00198382-03_UM_SIPLACE-CA4-V2_EN.pdf - 第141页
Instruction manual SIPLACE CA4 V2 3 Technical data and assemblie s From software version 713.0 Ed ition 12/2019 3.7 PCB conveyor syst em 141 3.7.9.4 Ink spot criteria 3 Methods - Synthetic fiduc ial recognition method - …
3 Technical data and assemblies Instruction manual SIPLACE CA4 V2
3.7 PCB conveyor system From software version 713.0 Edition 12/2019
140
3.7.9.3 Fiducial criteria
3
Locate 2 fiducials
Locate 3 fiducials
X-/Y-position, rotation angle, mean PCB distortion
additional: 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
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
*a
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.
*)a To ensure good production quality of boards, a minimum X/Y size of 0.075 is possible
for circle fiducials under the following conditions:
Absolutely no other objects are in the square search area and fiducial size + 0.2 mm visi-
ble.
Example: Circle fiducial with X/Y size of 0.075 mm requires a search area without visible
objects of ≥ 0.075 + 0.2 mm = 0.275 mm.
Instruction manual SIPLACE CA4 V2 3 Technical data and assemblies
From software version 713.0 Edition 12/2019 3.7 PCB conveyor system
141
3.7.9.4 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 3.7.9.3
Fidu-
cial criteria, page 140.
Min. 0.3 mm
Max. 5 mm
Masking material Good coverage
Recognition time Depends on the method: 20 ms - 0.2s
3 Technical data and assemblies Instruction manual SIPLACE CA4 V2
3.7 PCB conveyor system From software version 713.0 Edition 12/2019
142