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III- 41 Programming Manual Part III Inspection Algorithm Step3: It automatically locates the edge of lead end area and pad lead area by searching the edge of lead end and solder. Make sure that the pink dotted area inclu…
III-40
Programming Manual
Part III Inspection Algorithm
1.13.3 Setting Procedure
Step1: Adjust the size of the inspection window to surround the lead base to pad end. Window
width should be the same as pad width.
Lead Base Area
Gull Wing Area
Lead End Area
Pad Lead Area
Pad Center Area
Pad End Area
Body of IC Component
Figure 1-43 Inspection Window of IC_Solder2
Step2: Lead length and width will be displayed in the upper right corner of the dialog if left-clicking
a lead base and dragging the pointer to opposite corner of the lead end. Enter the window
size shown in the upper right side of the dialog in Lead length and Lead width.
CAUTION
Do not measure the lead size at the lead of the selected inspection window,
otherwise the inspection window is misaligned.
㪉
㪈
Lead Base
Gull Wing Area
Lead End
Pad Lead Area
Pad Center Area
Pad End Area
Body of IC Component
Measure by another pin
Figure 1-44 Enter Lead Length and Lead Width
III-41
Programming Manual
Part III Inspection Algorithm
Step3: It automatically locates the edge of lead end area and pad lead area by searching the edge
of lead end and solder. Make sure that the pink dotted area includes both edge of the lead
end area and solder. If the search range is too small or too large, change the Range value
to adjust the search area size.
NOTE
NG should be always checked.
NOTE
The center of the search area is at the lead end area. Adjust the search area size
by changing the Range value.
Lead length
Range
Lead Base Area
Lead End Area
Pad Lead Area
Figure 1-45 Adjust Range
Step4: Enter the brightness level difference between the lead end and pad lead area in the lower
right side of Range. In the search area, the algorithm calculates maximum brightness level
minus minimum brightness level as the sample value (the sample value is shown in the
lower left side of Range). If the sample value is larger than the OK range, the lead end will
be located. Default is 200. Adjust parameters according to the solder condition.
NOTE
In case the lead end is covered with heavy solder, the fi llet area has brighter
brightness level and the difference between the lead end and pad lead will be
smaller. In this case, enter the search range lower than 200.
III-42
Programming Manual
Part III Inspection Algorithm
Step5: This is the parameter setting for lead length inspection. It calculates the average value of
leads length in the same side of the component. The difference in amount between average
length and actual lead length is shown as sample value (gray text-box in the lower left side
of Lead length judgement). If the sample value is lower than OK range, the result will be
OK. The inspection logic is same as Part III 1.22 AS_Av_LeadLength.
Default is 100 [μm]. If necessary, change the value according to inspection accuracy.
Average value for leads length
Average
Average
Average
Average
in the same side of the body
- Selected lead length
Figure 1-46 Lead Length
Step6: This is the parameter setting for lead shift inspection. The shift amount from lead end area
and pad end area is shown as sample value (gray text-box in the lower left side of Lead
shift judgement). If the sample value is lower than OK range, the result will be OK.
Default is 100 [μm]. If necessary, change the value according to inspection accuracy.
Lead End Area
Pad End Area
Figure 1-47 Lead Shift