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User Manual SIPLACE HS-50 5 Station extensions Software Version SR.50x.xx 01/2006 US Edition 5.5 Ceramic substrate centering 167 base material, such as cera mic or C EM. Fiducia ls cove red with so lder resi st can al so…

5 Station extensions User Manual SIPLACE HS-50

5.5 Ceramic substrate centering Software Version SR.50x.xx 01/2006 US Edition

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5.5.6 Optical centering with the multicolor PCB camera

5.5.6.1 General

As an option, a multicolor PCB camera can be installed in place of the sub-gantry camera. The

multicolor PCB camera offers four different types of illumination. This greatly increases fiducial

recognition and thus the centering accuracy.

Fig. 5.5 - 4 Multicolor PCB camera

5.5.6.2 Types of illumination for the multicolor PCB camera

The following types of illumination can be selected on the multicolor PCB camera.

– Standard lighting

This mixture of white and infrared lighting can be used to detect a broad range of fiducials. The

image contrast can be improved by varying the illumination, thus optimizing the centering of

different fiducials.

– White lighting

This type of illumination is used for standard PCBs with tinned fiducials.

– Blue oblique lighting:

In most cases, this can be used to greatly improve the contrast with bright fiducials on a light

User Manual SIPLACE HS-50 5 Station extensions

Software Version SR.50x.xx 01/2006 US Edition 5.5 Ceramic substrate centering

167

base material, such as ceramic or CEM. Fiducials covered with solder resist can also be

detected better on a light background.

– Infrared lighting

This type of illumination is particularly useful for fiducials that are covered with solder resist or

for fiducials on flex materials. It is also sometimes possible to improve recognition of silver/

platinum fiducials on ceramic. This should be tested by carrying out a test centering /

placement run.

5 Station extensions User Manual SIPLACE HS-50

5.6 PCB data transfer Software Version SR.50x.xx 01/2006 US Edition

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5.6 PCB data transfer

5.6.1 Functional description

The ’Machine options’ menu contains a ’PCB data transfer’ option. The aim of this function is to

increase the placement system’s performance on the line. To do this, an entire PCB is measured

at the

first

placement station and the associated fiducial, single circuit, ink spot, etc. data is deter-

mined, saved and sent to the next station. At subsequent stations, the data is then determined for

two fiducial positions only. These two fiducial positions are then used to correct the position for the

PCB to be processed at each station. It is thus not necessary to measure the entire PCB again,

together with its single circuits, ink spots etc.

5.6.2 Activating the ’PCB data transfer’ option

Fig. 5.6 - 1 Machine option: PCB data transfer