Specification SIPLACE CA-Series2014版.pdf - 第34页
34 Vision Sensor Technology PCB Position Recognition Description Different fiducial shapes prove to be optim al depend- ing on the condition of the surface. When using bar e copper surfaces with low oxi- dation, it is ad…
33
Component Feeding
Dummy Feeder Modules
Dummy feeder module for one track
Danger
To ensure that your SIPLACE placement machine runs safely, a feeder must be assigned to
every location on the component trolley.
If you do not have enough feeder modules, then you should use dummy feeder modules as
space holders.
Dummy feeder module for the component trolley of the X series (CA series)
The dummy feeder module for the SIPLACE X series occupies one track on the component
trolley.
34
Vision Sensor Technology
PCB Position Recognition
Description
Different fiducial shapes
prove to be optimal depend-
ing on the condition of the
surface. When using bare
copper surfaces with low oxi-
dation, it is advisable to take
the single cross, as the high
amount of information pro-
vided helps achieve the
greatest accuracy. Rectan-
gle, square and circle are
less "informative" but save
space and can even be used
when oxidation is at an
advanced stage. Circle or
square are advisable for tin-
plated structures as the ratio
of the fiducial dimensions to
the presolder thickness is
particularly favorable.
Fiducial criteria
Locate 2 fiducials
Locate 3 fiducials
X/Y position, rotation angle, mean PCB distortion
Additional: shearing, distortion separately in X and Y direc-
tion
Locate 2 fiducials
X/Y position, rotation angle without stretch
a
.
a) Option: Wafer Level Fan Out (WLFO)
Fiducial shapes Synthetic fiducials: circle, cross, square, rectangle, dia-
mond, circular, square and rectangular contours, double
cross, pattern: any
Fiducial surface:
Copper
Tin
Without oxidation and solder resist
Warpage of fiducial ≤ 1/10 of structure width, both with good
contrast to environment
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
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 rhombus: 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 all 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
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Vision Sensor Technology
PCB Position Recognition
Bad Board 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
34
Min. 0.3 mm
Max. 5 mm
Masking material Good coverage
Recognition time Depends on the method: 20 ms - 200s
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. This function
helps prevent unnecessary
costs caused by placement
of defective panels.
Technical data board position recognition
PCB fiducials
Local fiducials
Library memory f. 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
Illumination mode Front lighting
Fiducial recognition time 0.1 s
Field of vision 5.78 mm x 5.78 mm
Virtual ink spot handler (optional from station software 705)
The virtual ink spot handler enables you to import ink spots from an external system. These ink
spots can then be assigned to the relevant board.