00195193-02 SG D4 FSE en (1).pdf - 第61页
Overview SIPLACE Vision General Overview of Assemblies Student Guide SIPLACE D4 (FSE) EN 09/2006 Overview 61 3.2.8.1.7 Fiducial Criteria Determine 2 fiducials X/Y position, angle of twis t, central PCB displacement Deter…
Overview
General Overview of Assemblies SIPLACE Vision
Student Guide SIPLACE D4 (FSE)
Overview EN 09/2006
60
3.2.8 SIPLACE Vision
The digital SIPLACE Vision solution is another step towards the satisfaction of customer demands for
greater speed, flexibility and robustness.
Advantages of the digital Vision system:
Robust and fast computing algorithms
Flexible measurement processes
Intuitive graphical user interface
Geometric description of components at the machine
State-of-the-art digital camera hardware
Homogenous illumination of camera field of vision and components
Each C&P head has its own digital component camera.
3.2.8.1 Digital PCB Camera (Type 34)
3.2.8.1.6 Technical data
Legend:
1. PCB camera optics and illumination
2. Camera amplifier
PCB fiducials Up to 3 (panels and cluster panels),
Up to 6 for the option "long board" (optional fiducials are issued by the
optimization process).
Local fiducials Up to 2 per PCB (can be of different types)
Library archive Up to 255 fiducial types per panel
Image processing Edge detection method (single feature) based on gray values
Method of illumination Front-lighting (3 levels, programable as required)
Recognition time per
Fiducial/poor fiducial
20 ms - 200 ms
Field of vision 5.78 x 5.78 mm2
Distance from the focus plane 28 mm
Overview
SIPLACE Vision General Overview of Assemblies
Student Guide SIPLACE D4 (FSE)
EN 09/2006 Overview
61
3.2.8.1.7 Fiducial Criteria
Determine 2 fiducials X/Y position, angle of twist, central PCB displacement
Determine 3 fiducials Additional: shearing, displacement separately in X and Y direction
Fiducial shapes Synthetic fiducials: circle , cross , square , rectangle , diamond , circular,
square and rectangular contours, doublecross
Pattern: any
Fiducial surface
Copper Without oxidation and soldering paste
Tin Warpage 1/10 of the structure width, with good contrast to surroundings
Dimensions of synthetic fiducials
Min. X/ Y size for circle and rectangle: 0.25 mm
Min. X/ Y size for square ring and rectangle frame: 0.3 mm
Min. X/ Y size for cross: 0.3 mm
Min. X/ Y size for doublecross: 0.5 mm
Min. X/ Y size for diamond: 0,35 mm
Min. frame width for square ring and rectangle frame: 0,1 mm
Min. bar width/bar spacing for cross, doublecross: 0,1 mm
Max. X/ Y size for all fiducial shapes: 3 mm
Max. bar width/bar spacing for cross, doublecross: 1,5 mm
Min. general tolerances: 2% of nominal
dimensions
Max. general tolerances: 20% of nominal
dimensions
Dimensions of templates
Min. size 0.5 mm
Max. size 3 mm
Fiducial surroundings Space is not needed around the fiducials, provided there are no other similar
fiducial structures in the search field.
Overview
General Overview of Assemblies SIPLACE Vision
Student Guide SIPLACE D4 (FSE)
Overview EN 09/2006
62
3.2.8.1.8 Inkspot Criteria
3.2.8.2 Digital CO Camera C&P12 (Type 28)
Methods Synthetic fiducial detection procedures
Middle gray value
Histogram method
Template matching
Size of fiducial shapes or structures
Synthetic fiducials
For dimensions of synthetic fiducials, see
Section 3.2.8.1.7 Fiducial Cri-
teria [J 58]
.
Other methods Min. 0,3 mm
max. 5 mm
Cover material Covers well
Recognition time Depending on method, 20 ms - 0.2 s
Legend:
1. CO camera optics and illumination
2. Camera amplifier
3. Illumination control