{TAIL ~ An alignment tool}, method and system are provided for aligning a cassette handler to a robot blade in a workpiece handling system, in which the tool comprises a frame or fixture adapted to be supported by the cassette handler support surface, in which the frame has one or more distance sensors positioned to measure the distance of a workpiece or robot blade from the sensor or a predetermined reference point or {HEAD ~ surface} 
{ TAIL ~ An alignment tool } , method and system are provided for aligning a cassette handler to a robot blade in a workpiece handling system , in which the tool comprises a frame or fixture adapted to be supported by the cassette handler support surface , in which the frame has one or more distance sensors positioned to measure the distance of a workpiece or robot blade from the sensor or a predetermined reference point or { HEAD ~ surface }
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