创建组件识别数据的方法.pdf - 第56页
56/178 IM-SMT-VSNDI C-0002 -000 2.7.1 Special recogn ition in the PLCC Recog nition mode There are sev eral special r ecognition alg orithms available for PLCC recognition mode. 1) S pecia l 1: Side Lead F itting This m …
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[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 36
Note:
“Lead width” check function may not be available for the old softwares.
The following is the actual example of the recognition of the normal lead tip detection and root
detection.
Items to be set Set value
Alignment Group IC
Alignment Type PLCC
Comp. Threshold 50
Comp. Tolerance 15
Search Area (mm) 6.0
Body Size X (mm) 17.53
Body Size Y (mm) 17.53
Body Size Z (mm) 4.30
Ruler Offset 5
Ruler Width 3
Lead Number N 11
Lead Number E 11
Reflect LL. (mm) 1.4
Lead Width (mm) 0.43
Lead Pitch (mm) 1.27
Table 37
When performing root recognition, it may not be able to be detected without inputting the
correct Lead length. Please check the display of the defined shape to make sure it matches to
the actual component.
<Lead tip detection> <Lead root detection>
Figure 47
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2.7.1 Special recognition in the PLCC Recognition mode
There are several special recognition algorithms available for PLCC recognition mode.
1) Special 1: Side Lead Fitting
This mode improves the recognition rate by checking the positional relations
between the leads and extracting the combination best fits the component
definition when detecting the end leads.
Option 1: Lead detection flag
As mentioned above, it is possible to perform Lead root detection by setting the option.
[ How to set the detection position when the Root detection mode is used ]
In the Root Detection mode, the root position of the lead is set as the reference lead position
(Find Pos). (See Figure 48.)
Figure 48
Bit position
Lead Search (0:Tip, 1:Root)
Find Pos X E1
Find Pos X N1
Find Pos Y E1
Find Pos Y N1
Find Pos X W1
Find Pos Y W1
Find Pos Y S1
Find Pos X S1
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Option 3: Recognition Flag
Option 4: Corner detection filter:
2) Special 2: NS Base Search
In this mode, SOJ recognition is performed by first using the leads in the N/S
direction, then based on the data, the recognition of W/E direction is performed.
Option 1: Lead detection flag (same as Special 1)
Option 3
: Recognition Flag (same as Special 1)
3) Special 3: WE Base Search
In this mode, SOJ recognition is performed by first using the leads in the W/E
direction, then based on the data, the recognition of N/S direction is performed.
Option 1
: Lead detection flag (same as Special 1)
Option 3: Recognition Flag (same as Special 1)
4) Special 4: Check Direction
It compares the average brightness of the specified circular region and the
other circular region located 180 degrees opposed (diagonal) from the
specified circular region in order to identify the direction.
Option 1: Lead Detection Flag (same as Special 1)
Option 2: Direction of mark: (0:N, 1:S, 2:W, 3:E)
Option 3: Recognition flag (same as Special 1)
Option 4: Corner detection filter (same as Special1)
Bit position
Excessive Lead Check (0:Non, 1:Exist)
(It checks whether the extra leads exist outside of pitch 1)
Bit position
Lead Search Filter: (0:None, 1:Once, 2: Twice)
(Noise
elimination
filter is used when detecting the corner.)
Right Angle Fitting: 0:None, 1:Exist
(It checks the perpendicularity of the candidate
adjacent sides when extracting the corner.)