00195941-03-UM SiplaceCA-EN.pdf - 第231页
User Manual SIPLACE CA 3 Technical Data Edition 08/2011 EN 3.13 Vision Cameras 231 3.13.6.3 Fiducial-Criteria 3 Locate 2 fiducials Locate 3 fiducials X-/Y-position, rotatio n an gle, mean PCB distortion Additionally: she…
3 Technical Data User Manual SIPLACE CA
3.13 Vision Cameras Edition 08/2011 EN
230
3.13.6 PCB Camera Multicolor, Type 34, Digital
3.13.6.1 Structure
3
Fig. 3.13 - 7 PCB camera multicolor, type 34, digital
(1) PCB camera lens and illumination
(2) Camera amplifier
3.13.6.2 Technical Data
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PCB fiducials Up to 3 (subpanels and multiple panels)
Up to 6 for the Long board option (Optional PCB fiducials are
output by the optimization.)
Local fiducials Up to 2 per PCB (may be of different type)
Library memory Up to 255 fiducial types per subpanel
Image analysis Edge detection method(singular Feature) on basis of the gray-
scale value
Illumination method Front-illumination (3 levels, programable as required)
Detection time
per fiducial/bad fiducial
20 ms - 200 ms
Field of vision 5,78 mm x 5,78 mm
Distance of focus level 28 mm
User Manual SIPLACE CA 3 Technical Data
Edition 08/2011 EN 3.13 Vision Cameras
231
3.13.6.3 Fiducial-Criteria
3
Locate 2 fiducials
Locate 3 fiducials
X-/Y-position, rotation angle, mean PCB distortion
Additionally: shearing, distortion separately in X and Y direction
Fiducial shapes Synthetic fiducials: circle, cross, square, rectangle, diamond,
circular, square and rectangular contours, double cross
Pattern: any
Fiducial surface
Copper
Tin
Without oxidation and solder resist
Curvature 1/10 of the structure width, respectivly with good
contrast to the surroundings
Dimensions of synthetic fiducials
Min. X/Y size for circle and rectangle:
Min. X/Y size for annulus and rectangle:
Min. X/Y size for cross:
Min. X/Y size for double-cross:
Min. X/Y size for rhombus:
Min. frame width for annulus and rectangle:
Min. bar width / bar distance for cross, double-cross:
Max. X/Y size for all fiducial shapes:
Max. bar width for cross, double-cross:
Min. tolerances, general:
Max. tolerances, general:
0.25 mm
0.3 mm
0.3 mm
0.5 mm
0.35 mm
0.1 mm
0.1 mm
3 mm
1.5 mm
2% of nominal dimension
20% of nominal dimension
Dimensions of patterns
Min. size
Max. size
0.5 mm
3 mm
Fiducial environment Clearance around reference fiducial not necessary if there is no
similar fiducial structure in the search area.
3 Technical Data User Manual SIPLACE CA
3.13 Vision Cameras Edition 08/2011 EN
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3.13.6.4 Inkdot-Criteria
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Methods - Synthetic fiducial recognition method
- Mean grayscale value
- Histogram method
- Template matching
Shapes and sizes of fiducials/
structures for
Synthetic fiducials
Other methods
For dimensions of synthetic fiducials, see Section 3.13.6.3
Fidu-
cial-Criteria
Min. 0.3 mm
Max. 5 mm
Masking material Good coverage
Detection time Depends on the method: 20 ms - 0.2s