TR7500E_Manual_en_v28 - 第221页

C h a p t e r 3 A O I A T P G F u n c t i o n i n s t r u c t i on T R 7500 U S E R M A N U AL 2 14 l Ali g n w i n d o w i s u s e d p r o j ec t i o n i n X - Y d i r e c ti o n ( M e t h o d 3 ) t o r e l o ca t e I C…

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resolution.
l Pass level setting
n Bridge Threshold – The threshold to judge the black and white.
n Bridge Range Ratio – Set the percentage of pixels to inspect
n Bridge Type – Set the direction to inspect.
11.2.7. Polarity Pair
l You should move a pair of windows to different position with variation of gray
level. System will show polarity fail if the gray level of two windows is reverse.
11.2.8. Align
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l Align window is used projection in X-Y direction (Method3) to relocate IC or
Rnet (Cnet) when PCB has warp. And align only relocate one component.
l Pass level setting
11.2.9. Warp
l We premise that warp in one FOV is same. Each component has relationship
with warp model. When inspection, wrap will calculate the shift distance in X-Y
direction. Each component will add the shift and start to test the component is
fail or not.You can select method 1 or method 2 to do pattern matching. FOV
proposing being inspected from the camera with angle must have [Warp].
l You can only add [Warp] in train dialog.
11.2.10. ROI
l ROI is an inspection box to inspect the scrape of surface.
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l Set the ROI parameters
n Train –Set the parameter for training
u Sensitivity – Take 70 for example. If the difference of gray level
between neighbor pixels are larger than 30 (100-70) the two pixels will
be regarded as edges.
u Mask Zone – Take 1 for example. Beside the edge points the neighbor
1 pixel point is masked as untest.
n Inspection Parameter – Set the parameter for inspection. The system only
inspects the area that is in ROI box and not masked.
u Inspect Sensitivity – Take 60 for example. If the difference of gray
level between neighbor pixels are larger than 40 (100-60) the two
pixels will be regarded as edges.
u Tolerance – Take 5 for example. If a group size of edges is more than 5
the inspection window should be regard as failed.
n The [Sensitivity] value must be bigger than [Inspect Sensitivity] or it will
result more false alarm.
11.2.11. Extra Blob
l Extra blob is an inspection box to inspect lead open or the scratch of surface.
l Pass level setting