Numerical controller
AssigneeFanuc Corporation
InventorYuuji Kishida
Life of this patent
Estimating the term…
Abstract
A numerical controller for controlling a machine tool having a parallel link mechanism specifies a commanded position and a commanded posture of a tool by analyzing a program command, corrects the commanded posture while maintaining the commanded position when a combination of the specified commanded position and commanded posture is not feasible, and outputs the commanded position and the corrected posture which has been corrected to the machine tool. In this way, machining in the unrealizable region is realised by the machine tool having the parallel link mechanism.
Claims4
A numerical controller for controlling a machine tool having a parallel link mechanism and also having two orthogonal rotating axes to work on a workpiece, in which the machine tool having the parallel link mechanism has a crossover offset based on mounting positions of the rotating axes, the numerical controller comprising:
- a command analysis unit for specifying a commanded position and a commanded posture of a tool by analyzing a program command;
- a correction command calculation unit for calculating a corrected posture obtained by correcting only the commanded posture while maintaining the commanded position when a combination of the commanded position and the commanded posture of the tool is not feasible due to presence of the crossover offset, wherein an axial direction of the tool is changed without changing a distal end point of the tool;
- and
- a command output unit for outputting the commanded position and the corrected posture to the machine tool, wherein the corrected posture comprises an angle of the tool with respect to the workpiece falling within a predetermined threshold value.
Dependencies are inferred from the claim text.