Problem lampoly SNF 2009-08-23 22:27:46: Output cassette drive misalign

[bchui at snf.stanford.edu]

Output cassette drive doesn't align with the output arm.  The wafer 'trips' when it's being returned to the output cassette (the cassette rises before the output arm has a chance to let go of the wafer).  In fact, the sixth wafer out skips a slot, i.e. the cassette is probably rising too fast/too much.