Laser target assembly for sheaves and height gages

摘要

A target assembly is provided for use with a laser alignment system. The target assembly includes three light-sensitive target cells arranged to define corners of a triangle. The light-sensitive target cells are mounted to a support plate such that the three light-sensitive target cells face substantially in the same direction, and such that one axis of each light-sensitive target cell is substantially parallel to the plane of the support plate. The support plate may further include mounting structures for mounting the target assembly to an object that must be checked or aligned. Differences between readings can be used to check misalignment about two perpendicular axes, and averages of the respective readings can be used to check position or displacement. The laser alignment system can be employed to align the parallel rotational axes of a driven and driving sheave of an industrial machine. By mounting the target assembly to the grooves of a sheave, the alignment system can achieve true groove-to-groove alignment.