FISCHER FISCHERSCOPE X-RAY XDLM 231, Operator'S Manual

Page: 183 / 236

FISCHERSCOPE ® X-RAY 181
Pattern Recognition (XDLM 237)
12.Define the search area:

Position of the search area: Place the cursor in the rectangle, keep the left mouse button
pressed and move the rectangle.

Size of the search area: Place the cursor on one of the eight black points, keep the left
mouse button pressed and change the size of the rectangle.
For the measurement of the solder pads, select the area of the vicinity of the pad as the search
area; see Fig. 21.5.
Figure 21.6: The solder pads on an individual printed circuit board
For the printed circuit board panel, a total of 10 pads are to be measured on each individual
printed circuit board; see Fig. 21.6. Of these, 6 pads are very similar. Only one search photo
is defined for them. The 4 lower pads are very different; one photo is defined for each of these.
13.In the Move to saved xy-coordinates area, click Next position .
The XY-stage moves to the next measuring position, to the next pad that is very similar to the
first one. For this measuring position, a separate search photo is not defined but the first search
photo is used.
14.To assign the search photo of the previous measuring position for this measuring position, enter
1 in the Use picture no. field and click Change .
Search image no. 1 is now used for XY position no. 2.
15.Repeat steps 13 to 14 for all 6 pads that are very similar.
16.In the Move to saved xy-coordinates area, click Next position .
The XY-stage moves to the next measuring position, to the next pad. This pad and the following
three pads are different. For this reason, a separate search image is defined for each of these
four pads.
17.Repeat steps 6 to 13 for each of the four different pads. During step 13, make sure that you
define a separate search photo for each pad this time.
18.You have now defined the 10 measuring positions for an individual printed circuit board on
the printed circuit board panel. To define the measuring positions for the other individual
printed circuit boards, you have two possibilities:

You can transfer the programmed search images to the other individual printed circuit
boards with the pattern recognition: Continue with step 19.

You can automate the measurement with a task: Continue with Chap. 21.4.1 on
page 182.
4 different pads
6 similar pads