A numerical value controller includes: a storage unit storing a machining program involving executing canned cycles including a first operation for moving a tool to a return point, a second operation for positioning a drilling position of a workpiece relative to the tool, a third operation for moving the tool from the return point to a hole bottom point, and a fourth operation for moving the tool from the hole bottom point to a terminal point located toward the hole bottom point relative to the return point; a control unit controls relative movement between the tool and the workpiece based on the machining program and moves the tool along curved paths by starting the second operation before the first operation ends and by starting the third operation before the second operation ends; and a distance calculating unit calculates a retraction distance from the workpiece to the return point.

An apparatus for correcting a process error includes: a frame; a machining unit formed inside or outside the frame with respect to the frame and performing a predetermined process; a conveying unit formed inside or outside the frame with respect to the frame and performing predetermined conveying; a sensing mark formed on the frame, the machining unit, or the conveying unit; an imaging unit formed inside or outside the frame and creating an original image by imaging the sensing mark; and a measuring unit deriving a 3D position variation value of the frame, the machining unit, or the conveying unit by deriving an image variation value of the sensing mark by analyzing the original image transmitted from the imaging unit imaging the sensing mark formed on the frame, the machining unit, or the conveying unit.

An apparatus for correcting a process error includes: a frame; a machining unit formed inside or outside the frame with respect to the frame and performing a predetermined process; a conveying unit formed inside or outside the frame with respect to the frame and performing predetermined conveying; a sensing mark formed on the frame, the machining unit, or the conveying unit; an imaging unit formed inside or outside the frame and creating an original image by imaging the sensing mark; and a measuring unit deriving a 3D position variation value of the frame, the machining unit, or the conveying unit by deriving an image variation value of the sensing mark by analyzing the original image transmitted from the imaging unit imaging the sensing mark formed on the frame, the machining unit, or the conveying unit.

A tandem control system for a machine tool, according to the present invention, comprises: a numerical control unit; a main operation unit; a PLC which executes a control command via communication with the numerical control unit or the main operation unit; a servo drive which includes a notch filter unit and executes the control command from the PLC; a servo motor unit which is driven under the control of the servo drive; and a power conversion unit which is electrically connected to the servo motor unit and the servo drive so as to apply current to the servo motor unit, wherein the servo drive suppresses resonance due to the operation of the servo motor unit by controlling the application state of current transferred to the power conversion unit according to changes of notch &; filter coefficients calculated in real time at the notch filter unit.

A tandem control system for a machine tool, according to the present invention, comprises: a numerical control unit; a main operation unit; a PLC which executes a control command via communication with the numerical control unit or the main operation unit; a servo drive which includes a notch filter unit and executes the control command from the PLC; a servo motor unit which is driven under the control of the servo drive; and a power conversion unit which is electrically connected to the servo motor unit and the servo drive so as to apply current to the servo motor unit, wherein the servo drive suppresses resonance due to the operation of the servo motor unit by controlling the application state of current transferred to the power conversion unit according to changes of notch &; filter coefficients calculated in real time at the notch filter unit.

A machining center NC operation panel with a body temperature management function that makes a physical condition determination in accordance with body temperature measurement of an operator, can restrict the start of work at time of a determination that the physical condition is inappropriate, and also is capable of body temperature management of a worker and the like at all times, includes a visible region image camera and an infrared ray detection camera respectively with a visible light condensing lens, and an infrared ray condensing lens being mounted exposed on the front face of the operation panel. The machining center NC operation panel has a storage unit having an operator list created for each operator pre-registered as a machine tool user, a facial image file, and a body temperature management file storing body temperature databases of machine tool users and body temperature databases of body temperature management users. A control unit includes: a facial authentication processing unit that compares facial image data of an operator obtained from the visible region image camera with a facial image data group in the facial image file, searches for a relevant person, and identifies the operator; a work information processing unit that calls a work information allocated to the identified operator from the operator list, and, on the basis of the work information, causes a display section of the operation panel to display allowed work items of the operator such that the allowed work items can be selected and executed; and a body temperature acquisition processing unit that acquires a body temperature measurement value of the operator from face surface temperature data obtained by the infrared ray detection camera, causes the display section to display the body temperature measurement value, also assesses whether or not the operator has a fever on the basis of the body temperature measurement value, outputs a signal representing the result of the assessment to the work information processing unit, and simultaneously causes the display section to display an assessment screen. The work information processing unit has a function by which upon receiving a signal representing an assessment that the operator who is a machine tool user is in a fever condition from the body temperature acquisition processing unit in the work management mode, the display section is caused to lock an operation screen, and prohibit continuation of operation of the start of work.

A machining center NC operation panel with a body temperature management function that makes a physical condition determination in accordance with body temperature measurement of an operator, can restrict the start of work at time of a determination that the physical condition is inappropriate, and also is capable of body temperature management of a worker and the like at all times, includes a visible region image camera and an infrared ray detection camera respectively with a visible light condensing lens, and an infrared ray condensing lens being mounted exposed on the front face of the operation panel. The machining center NC operation panel has a storage unit having an operator list created for each operator pre-registered as a machine tool user, a facial image file, and a body temperature management file storing body temperature databases of machine tool users and body temperature databases of body temperature management users. A control unit includes: a facial authentication processing unit that compares facial image data of an operator obtained from the visible region image camera with a facial image data group in the facial image file, searches for a relevant person, and identifies the operator; a work information processing unit that calls a work information allocated to the identified operator from the operator list, and, on the basis of the work information, causes a display section of the operation panel to display allowed work items of the operator such that the allowed work items can be selected and executed; and a body temperature acquisition processing unit that acquires a body temperature measurement value of the operator from face surface temperature data obtained by the infrared ray detection camera, causes the display section to display the body temperature measurement value, also assesses whether or not the operator has a fever on the basis of the body temperature measurement value, outputs a signal representing the result of the assessment to the work information processing unit, and simultaneously causes the display section to display an assessment screen. The work information processing unit has a function by which upon receiving a signal representing an assessment that the operator who is a machine tool user is in a fever condition from the body temperature acquisition processing unit in the work management mode, the display section is caused to lock an operation screen, and prohibit continuation of operation of the start of work.

A motor control device includes an acceleration detecting section configured to detect an acceleration of a control object, and an acceleration control section configured to control an acceleration of a motor driving the control object based on the detected acceleration, in which the acceleration control section includes a vibration component extraction filter configured to extract a vibration component generated between the motor and the control object, and the vibration component extraction filter changes a filter characteristic frequency according to at least one of a position and a mass of the control object.

An error identification method for identifying an error includes: securing a calibrator having three or more spheres on the table; measuring an initial position of the calibrator with a position measurement sensor tool; calculating a reference angle of each of the rotation axes for positioning the calibrator to a predetermined reference position using a measured value in the measuring; indexing each of the rotation axes individually to a plurality of indexed angles with respect to the reference angle and measuring a center position of a sphere of the calibrator secured on the table at each of the indexed angles with the position measurement sensor tool; and identifying a positioning error and a straightness error of the linear axis, a squareness error between the respective linear axes, and a position error and an inclination error of each of the rotation axes based on a measured value in the indexing.

An error identification method for identifying an error includes: securing a calibrator having three or more spheres on the table; measuring an initial position of the calibrator with a position measurement sensor tool; calculating a reference angle of each of the rotation axes for positioning the calibrator to a predetermined reference position using a measured value in the measuring; indexing each of the rotation axes individually to a plurality of indexed angles with respect to the reference angle and measuring a center position of a sphere of the calibrator secured on the table at each of the indexed angles with the position measurement sensor tool; and identifying a positioning error and a straightness error of the linear axis, a squareness error between the respective linear axes, and a position error and an inclination error of each of the rotation axes based on a measured value in the indexing.