Numerical controller and movement control method for tool that maximizes movement torque in a cutting feed

A numerical controller that moves a tool based on a program stored in a storage medium of the numerical controller, the tool being configured to machine a work supported on a table having a rotation center position and being movable along at least two axis directions orthogonal to each other, the numerical controller comprising:

• a program analyzing processor configured to obtain, from the program, an end point position of the tool for a linear cutting feed;
• a first angle calculating processor configured to calculate an inclination angle of a synthetic feeding direction that maximizes a synthetic torque of the tool, based on a predetermined upper limit movement torque of the tool in each of the at least two axis directions;
• a second angle calculating processor configured to calculate 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 processor configured to calculate 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 control processor configured to control rotation of the table about the rotation center position of the table, based on the rotation angle so that the tool is able to perform a cutting feed at a maximum movement torque of the tool wherein the maximum movement torque is based on a predetermined upper limit movement torque of the tool in each of the at least two axis directions.