been optically leveled, component or module offsets and straightness must be set. The illustration below depicts a typical optical tooling setup necessary to perform this work. Using... the established optical planes, precision optical scales are placed on machined surfaces to measure differences in straightness and alignment. Individual components or assemblies... are aligned straight and parallel relative to the machine centerline and baseline. Not all of the components may be identical in cross-machine width; therefore, the dimensional...

in the measurements indicate centerline misalignment. The ideal alignment condition is having the drive system's centerline straight and coincident in both the horizontal and vertical... planes.As you can see, optical alignment, as applied to drive systems, can compare centerline offsets and straightness within thousandths of an inch due to its measuring abilities.... Because optics provides a flat and straight plane over long distances, horizontal and vertical adjustments may be accomplished to minimize offset alignment and virtually eliminate...

offset centerline is referred to as a "baseline" and consists of non-corrosive monuments or "plugs" grouted in the floor. The baseline must be straight and parallel (perpendicular...

and jig transits to measure angular alignment, straightness and plumb conditions. Precision leveling scopes are used to measure level conditions. These instruments do not look...