Chapter 3. Using Your ATS
3.8
Using the Target Overlay
A target overlay feature lets you verify that the ATS has correctly identified the target.
To activate the target overlay:
•
Check
Display target overlay
below the numeric readouts. The target overlay
appears as a circle with cross hairs, as shown in
Figure 3.6: Target Overlay
The target overlay should be centered on the image of the target, as shown in
target overlay changes from yellow to green when the target is centered in the sight ring to
within the specified tolerances and the Z target distance is within tolerance (see
Target Criteria,” on page 3.10
). After you instruct the ATS to find the target, if the overlay is
not centered on the target, the ATS is not correctly recognizing the target. If the target doesn't
overlay the feature in the image, check the following:
•
Video stopped.
Maker sure the wafer is still sending live video. You can do this by
moving the wafer a small amount and watching the video image. If the video isn’t
tracking the movement, turn off the wafer and then turn it back on.
•
Target too far off center.
The farther the target is initially from the center of the
field of view of the teaching wafer, the harder it is for ATS to find the target. Move
the teaching wafer so that the target appears closer to the sight ring and try finding
the target again. If you are having trouble seeing the target in the video image, you can
adjust the image by choosing the menu item
Settings > Optimize Lighting
.
Target
overlay
