Patent ID: 7158857

Claim:
An alignment tool for aligning a cassette handler to a robot blade in a workpiece handling system wherein said cassette handler has a support surface for supporting a workpiece cassette having a plurality of slots for carrying workpieces, comprising: a frame adapted to be supported by said cassette handler support surface in a first orientation of said frame relative to said handler support surface, said frame having a reference surface and a first support surface positioned to engage said handler support surface and to support said reference surface a first predetermined distance from said handler support surface in said first orientation of said frame relative to said handler support surface; and a first distance sensor positioned to measure the distance of said reference surface from said sensor and to measure the distance of a workpiece from said sensor wherein said frame is adapted to be supported by said cassette handler support surface in a second orientation of said frame relative to said handler support surface, said frame having a second support surface positioned to engage said handler support surface and to support said reference surface a second predetermined distance from said handler support surface in said second orientation of said frame relative to said handler support surface.