Cognex In-Sight 1721, User Manual

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In-Sight
®
1700 Series Wafer Reader 1701 Wafer Reader Installation Options
Table E-1 shows examples of the 1701 wafer reader’s vertical working distances and the
corresponding horizontal working distances required if no focal adjustment is made.
Table E-1: Working Distances
VERTICAL WORKING DISTANCE
CORRESPONDING HORIZONTAL
WORKING DISTANCE
5mm N/A
10.0mm* N/A
15.0mm N/A
20.0mm N/A
25.0mm 1.1mm
30.0mm 6.1mm
40.0mm 16.1mm
50.0mm* 26.1mm
60.0mm 36.1mm
70.0mm 46.1mm
80.0mm 56.1mm
* Indicates factory-set working distances
Adjusting the Focus on the 1701
The recommended working distance range is 1 to 80.0mm for the 1701 wafer reader in
the vertical position. If using the horizontal mirror mount, the recommended working
distance range is 1 to 56.1mm.
Once the working distance is established, the focus can be adjusted using the focus
adjustment screw (M3 hex screw), located in the center of the 1701 wafer reader’s front
face-plate (see Figure E-3). To adjust the focus, use a 2.5mm Allen wrench. Turn the
focus adjustment screw clock-wise if the wafer reader is moved closer to the wafer; turn
the screw counter clock-wise if the wafer reader is moved farther away from the wafer.
Figure E-3: Location of Focus Adjustment Screw
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