AVR200 and AVR300 User Guide
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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