MTS Series 609 Alignment Fixture - Manual (Page 66)

Series 609 Alignment Fixture Product Information 66
Adjust the Angular Alignment
Alignment Procedure
The following figure shows typical readings before and after an adjustment.
Thin Flat Specimens—Reduce the “C” Bend
Thin flat specimens with three gage levels, four gages per level, turn the
angularity adjustment screws to try to get equal readings from all four middle
level gages.
If the magnitude of the average of the A side’s middle gage readings change, you
are overadjusting the angularity screws.
For example, if your original A side middle gage average goes from +10.5 to -
10.5, you are overadjusting.
Adjust
Strain readings
s (typical readings before adjustment)
t (typical readings after adjustment)
Try for zero
readings
Upper
Middle
Lower
Upper
Middle
Lower
Close to zero
B side
A side