Method of plotting loaded conditions

Abstract

A loaded condition plotting method capable of simultaneously and promptly recognizing a motor loaded current value and a point being machined with accuracy is provided. During the cutting operation using a spindle motor controllable by a numeric control system executing a machining program, there is decided one region under which a spindle motor load current value periodically detected falls, among four regions consisting of a first region where the spindle motor load current value is less than 80% of the spindle motor rated current, a second region of 80% or more and less than 100%, a third region of 100% or more and less than 130%, and a fourth region of 130% or more. On a plotting image sections of the tool locus determined in accordance with the machining program appear with a workpiece configuration and a tool, the sections being correspondingly plotted in blue when the detected current value is within the first region, in green with the second region, in yellow with the third region, and in red with the fourth region.

Dependencies are inferred from the claim text.