While range of motion test was being run (Range_Motion_Adjustable_HAM_HEPI.m) on HAM6, a large step was seen.  22000 counts were going out the OutFilters.  See attached for the local sensor trends.  I've applied the calibration of 655counts/0.001" to display mils.
The step occurred near the beginning of the test while pushing with individual Actuators.  Note that the signs of the horizontal steps are all positive!  This means:

* The Crossbeam to Support Tubes clamps have slipped out, or
* the Crossbeam has been bent outward, but,
the West side Vertical shifted down early in the test and the East side also finished lower, so maybe:

* the Crossbeam rolled and it has a bend 

Dial indicators at the Support Tube Ends saw much greater shift down than the vertical IPS -- 19 to 25 mils!  Now I'm not the first one to run this test on a HEPI but this shift is enough to put a very careful alignment out of whack.

Yeah so I don't know, any thoughts?