| http://www.w3.org/ns/prov#value | - A method for calibrating a CNC apparatus for controlling a machine tool, the CNC apparatus having a memory configured to compensate for offsets in a pivot point; the machine tool having a head, a pivot point, a spindle, a table, and at least four axes including an X-axis, a Y-axis, a Z-axis, and a C-axis, said method comprising:
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