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

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FISCHERSCOPE ® X-RAY 171
Pattern Recognition (XDLM 237)
21 Pattern Recognition (XDLM 237)
The instrument XDLM 237 is equipped with a motor-driven XY-stage. Pattern recognition allows you
to place specimens reliably even under difficult conditions. The WinFTM software saves a search
item (pattern) and looks for it during the measurement. It then adjusts the XY-stage so that the search
item is found and the measurement is done at the correct position. Advantages:

Reduction of operator influence when the specimens are positioned

Reduction of the influence of the dimensional tolerances of the specimens

Time-saving measurement of e.g. bulk material and plug contacts
You can use the pattern recognition e.g. when measuring the coating thickness on the following
objects:

Contacts on printed circuit boards

Plug contacts

SMD components
Videos with pattern recognition applications can be found on the following website:
www.helmut-fischer.com/pattern-recognition
21.1 Scenarios: Pattern Recognition, XY Programming and Task
Programming
You can combine the pattern recognition with XY programming and task programming. The two
following typical scenarios are explained in this chapter:

The coating thickness on the contact pads of SMD components is to be determined. The position
of the SMD components varies greatly, but the instrument still finds the exact measuring posi-
tion. The clever arrangement of the search item and the search area produces an automatic
feed. In this way, you do not have to carry out any XY programming but can still automatically
measure at several measuring points, see Chap. 21.3 on page 174.

Process control or incoming goods inspections of printed circuit boards: For a printed circuit
board panel with several individual PCB's, the coating of the contact pads is to be checked.
Fluctuations in the positioning and manufacturing tolerances have a strong effect on small struc-
tures. You can roughly pre-position the measuring points with the XY programming and then
move to the exact measuring position with the pattern recognition. You can automate the
complete sequence of measurements with a task, see Chap. 21.4 on page 178.
To use the pattern recognition function, the WinFTM extension SUPER must be activated.