Owner's manual

Programming Basics and Setup 5-37
7. Select Corner Finder.
8. Click on
Next.
 Notice the calipers in the video display window.
Figure 5-23 Corner Finder Fiducial Window – Corner Finder Tab
9. Using the position controls, move the dispensing head to the lower left-hand corner of Flip
Chip 1 on Side 1 of the Tutorial Board.
 Notice the green square in the area below the video display. This is the Quadrant
Model, a representation of the part onto which you will dispense. The highlighted
corner of the quadrant should be the same corner where the fiducial will be taught.
10. Click on the LLHC of the Quadrant Model.
 The caliper orientation will change.
11. Adjust the camera position so the edges of the flip chip run up and down the center of
the calipers.
12. Adjust the Search Length and Projection Length to experiment with their effect.
 The Search Length should be optimized so that it contains only one gray value
transition (light to dark, or dark to light). A longer caliper increases the range for
finding the corner, but also increases the chance of finding the wrong corner.
 Projection Length controls the averaging for the transition amplification. A wider
caliper is better for rough edges or eliminating noise caused by traces on the board.
Thinner calipers are more immune to rotated parts.