Owner's manual

5-38 Programming Basics and Setup
13. Set the Edge Polarity to Light-dark.
14. Set Minimum Contrast to
2.
 This is the lowest acceptable difference in gray-levels on opposite sides of the edge to
qualify as a transition.
15. Set Caliper Density to
2.
 A lower value will space the calipers farther apart. A higher value will overlap them
more. You can also use fractional numbers (0.5 for example).
 Caliper Density controls how many calipers are used. More calipers may help reduce
the effects of edge irregularities, but will take longer to execute. You should set the
Projection Length and Caliper Density such that you have at least five calipers along the
edge.
16. Click on
Teach.
17. Test the fiducial by clicking on
Find Fid.
 The Test Results indicate if the fiducial was found or not, its found XY coordinates and
how long it took to locate the fiducial.
18. Click on
Next to save the results.