A method and system compensates for vertical deflection for parts
manufactured by a numerically controlled (NC) machine. The (NC) machine
has an application head position programmed to a plurality of nominal tool
coordinates. Each nominal tool coordinate has a horizontal coordinate, a
rotational coordinate, and a vertical coordinate. A tool used to
manufacture the part is placed on the NC machine. The tool has a plurality
of actual tool coordinates, each actual tool coordinate has a horizontal
component, a rotational component, and a vertical sag component. A
difference between each vertical sag component and a corresponding one of
the nominal tool coordinates is calculated. Each difference is multiplied
by a multiplier value providing an adjusted sag value. Each adjusted sag
value is subtracted from the application head position for each actual
tool horizontal or rotational coordinate to compensate the part for the
vertical sag of the tool during manufacture.
