00197295-01_UM_D4i_SR605_EN.pdf - 第118页
3 Technical data for the machine User manual SIPLACE D4i 3.8 Vision system From software ve rsion SR.605.03 SP2 10/2012 EN edition 118 3.8.2.3 Fiducial criteria 3 Locate 2 fiducials Locate 3 fiducials X-/Y-position, rota…
User manual SIPLACE D4i 3 Technical data for the machine
From software version SR.605.03 SP2 10/2012 EN edition 3.8 Vision system
117
3.8.2 PCB camera, type 34, digital
3.8.2.1 Structure
3
Fig. 3.8 - 2 PCB camera, type 34, digital
(1) PCB camera lens and illumination
(2) Camera amplifier
3.8.2.2 Technical data
3
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) based on grayscale
values
Method of illumination Front-illumination (3 levels, programmable as required)
Detection time per fiducial
/Bad fiducial
20 ms - 200 ms
Field of vision 5.78 x 5.78 mm²
Distance from the focus plane 28 mm
3 Technical data for the machine User manual SIPLACE D4i
3.8 Vision system From software version SR.605.03 SP2 10/2012 EN edition
118
3.8.2.3 Fiducial criteria
3
Locate 2 fiducials
Locate 3 fiducials
X-/Y-position, rotation angle, mean PCB distortion
in addition: shear, distortion in X- and Y-direction separately
Fiducial shapes Synthetic fiducials: circle, cross, square, rectangle, rhombus,
circular, square, and rectangular contours, double cross
any pattern
Fiducial surface
Copper
Tin
Without oxidation and solder resist
Warp 1/10 of structure width, both with good contrast to
environment
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.
User manual SIPLACE D4i 3 Technical data for the machine
From software version SR.605.03 SP2 10/2012 EN edition 3.8 Vision system
119
3.8.2.4 Ink spot criteria
3
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 3.8.2.3
Fidu-
cial criteria, page 118
Min. 0.3 mm
Max. 5 mm
Masking material Good coverage
Recognition time Depends on the method: 20 ms - 0.2s