Numerical controller, machining route setting method, and non-transitory computer-readable medium recording a program

A machining route setting method implemented by a numerical controller that controls machining by a machine tool, comprising:

• a program acquisition step of acquiring a program for the machining;
• a mathematization step of expressing a machining route represented by discrete command points defined in the program for the machining as a continuous parametric line segment or curve on the basis of the program for the machining;
• a smoothing application range setting step of setting a range of smoothing for a target point of the smoothing along the parametric line segment or curve in a range from the target point;
• and
• a smoothing processing step of performing the smoothing on the target point on the basis of the set range of the smoothing, wherein
• the smoothing application range setting step sets the range of the smoothing as a range in which a deviation between before the smoothing and after the smoothing on the target point is a set threshold or less,
• wherein the smoothing is performed by the smoothing processing step along the machining route after the machining route has been expressed as the continuous parametric line segment or curve and a range of application of the smoothing is set by the smoothing application range setting step and is changed continuously between two or more adjacent machining routes,
• the machining route setting method further comprising an interpolation control step of controlling each servo axis of the machine tool based on the smoothened machining route.

A non-transitory computer readable recording medium recording a program for making a computer to realize:

• a program acquisition function of acquiring a program for machining by a machine tool;
• a mathematization function of expressing a machining route represented by discrete command points defined in the program for the machining as a continuous parametric line segment or curve on the basis of the program for the machining;
• a smoothing application range setting function of setting a range of smoothing for a target point of the smoothing along the parametric line segment or curve in a range from the target point;
• and
• a smoothing processing function of performing the smoothing on the target point on the basis of the set range of the smoothing, wherein
• the smoothing application range setting function sets the range of the smoothing as a range in which a deviation between before the smoothing and after the smoothing on the target point is a set threshold or less,
• wherein the smoothing is performed by the smoothing processing function along the machining route after the machining route has been expressed as the continuous parametric line segment or curve and a range of application of the smoothing is set by the smoothing application range setting function and is changed continuously between two or more adjacent machining routes,
• the program further makes the computer realize an interpolation control function of controlling each servo axis of the machine tool based on the smoothened machining route.