Numerical controller having speed control function for multi-axis machining device

摘要

When a numerical controller executes a tool-center-point control in which a path of a tool center point with respect to a workpiece is instructed, and the workpiece is machined along the instructed path based on a speed instruction, the numerical controller sets the speed instruction so that the speed instruction is a synthesis speed with respect to a synthesis distance of a relative moving distance between the workpiece and a tool center point and a tool-direction changing distance due to a relative change in a tool direction with respect to the workpiece by a rotary axis. The numerical controller interpolates a position of a linear axis and a position of a rotary axis by the tool-center-point control according to the synthesis speed and drives the linear axis and the rotary axis to the position of the linear axis and the position of the rotary axis created by the interpolation.

主权项

1. A numerical controller for controlling a multi-axis machining device which machines a workpiece mounted on a table by using at least three linear axes and at least one rotary axis while changing a relative direction of a tool with respect to the workpiece,
wherein said numerical controller, for executing a tool-center-point control in which a path of a tool center point with respect to the workpiece is instructed so as to move and machine the workpiece along the instructed path of the tool center point based on a speed instruction, comprises: a synthesis speed control unit that sets said speed instruction so that said speed instruction is a synthesis speed with respect to a synthesis distance of a relative moving distance between the workpiece and a tool center point and a tool-direction changing distance due to a relative change in a tool direction with respect to the workpiece by the rotary axis; and an interpolation unit that interpolates positions of the linear axes and a position of the rotary axis by the tool-center-point control based on the speed instruction according to the synthesis speed, wherein the linear axes and the rotary axis are driven to the positions of the linear axes and the position of the rotary axis created by the interpolation unit.