创建组件识别数据的方法.pdf - 第49页
49/178 IM-SMT-VSNDI C-0002 -000 This m ode is used for reco gnition of standard QF Ps. Figure 43 [Recognition check items ] Items Y es / No Notes Body Size No Lead pitch Y es The pitch in th e direction with one lead is …
48/178
IM-SMT-VSNDIC-0002-000
2.6. QFPs
Setting the data in Table 31 is required to create the component data of QFP components.
<Items to be set for QFPs>
Items to be set Set value
Explanation
Alignment Group IC Sets the component category.
Alignment Type QFP 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
Lead Number N
Sets the number of leads in the cross direction.
Lead Number E
Sets the number of leads in the lengthwise
direction.
Lead Pitch (mm)
Sets the lead pitch.
Lead Width (mm)
Sets the width of the lead.
Reflect LL. (mm)
Sets the lead length on the image.
Bumper Mask (mm)
When the QFP has bumpers, it sets so that the
range from the intersection point of the detection
lines and the set value are not to be detected.
( Normally, 0 is set for QFPs.)
Table 31
49/178
IM-SMT-VSNDIC-0002-000
This mode is used for recognition of standard QFPs.
Figure 43
[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 32
Note:
1. This function may not be available for some old softwares.
<Items to be set for QFPs>
Items to be set Set value
Alignment Group IC
Alignment Type QFP
Comp. Threshold 50
Comp. Tolerance 30
Search Area (mm) 6.0
Body Size X (mm) 16.0
Body Size Y (mm) 16.0
Body Size Z (mm) 1.5
Ruler Offset 2
Ruler Width 3
Lead Number N 25
Lead Number E 25
Lead Pitch (mm) 0.5
Lead Width (mm) 0.18
Reflect LL. (mm) 0.5
Bumper Mask (mm) 0
Table 33
Body Size Y
Body Size X
Pitch
Lead width
Lead length
50/178
IM-SMT-VSNDIC-0002-000
Figure 44
2.6.1. Special recognition in the QFP Recognition mode
There are some special algorithms available for QFP 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 3: Recognition Flag
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 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.
4) Special 4: Check Lead Length
In this mode, a function that checks the lead length is added to the normal
QFP recognition.
It checks whether the distance between the straight line running across the
Bit position
Excessive Lead Check (0:Non, 1:Exist)
(It checks whether the extra leads exist outside of the pitch 1.)