direct current (DC) power into alternating current (AC) power, an electric motor configured to be driven using the AC power output by the power inverter, and a controller configured to control the AC power by performing switching between multi-pulse control and one-pulse control on the basis of electric power loss of the electric motor and the power inverter and noise of the electric motor, the controller being a control device configured to control the power inverter.

Abstract: A file management device is a file management device that is connected to a plurality of manufacturing machines or a plurality of robots through a communication network and includes: an input unit to which a user inputs a file deletion command including a file name of files to be deleted; and a file deletion unit that causes the plurality of manufacturing machines or the plurality of robots to delete the files to be deleted with the same file name stored in the plurality of manufacturing machines or the plurality of robots in response to the file deletion command input through the input unit.

Abstract: A control system includes a power inverter configured to convert direct current (DC) power into alternating current (AC) power, an electric motor configured to be driven using the AC power output by the power inverter, and a controller configured to control the AC power by performing switching between multi-pulse control and one-pulse control on the basis of electric power loss of the electric motor and the power inverter and noise of the electric motor, the controller being a control device configured to control the power inverter.

Abstract: A warm up operation planning device that generates a warm up operation plan for a machine tool comprises: a warm up operation program memory in which at least one warm up operation program is stored; a machining plan input unit that inputs a machining plan for a work in a predetermined period; a warm up operation program selection unit that selects the warm up operation program responsive to the state of the machine tool; a warm up operation duration determination unit that determines a warm up operation duration in response to the work; and a warm up operation planning unit that calculates start time and finish time of warm up operation based on the machining plan. The warm up operation program selection unit selects the warm up operation program responsive to the work from the warm up operation program memory.

Abstract: A controller for controlling a machine includes a coolant monitoring function. The controller generates and records history information in which the measurement values of a state of a coolant are associated with time information on the time when the measurement values are measured. Then, a rate of change in a measurement value for a state of the coolant is calculated based on the recorded history information, and a state of the coolant and a countermeasure therefore are determined based on the calculated rate of change in the measurement value.

Abstract: A thermal displacement correction device for a machine tool that corrects thermal displacement of a spindle unit includes a memory that defines the spindle unit as a two-dimensional model in a thermally symmetrical plane or in a plane parallel to the thermally symmetrical plane, divides the two-dimensional model into regions, and stores a linear expansion coefficient, a heating coefficient and a radiation coefficient corresponding to each region, and a thermal conductivity coefficient between the each region and its adjacent region; a temperature estimating unit that estimates a temperature of the each region; a correction estimating unit; and a thermal displacement correction unit that performs correction in driving a feed shaft to a command position.

Abstract: When machining a workpiece by a machine tool by cutting, a cutting fluid is sprayed to a workpiece machining region. Above a surface of the cutting fluid in a cutting fluid tank, an odor sensor for detecting the odor emitted by the cutting fluid is disposed in the space defined the surface of the cutting fluid in the cutting fluid tank and a cover. Based on the odor detected by the odor sensor, deterioration of the cutting fluid is determined.

Abstract: A warm up operation planning device that generates a warm up operation plan for a machine tool comprises: a warm up operation program memory in which at least one warm up operation program is stored; a machining plan input unit that inputs a machining plan for a work in a predetermined period; a warm up operation program selection unit that selects the warm up operation program responsive to the state of the machine tool; a warm up operation duration determination unit that determines a warm up operation duration in response to the work; and a warm up operation planning unit that calculates start time and finish time of warm up operation based on the machining plan. The warm up operation program selection unit selects the warm up operation program responsive to the work from the warm up operation program memory.

Abstract: When a machining system that includes a machine tool and a robot detects that an operator is present in a dangerous area in the system, a robot controller that controls the robot determines an operation restriction on the machine tool and notifies a numerical controller that controls the machine tool of the determined operation restriction. The numerical controller restricts the operation of the machine tool in accordance with the notified operation restriction.

Abstract: A controller for controlling a machine includes a coolant monitoring function. The controller generates and records history information in which the measurement values of a state of a coolant are associated with time information on the time when the measurement values are measured. Then, a rate of change in a measurement value for a state of the coolant is calculated based on the recorded history information, and a state of the coolant and a countermeasure therefore are determined based on the calculated rate of change in the measurement value.

Abstract: A position command value is compensated by predicting a thermal displacement amount of each part of a machine tool and adding a thermal displacement compensation amount which cancels the predicted thermal displacement amount to the position command value of a feed axis. This thermal displacement compensation amount is adjusted from the error amount between this compensated position command value and an actual machining point. Upon adjustment of this thermal displacement compensation amount, it is possible to determine whether to increase or decrease the thermal displacement amount based on a direction in which an operator moves a tool image or a workpiece image on a screen.

Abstract: When a machining system that includes a machine tool and a robot detects that an operator is present in a dangerous area in the system, a robot controller that controls the robot determines an operation restriction on the machine tool and notifies a numerical controller that controls the machine tool of the determined operation restriction. The numerical controller restricts the operation of the machine tool in accordance with the notified operation restriction.

Abstract: When machining a workpiece by a machine tool by cutting, a cutting fluid is sprayed to a workpiece machining region. Above a surface of the cutting fluid in a cutting fluid tank, an odor sensor for detecting the odor emitted by the cutting fluid is disposed in the space defined the surface of the cutting fluid in the cutting fluid tank and a cover. Based on the odor detected by the odor sensor, deterioration of the cutting fluid is determined.

Abstract: A thermal displacement correction device for a machine tool that corrects thermal displacement of a spindle unit includes a memory that defines the spindle unit as a two-dimensional model in a thermally symmetrical plane or in a plane parallel to the thermally symmetrical plane, divides the two-dimensional model into regions, and stores a linear expansion coefficient, a heating coefficient and a radiation coefficient corresponding to each region, and a thermal conductivity coefficient between the each region and its adjacent region; a temperature estimating unit that estimates a temperature of the each region; a correction estimating unit; and a thermal displacement correction unit that performs correction in driving a feed shaft to a command position.

Abstract: In a thermal displacement compensation method for a machine tool, in which a feed shaft thermal displacement amount is obtained and an amount which cancels the obtained feed shaft thermal displacement amount is added as a thermal displacement compensation amount to a position command for a feed axis, a position where a signal is first output by a position sensor for detecting the position of a movable part of the machine tool is first stored as an initial position. Then, the position where the signal is output by the position sensor is detected, and the thermal displacement compensation amount is modified according to a compensation error, which is the difference between the detected position (actual position) and the initial position.

Abstract: A position command value is compensated by predicting a thermal displacement amount of each part of a machine tool and adding a thermal displacement compensation amount which cancels the predicted thermal displacement amount to the position command value of a feed axis. This thermal displacement compensation amount is adjusted from the error amount between this compensated position command value and an actual machining point. Upon adjustment of this thermal displacement compensation amount, it is possible to determine whether to increase or decrease the thermal displacement amount based on a direction in which an operator moves a tool image or a workpiece image on a screen.

Abstract: In a thermal displacement compensation method for a machine tool, in which a feed shaft thermal displacement amount is obtained and an amount which cancels the obtained feed shaft thermal displacement amount is added as a thermal displacement compensation amount to a position command for a feed axis, a position where a signal is first output by a position sensor for detecting the position of a movable part of the machine tool is first stored as an initial position. Then, the position where the signal is output by the position sensor is detected, and the thermal displacement compensation amount is modified according to a compensation error, which is the difference between the detected position (actual position) and the initial position.