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1 - 2 S tudent Guide SIPLACE X Contents Edition 02/2005 2
Student Guide SIPLACE X
Edition 02/2005 Contents
1
Chapter
Table of Contents
8 Siplace Vision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
8.1 PCB Fiducials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
8.1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
8.1.2 Kind of illumination for fiducials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
8.1.2.1 Fiducial arrangement on the PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
8.1.3 Import fiducials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
8.1.4 Shape of fiducials for PCB position and placement position recognition. . . . . . . . . . . 5
8.1.5 Synthetic fiducials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
8.1.6 Pattern as fiducials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
8.1.7 Bad mark recognition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
8.1.8 Synthetic bad mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
8.1.9 Pattern for bad marks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.1.9.1 The histogram method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8.1.9.2 The brightness method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8.1.9.3 Template-process for LASER-labeling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
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Student Guide SIPLACE X
Contents Edition 02/2005
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1 - 3
Student Guide SIPLACE X
Edition 02/2005 8 Siplace Vision
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8 Siplace Vision
8.1 PCB Fiducials
Digital PCB-camera with Multicolor-illumination.
8.1.1 General
l
This digital version of the PCB-'Multicolor'-camera SST 24 is different to the SST type 18 - the an-
alogue 'Multicolor'-PCB-camera -.
8.1.2 Kind of illumination for fiducials
As a recommendation on kind of illuminations in respect on the PCB material:
Parameter PCB-camera
For Machine X2 ; X3; X4
SST 24
Resolution 11,7 µm/pixel
Field of view 5,7 x 5,7 mm (695x494 Pixel / used: 494x494 Pixel)
min. fiducial size Cycle, square, rectangle 0,25 x 0,25 mm / and their rings 0.3x0.3 mm /cross 0,3 x 0.3
mm / double cross, diamond (is a 45° square) 0,5 x 0,5mm (make at diamond
0.25mm edge length or 0,35 mm height/width). min. Stroke thickness each structure
fiducial 0,1mm.
max. fiducial size 3 x 3 mm
Kind of illumina-
tion / -colors
Blue
IR diffuse (flat)
IR steep
White diffuse (flat)
White steep
Kind of illumination /
color
PCB-Material Example
Blue to recognize gold- or silver colored fidu-
cials on white (ceramic) material
e.g. Gold on ceramic
IR diffuse To recognize (solder resist) dull paint lay-
ered fiducials (also Glass plates)
IR go through solder resist and illumi-
nate covered fiducials.
IR-steep is always
combined with diffuse
To recognize shiny paint layered fidu-
cials
White diffuse To recognize dull fiducials on any other
PCB material and surface
Hot leveling fiducials
White steep is always
combined with diffuse
To recognize shiny fiducial surfaces