AVR200 and AVR300 User Guide
51 6106 Revision D
6. While observing the feature, slowly adjust the magnification lower. Verify that the feature
remains at the center of the crosshair as the magnification is lowered.
7. Report any observed discrepancy. If the error is verified, contact your Starrett
representative for authorized service.
8.3.3 Zoom
Optics
Squareness
Definition
Squareness refers to the alignment of the camera relative to the motion of the metrology
stage. If the camera is misaligned (out of square), the image will drift diagonally across the
screen as the stage is moved along the other axis.
Procedure
To check squareness, perform the following steps:
1. Place the magnification (Mag) checker or other suitable inspection part on the stage and
secure properly.
2. Select the crosshair image tool in software and verify that it is at its defined center
position. Refer to the
MetLogix M3 Video and FOV Inspection Software User’s Guide
for detailed information.
3. At low magnification, select a point-like feature such as a corner or the standard’s X-Y
origin. Using the stage, position it to the center of the crosshair.
4. Zoom to high magnification, then refocus and recenter the point as needed.
5. While observing the feature, slowly move the stage X axis
only
. (Do not move the stage
Y axis.) Verify that the point remains aligned on the X axis of the crosshair as the feature
is moved to the left and right within the field of view.
6. Report any observed discrepancy. If the error is verified, contact your Starrett
representative for authorized service.
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