Machining device and correction value determination method

A machining device placed in a space of an XYZ rectangular coordinate system capable of positioning a plurality of components of the machining device using a detection tool, and determining a correction value for a coordinate value of a measurement point that is pre-set for the positioning, the machining device comprising:

• a clamp that is capable of selectively clamping one of a machining tool and a detection tool;
• a spindle provided on the clamp and extending in a Z-axis direction;
• a support that is capable of selectively supporting one of a workpiece and a correction jig;
• a conveyor that is capable of moving the clamp in three-dimensional directions relative to the support;
• and
• a controller;
• wherein
• an X reference point located at an end in an X-axis direction and a Y reference point located at an end in a Y-axis direction are pre-set on a surface of either one of the correction jig and the support;
• and
• the controller includes:
• a storage to store a design length of the detection tool;
• an X correction value determiner to determines an X correction value, which is the correction value for the X-axis direction, based on an X coordinate value obtained when the detection tool clamped by the clamp is brought into contact with the X reference point;
• a Y correction value determiner to determine a Y correction value, which is the correction value for the Y-axis direction, based on a Y coordinate value obtained when the detection tool clamped by the clamp is brought into contact with the Y reference point;
• an actual length determiner to determine an actual length in the Z-axis direction of the detection tool clamped by the clamp by measuring the actual length of the detection tool;
• and
• a Z correction value determiner to determine a Z correction value, which is the correction value for the Z-axis direction, based on the X correction value, the Y correction value, the actual length of the detection tool and the design length of the detection tool.