Determining a cut pattern of a lathe method, control device, and lathe

A control device for numerically controlling a lathe, the lathe comprising a tool with a cutter acting on a workpiece, the workpiece having a start contour and a target contour to be achieved by cutting the workpiece according to a cut pattern,

• wherein the control device is arranged and configured to determine the cut pattern of the lathe by the following:
• determine a path of a n-th layer of the cut pattern, the n-th layer comprising:
• for n≥2:
• an infeed path which is linear and/or parallel to the target contour starting at point E_n−1 and ending at point S_n;
• a circular infeed path starting tangent to the target contour at the point S_n with a radius rS_n and ending at point IS_n;
• an intermediate path which is linear and/or parallel to the target contour starting at the point IS_n and ending at point IE_n;
• a circular outfeed path starting at the point IE_n and ending tangent to the target contour at point E_n with a radius rE_n;
• and
• for n≥2:
• a smoothing path which is linear and/or parallel to the target contour starting at the point E_n, including point S_n−1, and ending at the point E_n.

A lathe comprising:

• a tool with a cutter acting on a workpiece;
• and
• a control device for numerically controlling the lathe,
• wherein the workpiece has a start contour and a target contour to be achieved by cutting the workpiece according to a cut pattern, and
• wherein the control device is arranged and configured to determine the cut pattern of the lathe by determining a path of a n-th layer of the cut pattern, the n-th layer comprising:
• for n≥2:
• an infeed path which is linear and/or parallel to a target contour starting at point E_n−1 and ending at point S_n;
• a circular infeed path starting tangent to the target contour at the point S_n with a radius rS_n and ending at point IS_n;
• an intermediate path which is linear and/or parallel to the target contour starting at the point IS_n and ending at point IE_n;
• a circular outfeed path starting at the point IE_n and ending tangent to the target contour at point E_n with a radius rE_n;
• and
• for n≥2:
• a smoothing path which is linear and/or parallel to the target contour starting at the point E_n, including point S_n−1, and ending at the point E_n.