Numerical control device

A numerical control device which numerically controls a machine tool having a linear axis and a rotary axis, the numerical control device comprising:

• a linear axis dependent position correction amount calculating unit which calculates a position correction amount of the linear axis from a translation error and an attitude error that are dependent on movement of the linear axis;
• a rotary axis angle correction amount calculating unit which calculates an angle correction amount of the rotary axis from a part of the attitude error that is dependent on movement of the linear axis;
• and
• a position addition correction amount calculating unit which calculates a position correction amount of the linear axis corresponding to the angle correction amount of the rotary axis.

A numerical control device which numerically controls a machine tool having a linear axis and a rotary axis, the numerical control device comprising:

• a linear axis dependent position correction amount calculating unit which calculates a position correction amount of the linear axis from a translation error and an attitude error that are dependent on movement of the linear axis;
• a rotary axis dependent position correction amount calculating unit which calculates a position correction amount of the linear axis from a translation error and an attitude error that are dependent on movement of the rotary axis;
• a rotary axis angle correction amount calculating unit which calculates an angle correction amount of the rotary axis from a part of the attitude error that is dependent on movement of the linear axis and a part of the attitude error that is dependent on movement of the rotary axis;
• and
• a position addition correction amount calculating unit which calculates a position correction amount of the linear axis corresponding to the angle correction amount of the rotary axis.