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4.2 Camera calibration
The camera must be aligned properly to the stage movement to ensure the precision of move-to-point
function. This guide will enable one to set up the camera to ensure smooth operation.
The camera is affixed with three set screws that must be loosened to adjust the rotation of the camera
(see
Figure 43 ). The camera can be roughly positioned using two white bars that should be touching, then
it will be fine-tuned by monitoring the motion of the stages.
Figure 43: Camera alignment.
Follow this procedure (Figure 44):
1. Adjust the camera to have the mount aligned as shown in the picture. Tighten up screws but not
strong, so that you can easily readjust them.
2. Place any type of well-plate and focus on a small object such as dust. You do not need to mount
the probe.
3. Press with the cursor on the small object and note the coordinate Y of the green cursor.
4. Move the stage in Y direction across the field of view so that you can still see the small object.
5. Press with the cursor on the small object and note the coordinate Y of the green cursor. Compare
it with the one noted before.
6. Rotate the camera accordingly so that the Y coordinate of the object, measured at the two sides
of the field of view, matches.
7. To ch eck that you succeeded, open “find probe” position window, draw a small circle anywhere
on the screen. Then, select a small object and press “move to point”. Next, open “find probe”
window and check whether the small object is in the circle.