Method for machine tool and profilometer coordinate registration

A method for registering machine tool and profilometer coordinates, said machine tool defining a C-axis having a zero position, said method comprising the steps of:

• loading a sacrificial workpiece into the machine tool;
• cutting several first features in a surface of the sacrificial workpiece and producing a linear machine tool motion across the workpiece;
• determining the centroid of each first cut feature;
• fitting a line to said centroids of said first cut features;
• and
• measuring angle θ0 of said line relative to the C-axis zero position.

A method for registering machine tool and profilometer coordinates, said machine tool defining a C-axis having a zero position, said method comprising the steps of:

• loading a sacrificial workpiece into the machine tool;
• moving the machine tool to a fixed radius;
• cutting several second features in a surface of the sacrificial workpiece and producing a circular machine tool motion across the workpiece;
• determining the centroid of each second cut feature;
• fitting a circle to said centroids of said second cut features;
• and
• determining a center of the circle, said center being the machine tool center in profilometer coordinates.