The present invention relates to a method for machining a blank (10) by means of a tool (12) for producing a finished part, wherein the tool (12) is moved during the machining on a guide path (14) comprising at least three successive path segments (16, 18, 20; 16-1, 18-1, 20-1; 16-2, 18-2, 20-2; 18) in the form of two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2) and one connecting segment (18; 18-1; 18-2; 18), which connects the two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2) to one another, and wherein the connecting segment (18; 18-1; 18-2; 18) of the path segments (16, 18, 20; 16-1, 18-1, 20-1; 16-2, 18-2, 20-2; 18), which connecting segment connects the two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2), is determined in terms of its shape by the forward feed (F1) of the tool (12) at the end (24) of the first machining segment (16) and by the forward feed (F2) of the tool (12) at the start (30) of the second machining segment (20).

In restarting automatic operation after a machining program or machining conditions are changed or manual intervention is performed while the automatic operation is suspended, a machining path based on simulated operation is drawn to check the change for correctness. A drawing path of an unmachined part is reconstructed by, for example, recalculating a check drawing path at or behind a program stop position, and the reconstructed drawing path is redrawn.

A numerical controller acquires state data including information indicating a machining state and information indicating a selected menu item, creates a machine learning model for determining a menu item display order in menu display based on the state data, and determines a menu item display order in the menu display based on the created machine learning model and the state data.

Provided is an assistance device with which it is possible to discover optimal processing conditions more easily. An assistance device comprising: a program management unit that associates a plurality of verification results, in which a processing condition is verified using a verification function, with a processing program and stores the verification results in a verification result storage unit; an assessment unit that assesses whether each verification result satisfies a shape target value for a workpiece; and an advice unit that, when any of the verification results do not satisfy the shape target value for the workpiece, presents a modification of a processing condition on the basis of processing-condition-related information relating to the processing condition for the workpiece, the verification result, and the verification function.