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6 Vision functions User M anual HS-50 6.8 Recommendation for vis ually centering components Software Version SR.501.xx 12 /99 Issue U S 320 t I I t
User Manual HS-50 6 Vision functions
Software Version SR.501.xx 12/99 Issue US 6.8 Recommendation for visually centering components
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6.8.2 General recommendations for centering flip-chips, BGAs and screening
plates
6.8.2.1 Setting the ball contrast parameters
If you select a high value for the ’Ball image’ option in the ’Test component’ menu, this will reduce
the effect of any defective structures. It does mean, however, that there is a possibility that not
every ball will be detected. 6
Set a lower value to ensure that all the balls are detected. This will reduce the reject rate, but the
measurement will take longer.
6.8.2.2 Setting the ball radius parameters
Enter the ball radius on the line computer. This value is automatically reduced by 20 % since the
vision system will detect balls even if the specified dimensions are smaller then their actual phys-
ical dimensions. 6
So, set the ball radius on the station computer and then adjust the quality in the ’Measure’ menu.6
– If no crosses are displayed on the ball, the radius is incorrect or the contrast is too high.
– If several crosses are displayed on a ball, then the radius has been entered incorrectly in the
’Measure’ menu.
PLEASE NOTE 6
We recommend that you select a radius on the line computer that is slightly larger than the
theoretical value and then adjust it in the ’Ball image’ menu. 6
6.8.2.3 Setting the case shape dimension parameters on the station computer
For high-contrast flip-chips and BGAs, you can reduce the physical case shape dimension to the
square surrounding the balls (’Case dimension’ option). This will reduce the measuring time, al-
though it can only be used for single measurements. Size mode must also be active. 6
6.8.3 Visually centering flip-chips
6.8.3.1 Setting the parameters on the station computer
Under the’ Illumination Option’ in the ’Test Component Menu’, select: 6
– a value of around 50 for the medium illumination plane
– a value of around 20 for the steep illumination plane
User Manual HS-50 7 What should you do ...
Software Version SR.501.xx 12/99 Issue US
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7 What should you do ...
This chapter contains a number of subjects that are intended to help you during your daily work
on a SIPLACE line.
For example, you are provided with preventative measures that you can take to minimize the down
time on the machine to obtain the highest possible level of efficiency for the SIPLACE line during
production. 7
In addition, the tasks of the operator and of the line engineer are described in an operator and line
engineer profile, respectively, in this chapter. 7
7