创建组件识别数据的方法.pdf - 第45页
45/178 IM-SMT-VSNDI C-0002 -000 Figure 38 < Main ligh t and Coaxal li ght are turned on > Figure 39 < A ll th e illumination sour ces are turned o n: M ain light , Coaxal ligh t and Side light > Figure 40 Lea…
44/178
IM-SMT-VSNDIC-0002-000
7. Special 7: Direction check by Lead width
The direction is determined by using the thick leads in the lead row.
Figure 37
2.5. SOJs
<Items to be set for SOJ>
Items to be set Set value
Explanation
Alignment Group IC Sets the component category.
Alignment Type SOJ Sets the component type.
Comp. Threshold
Sets the detection level difference for lead
detection. (See
“Appendix 2. Detection level
differences used to detect leads (threshold value)
”.)
Comp. Tolerance
Specifies the tolerance of lead pitch as a
percentage.
Search Area (mm) Sets the range of the detection.
Body Size X (mm) Sets the size of the outer edge.
Body Size Y (mm) Sets the size of the outer edge.
Body Size Z (mm) Sets the size of the outer edge.
Ruler Offset Sets the offset amount for the detection line.
Ruler Width 3
Lead Number
Sets the number of leads on one side.
Reflect LL. (mm)
Sets the lead length on the image.
Lead Width (mm)
Sets the width of the lead.
Lead Pitch (mm)
Sets the pitch.
Table 28
SOJs and SOPs are similar in terms of shape. However, unlike SOPs, the lead tips of SOJs
cannot be stably recognized in some cases (because the shape of the leads are not planer).
In order to improve the recognition rate, the positional relations between the leads are
checked and the combination best fits the component definition is extracted when the end
leads are detected.
Also, in some cases, all of the illumination sources (Main light, Coaxal light and Side light)
need to be turned on in order to light up the leads stably. In this case, “Yes” should be
selected from the “All Lighting On” recognition parameter.
As shown in Figure 40, the leads will be clearly recognized when all the illumination sources
are turned on.
Option 1: The position of the wide lead in the N/W
direction. (e.g.:4)
Option 2: The position of the wide lead in the S/E
direction (e.g.:2)
45/178
IM-SMT-VSNDIC-0002-000
Figure 38
< Main light and Coaxal light are turned on>
Figure 39
< All the illumination sources are turned on: Main light , Coaxal light and Side light >
Figure 40
Lead length
Lead width
Pitch
Body Size Y
Body Size X
46/178
IM-SMT-VSNDIC-0002-000
If the recognition is still not stable, Lead root recognition mode should be used.
In this mode, the root of the lead is recognized not the tip.
When this recognition mode is selected, either “Inside Recognition” or “Inside +
LeadAutoSearch” should be selected for ”Recognition Way” in the recognition parameters.
As shown in Figure 39, the lead tips look split and the roots where the leads are attached are
visible, which affect the recognition of SOJs.
In this case, Lead rood recognition mode provides the stable recognition by detecting the
inner leads.
Moreover, with the “Lead Auto Search”, the LeadPitch and LeadWidth parameters are used
when the row of leads is detected, and leads that match these definition data are picked out
during lead detection.
[Recognition check items]
Items Yes / No Notes
Body Size No
Lead pitch Yes The pitch in the direction with one lead is not checked.
Lead width
May exist
Checks only when the lead width is more than 1.0mm.
(Note 1)
Reflect LL No
Find Pos No
Table 29
Note:
1. “Lead width check” function may not be available for some old softwares.
The following is the actual example of the recognition of the normal lead tip detection and root
detection.
<<Items to be set for SOJs>>
Items to be set Set value
Alignment Group IC
Alignment Type SOJ
Comp. Threshold 50
Comp. Tolerance 30
Search Area (mm) 3.0
Body Size X (mm) 8.64
Body Size Y (mm) 18.42
Body Size Z (mm) 3.50
Ruler Offset 6
Ruler Width 3
Lead Number 14
Reflect LL. (mm) 1.80
Lead Width (mm) 0.43
Lead Pitch (mm) 1.27
Table 30
When performing inside recognition, it may not be able to detect the component without
inputting the correct Lead length. Please check the display of the defined shape to make sure
it matches to the actual component.