Numerical controller and movement control method for tool

A movement control method for a tool wherein a numerical controller moves the tool based on a program, the tool being configured to machine a work supported on a table and being movable along at least two axis directions orthogonal to each other, the movement control method comprising:

• a program analyzing step of analyzing the program to obtain an end point position of the tool for a linear cutting feed;
• a first angle calculating step of calculating an inclination angle of a synthetic feeding direction that maximizes a synthetic torque, based on a predetermined upper limit movement torque of the tool in each of the at least two axis directions;
• a second angle calculating step of calculating an inclination angle of a cutting feed direction of the tool, based on a start point position and the end point position of the tool;
• a rotation angle calculating step of calculating a difference between the inclination angle of the synthetic feeding direction and the inclination angle of the cutting feed direction as a rotation angle of the table;
• and
• a rotation controlling step of controlling rotation of the table about a rotation center position of the table, based on the rotation angle.