A machining system includes: a jig retaining a plurality of workpieces; a measurement device measuring the retained plurality of workpieces; and a machining device machining the retained plurality of workpieces. The jig has a reference part positioned or position detected by the machining device. The measurement device has: a measurement unit measuring a positional relationship of the retained plurality of workpieces relative to the reference part, and an input unit using a recording medium or communication to input measured positional information of the plurality of workpieces to the machining device. The machining device has: a jig coordinate system specifying unit specifying a coordinate system of the jig, by positioning or position measuring the reference part, and a workpiece coordinate system setting unit individually setting coordinate systems of each of the plurality of workpieces, based on the specified coordinate system, and the inputted positional information.

A machining system according to an aspect of the present disclosure includes: a jig which retains a plurality of workpieces; a measurement device which measures a plurality of workpieces retained on the jig; and a machining device which machines the plurality of workpieces retained on the jig, in which the jig has a reference part which is positioned or position detected by the machining device, and in which the measurement device has: a measurement unit which measures a positional relationship of the plurality of workpieces retained on the jig relative to the reference part, and an input unit which uses a recording medium or communication to input positional information of the plurality of workpieces measured by the measurement unit to the machining device, and in which the machining device has: a jig coordinate system specifying unit which specifies a coordinate system of the jig, by positioning or position measuring the reference part of the jig, and a workpiece coordinate system setting unit which individually sets coordinate systems of each of the plurality of workpieces, based on a coordinate system of the jig specified by the jig coordinate system specifying unit, and the positional information inputted from the input unit.

An arc processing method is provided. Firstly, a machining program code is provided, wherein the machining program code includes a control code for machining an arc having a start point and an end point. Then, the machining program code is analyzed to obtain a first start point vector and a first end point vector, both defined by a first coordinate system, of a tool. Then, the first start point vector is converted to a second start point vector defined by a second coordinate system. Then, the first end point vector is converted to a second end point vector defined by the second coordinate system. Then, a plurality of first interpolation vectors of interpolation points, defined by the second coordinate system and interposed between the second start point vector and the second end point vector, are obtained. Then, all the first interpolation vectors are converted into corresponding second interpolation vectors.

A position compensation system of a tool changer includes a storage unit for storing a coordinate indicating a reference position of a turret, a rotary position coordinate detector for detecting the rotary position coordinate of the turret, a compensation necessity determiner for determining whether or not it is necessary to perform a rotational compensation to return the turret to the reference position, in accordance with a rotational deviation of the detected rotary position coordinate from the stored rotary position coordinate, and a compensation request part for requesting an operation or work related to the rotational compensation when it is determined that the rotational compensation needs to be performed.

A position compensation system of a tool changer includes a storage unit for storing a coordinate indicating a reference position of a turret, a rotary position coordinate detector for detecting the rotary position coordinate of the turret, a compensation necessity determiner for determining whether or not it is necessary to perform a rotational compensation to return the turret to the reference position, in accordance with a rotational deviation of the detected rotary position coordinate from the stored rotary position coordinate, and a compensation request part for requesting an operation or work related to the rotational compensation when it is determined that the rotational compensation needs to be performed.

The present invention addresses the problem of avoiding uncut portions of a workpiece and interference between a workpiece and a tool attributed to an incorrect movement direction or movement amount of the rotational axis, without changing a program. The numerical control device according to the present invention is a numerical control device for a machine tool that implements machining while changing the relative position and relative orientation between a tool and a workpiece on the basis of a program, the numerical control device comprising: a contour shape generation unit that generates contour shape information pertaining to the contour shape of the workpiece on the basis of relative movement information between the tool and the workpiece described in the program; a relative orientation determination unit that determines a relative orientation of the tool in relation to the workpiece at a change point included in the contour shape information; and a relative orientation change direction determination unit that determines, according to the type of the contour shape, a change direction for the relative orientation in order to obtain the determined relative orientation.