How does the High Speed Shear Test Procedure differ from normal shear test?

High speed testing takes place at speeds up to 5000x faster than normal shear testing.  In order to achieve these speeds, a slightly different set up is needed from conventional shear testing.  Essentially, the sample must be accelerated towards the shear tool for the test and decelerated following the test.  Therefore the area approaching and following the test ball must be cleared.  See question 4 above.
The sequence of events during the test is shown diagrammatically below.

The tool is aligned to the solder ball in the normal manner and the test is initiated.  A normal landing and step-back (to the pre—programmed shear height) will be completed.  The sample then moves away to a distance calculated by the software.  From this position the sample then accelerates to the constant test velocity and the test takes place.  Following the test, the work holder decelerates to a halt.