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2 PCB Camera Multicolor (Option) User Manual SIPLACE S-25 HM / HS-50 2.2 Illumination Sett ing Software Version SC.502.xx 11/00 Issue 30 , OOXPLQDWLR Q6HWWLQJ 3RVVLEOH,OOXPLQDWLRQ6HWWLQJVDQG6HOHF WLRQ&…
User Manual SIPLACE S-25 HM / HS-50 2 PCB Camera Multicolor (Option)
Software Version SC.502.xx 11/00 Issue 2.1 Using the Camera
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The optional PCB camera Multicolor is used on SIPLACE S-25 HM und HS-50 in place of the sub-
gantry camera (PCB camera with normal illumination) or the optional oblique illumination. It im-
proves recognition of the fiducials (reference marks) and - in the result - the accuracy of
placement.
NOTE:
To ensure optimal placement results, we recommend that you adjust the Z-position of the camera
(the camera’s focal point) to the current thickness of the substrate or PCB on the basis of the table
in Section 2.3. To do this, remove or install the distance plate (spacer) found in the retrofit kit "PCB
camera Multicolor" remove / install the distance plate (spacer) from / under the PCB camera Mul-
ticolor The distance plate is contained in the retrofit kit "PCB camera Multicolor".
The steps this requires are described in Section 2.3.3, etc.
2 PCB Camera Multicolor (Option) User Manual SIPLACE S-25 HM / HS-50
2.2 Illumination Setting Software Version SC.502.xx 11/00 Issue
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The following types of illumination are possible with the PCB camera Multicolor by using the per-
tinent setting (see Section 2.2.3):
– Standard light:
Using this mixture of white and IR light it is possible to recognize a broad range of fiducials. By
selecting special types of illumination, the contrast of the image can be improved and, as a
consequence, the range of recognizable fiducials increased.
– White light:
This is used for
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PCBs (tinned fiducials).
– Blue oblique illumination:
By using this light, an obvious improvement in contrast can usually be attained where bright
fiducials on a light base material are involved, e.g., on ceramic or CEM. In a few instances,
fiducials covered by solder resist can also be recognized better on a light background.
–IR light:
It is usually practical to use this type of illumination for fiducials that are covered by solder resist
or for fiducials on flex material. It may also be possible to improve recognition where silver-plat-
inum fiducials on ceramic are involved. Ascertain this in advance by conducting a trial center-
ing and/or a trial placement.
User Manual SIPLACE S-25 HM / HS-50 2 PCB Camera Multicolor (Option)
Software Version SC.502.xx 11/00 Issue 2.2 Illumination Setting
31
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The following table is derived from empirical values and is therefore only to serve as an orienta-
tional aid. A few materials often exhibit very drastic fluctuations (particularly in the case of CEM1),
therefore the best illumination has to be ascertained through testing. In each instance this is done
by selecting the setting for illumination during the course of a sample placement with recognition
of the position of the pertinent PCBs or ceramic substrates.
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In case of doubt, the best illumination selection must be ascertained by using the function "Test
the fiducial" or the substrate to be populated.
NOTE:
The processes which must be executed prior to setting the illumination are described in detail in
the section "Teaching Fiducials" or "Teaching Synthetic Fiducials" of the User Manual, Software
version SC 502.xx.
During them, the current substrate or PCB is moved onto the processing belt of the conveyor and
mechanically centered / clamped in place.
Å Select the ICON "Setting illumination"
Å In the "illumination" menu select the "Setting illumination" button.
The following screen will appear:
Base material Fiducial material Oblique illu-
mination
BLUE
Infrared
illumination
White illumi-
nation
FR 4 Tin x
Ceramic NiAu, Cu, AgPl x
Ceramic AgPt x
CEM1 Bright copper fiducials,
tin
x
CEM1 Fiducials covered by sol-
der resist
(x) x
Flex on alumi-
num carrier
x