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17 CAMERA SYSTEM MODULE
17.6 APPENDIX A - VISION SYSTEM SETUP
290 TECHNICAL REFERENCE MANUAL Vol 1 E By DEK 04/2019
NOTE
If the changes are not saved, the changes remain in memory until the machine is shut down or an-
other product file is loaded.
► Select Back.
► Select Auto Board.
► Remove the board from the rails.
The above procedure is for a circular fiducial. There are some extra parameters for the other fidu-
cials which are listed in the table below:
Rounding Height Rotation Leg Width
Rectangle Yes Yes Yes No
Diamond No Yes Yes No
Cross No Yes Yes Yes
17.6.2 Video Model
If a board has no fiducials or the condition of the fiducials prevents satisfactory recognition, the
user can employ video models as an alternative to fiducials. Video models use the relationship
between the image of an area of the stencil and the same area of the board to align the board and
stencil. The area of the board selected for use as a video model should have shapes withconsist-
ent, solid boundaries. The shape should also have edges in both the X and Y planes to produce an
image with good X and Y information for accurate positioning.
There are three video model types:
●
Auto - Uses a video model type best suited to the type of fiducial being learnt.
●
Type 1 - Uses a geometric pattern matching technique to produce a synthetic model of the
feature to be learnt. Best suited to features that are not replicated in the camera field of view.
A unique view is ideal for this model.
●
Type 2 - Uses a reference image to make a template of all the features and the board back-
ground within the camera field of view and uses comparison techniques to locate the model. A
good choice where there is duplication in the image such as a BGA device or QFP pad
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Part No: 03217917-01-01 | All rights reserved | © 2019 ASM Assembly Systems Singapore Pte Ltd Group
The information in this brochure contains only general descriptions and/or performance features which may not always apply to concrete products as described or which may
change as a result of technical developments and advances. Any specific performance features and/or capabilities will only be binding if contractually agreed upon.
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