YSD_Users_E.pdf - 第244页

5-55 5 Creating the board data A, B: Mark Out Size Referring to the table below , enter the correct v alue in the mark size. T his parameter is not displa yed w hen "Mark T ype" of the Basic parameters is set t…

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6.3 Shape parameters
Shape parameters
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Shape Type
The Shape Type can be selected from the following 5 types.
From the drop-down list, select the type that matches the mark being used.
Setting Description Example
Circle
Square
Triangle
Sp. Shape
Corner
Select to detect a circular mark.
Select to detect a square mark.
Select to detect an equilateral triangular mark.
Select to detect a special mark other than above.
Select to detect a corner of a pattern as a mark.
Shape Type settings
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Example of special mark
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TIP
If you use a special mark composed of two or more objects, set the Algorithm Type parameter (described later) to
“Pattern”. In this case, the “Shape” parameter is ignored during recognition, so you can set this parameter to any
type. (For more details, see “6.6 Pattern matching” in this chapter.)
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A, B: Mark Out Size
Referring to the table below, enter the correct value in the mark size. This parameter is not displayed when "Mark Type"
of the Basic parameters is set to "Badmark". The Search Area parameters appear instead.
Example Mark Out Size settingShape Type
X
X
Y
Y
Enter the diameter.
Enter the length of each side.
Enter the length of one side.
Enter the X length for the MarkOutSize X, and
the Y length for the MarkOutSize Y.
Enter the length of the shorter side displayed
within the search area.
Circle
Square
Triangle
Sp. Shape
Corner
Mark Out Size settings
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C: Area (mm
2
)
This parameter is displayed only when the Shape Type parameter is set to “Sp. Shape”. Enter the area of the mark in mm
2
.
D: Outline (mm)
This parameter is displayed only when the Shape Type parameter is set to “Sp. Shape”. Enter the perimeter of the mark in
mm.
n
NOTE
A recognition error may occur due to environmental conditions such as illumination. In such cases, enter a larger
value than previously used for “Tolerance” of the Vision parameters, or set the tolerance to 100%, then perform the
vision test in the Mark Adjust mode and enter the obtained data on the area and perimeter. (The mark area and
perimeter values are displayed after the vision test is complete.) Return the tolerance to the original value after the
data is obtained.
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6.4 Vision parameters
Vision parameters
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A: Surface Type
This specifies the bright and dark relation between the mark surface and board (surrounding area). Refer to the table
below.
Shape Type
Board is brighter than mark.
Shape Type
Mark is brighter than Board.
Shape Type
Brightness comparison
Image
Board
Mark
Board
Mark
Surface Type settings
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B: Algorithm Type
There are 6 algorithm types selectable for mark recognition.
• Normal
In typical recognition, all types of marks should be set to “Normal”. Try setting to other parameters if the mark cannot
be recognized with the “Normal” setting.
• Special 1
Select this if the mark cannot be recognized by the “Normal” setting.
• Special 2
Select this if the mark which cannot be recognized by the “Normal” setting has a cutout area.
• PTRN Outline, PTRN GrayLev, PTRN Whole
Select these parameters when the Shape Type parameter is set to “Pattern”. For more details, refer to “5.6. Pattern
matching” in this chapter.
C: Mark Threshold
This is the threshold level for binary image used to recognize the mark. An optimum threshold level can be found in the
Mark Adjust mode explained later in this section.
D: Tolerance
This specifies a tolerance percentage for the mark size when the mark is recognized with the vision system. (Typically
this should be set to “30”.)