MV-9_Chapter 5. Teaching.pdf - 第215页
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MV-9 User Manual
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[Figure 5-272 shift inspection result]
5.4.3 Finding center position of LED package
- It is algorithm to measure center position of LED package mounted in BLU. Center position
of LED package is relative center position for reference point on the right and left of a
package. This algorithm is used for data to compare with center position of lens mounted
on LED package in post process rather than inspection purpose.
3) Teaching window
[Figure 5-273 teaching example]
[Table 5-19 center of LED package component search application algorithm]
applied algorithm
detection item
PKG
mounting inspection
position
compensation
Finding center of binary
inspection-component
Finding
component
center
reference point
(mark)
4) Teaching method
① Mounting inspection teaching and setting
错误!使用“开始”选项卡将 제목 2 应用于要在此处显示的文字。错误!使用“开始”选项卡将 제목 2 应用
于要在此处显示的文字。 .
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- Position compensation function is used for mounting inspection.
[Figure 5-274 teaching example]
② Reference point (mark) teaching and setting
- Center position of LED package is relative position for center position of circle reference
point.
- Create binary inspection window to detect center position of reference point, select
component center search, and select circle for figure type.
- Check at „Use Subpixel‟. If Cognex license key is installed, check at „Use Cognex‟.
- Select preview, and adjust binarization for proper separation of edge of reference point.
- Conduct trial inspection to display center position of reference point at current central point
in inspection window. After normally calculating center, click reference central point
registration.
- Set tolerance range as big as possible. (Reference: reference point is used as criteria to
inspect X/Y-shift of LED package during BLU inspection. Hence, tolerance range is
meaningless.)
MV-9 User Manual
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[Figure 5-275 Center of binary inspection-component search inspection setting and preview image]
- Center Point: position of hole center in inspection window.
- Circle Radius: radius of detected circle.
- CenterPoint Offset x, y: difference between reference central point and current central
point.
[Figure 5-276 center of binary inspection-component search result]