SIPLACE D4 规格说明书英文版.pdf - 第25页

25 Vision Sensor Technology PCB Position Recognition Bad Board Position Recognition Ink spot criteria Methods • Synthetic fiducial recognition method • Mean gray scale value • Histogram method •T e m p l a t e m a t c h …

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Vision Sensor Technology
PCB Position Recognition
Description
Different fiducial shapes
prove to be optimal depend-
ing on the condition of the
surface. Particularly advis-
able for bare copper surfaces
with little oxidation is the
single cross. Maximum accur-
acy is achieved due to the
high information content.
Rectangle, square and circle
are less "informative" but
save space and can even be
used when oxidation is at an
advanced stage. Advisable
for tinned structures are
circle or square because in
this case the ratio of the fidu-
cial dimensions to the presol-
der thickness is particularly
favorable.
Fiducial criteria
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
Fiducial warp 1/10 of structure width, both with good
contrast to environment
Dimensions of synthetic fiducials
min. X/Y size for circle and rectangle: 0.25 mm
min. X/Y size for annulus and rectangle: 0.3 mm
min. X/Y size for cross: 0.3 mm
min. X/Y size for double-cross: 0.5 mm
min. X/Y size for lozenge: 0.35 mm
min. frame width for annulus and rectangle: 0.1 mm
min. bar width / bar distance for cross, double-cross: 0.1 mm
max. X/Y size for fiducial shapes: 3 mm
max. bar width for cross / double-cross: 1.5 mm
min. tolerances, general: 2% of nominal dimension
max. tolerances, general: 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
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Vision Sensor Technology
PCB Position Recognition
Bad Board Position Recognition
Ink spot criteria
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 page 24
min. 0.3 mm
max. 5 mm
Masking material good coverage
Recognition time depends on the method: 20 ms - 200ms
Description
In the cluster technology
each subpanel is assigned an
ink spot. If this is present
during the measurement via
the PCB vision module, the
corresponding subpanel is
populated.
With this function it is pos-
sible to eliminate costs due to
unnecessary population of
faulty subpanels.
Technical data for PCB position recognition
PCB fiducials
Local fiducials
Library memory for recognition
of bad panels
up to 3 (subpanels and multiple panels)
up to 6 for the Long board option (Optional PCB fiducials
are output by the optimization.)
up to 2 per PCB (may be of different type)
up to 255 fiducial types per subpanel
Image analysis Edge detection method (Singular feature) based on gray-
scale values
Lighting method Front lighting
Fiducial recognition time 0.1 s
Field of vision 5.78 x 5.78 mm
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SIPLACE Software
SIPLACE offers holistic solu-
tions based on modular soft-
ware tools for SMT machine,
line and production manage-
ment: the SIPLACE software
suite.
Product definition, opti-
mization and line control
Fast, fault-free introduction
of products and optimum
utilization of production lines
are essential to maximize
production output. The pro-
grams from the SIPLACE soft-
ware suite allow you to easily
program products, fine-tune
the programs you have
created and then find the
balance for them within your
SMT production lines.
Production monitoring &
process control
To achieve the production
targets that are set, it is
important to constantly mon-
itor and check the production
facilities. The SIPLACE soft-
ware suite contains monitor-
ing products tailored to suit
the user group. These signal
immediately if limits are
exceeded on the machine or
the production line.
Set-up verification &
traceability
Set-up errors lead to series
errors. The user-friendly
SIPLACE software programs
help you to avoid such errors,
and thus ensure high quality
in your electronics produc-
tion.
The benefits of the SIPLACE
software suite at a glance:
• Fast programming and
error detection
• Reduces changeover times
and stoppages
• Ensures optimum utiliza-
tion of your production
line's productivity
• Real-time information
from the production area
• Incredibly fast distribution
of information
• Optimum use of resources
• Timely notification when
production materials need
to be re-ordered
• Coordination of mainten-
ance