YSI_Prog_E - 第87页
2-16 2 Creating inspection pr ograms 2.4.1 Basic parameters Basic parameters [T emplate] button 24211-P6-00 A. Algorithm T ype T he algorithm type is selected from the following three types. "F orm" should norm…
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Creating inspection programs
2.4 Fiducial function
Based on the recognized position results of fiducial marks allocated to boards, the fiducial function corrects
errors that may occur from errors in machining the board outline or from the board clamping mechanism, as
well as board warp. This function is used to correct the position of the entire board by registering fiducial
marks in the lower left (or upper left) of the board as Mark 1, and marks in the upper right (or lower right) as
Mark 2. (Up to three marks can be registered.) If required, register block fiducials or local fiducials after
registering board fiducial marks.
Board fiducial mark example
Board
Mark 2
Mark 1
Mark 3
(Register if necessary)
23213-P6-00
n
Fiducial screen
By pressing the [Data Edit] button and opening the "Fiducial" tab, the following fiducial mark setting screen appears.
[Fiducial] tab screen
Basic parameters
[Measure] button
[End Test] button
Threshold slide bar Recognition results
[Save] button
[Light List] button
Mark list
Mark data list
24210-P6-00
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Creating inspection programs
2.4.1 Basic parameters
Basic parameters
[Template] button
24211-P6-00
A. Algorithm Type
The algorithm type is selected from the following three types. "Form" should normally be selected.
If "Pattern Matching" is set, press the [Template] button, open the [Register Template] screen, and register marks in a
template.
• Pattern Matching
Recognizes the mark based on how closely it matches the image template.
• Form
Recognizes the mark based on the "Surface Type", "Std. Area", Mark Size XY", "Circularity", and "Perimeter" parameters.
• Edge
Recognizes the mark based on the "Surface Type" and "Mark Size" parameters.
D. Light Type
Selects the lighting used to recognize the mark.
F, G. Search Area X, Y (mm)
Sets the size of the area in which to search for the mark. Set the mark outline +3.00 mm as a guideline. For example, if
the mark outline is 1 mm as shown below, enter 4 mm. However, if there is a possibility that patterns (resist, silk, etc.)
other than marks may also be detected, narrow the mark detection range value so that only the mark is detected.
1
4
Mark detection range
Mark
Board
Mark detection range example
23214-P6-00
H. Brightness Gain
Adjust this value to brighten the entire image so that the mark is easily recognized.
I. Brightness Offset
Adjust this value to make the entire image darker so that the mark is enhanced.
K. Thresh Lower Limit, L. Thresh Upper Limit
Sets the upper and lower threshold limits for the brightness with which the mark is shown in red when performing mark
recognition.
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M. Shape Type
A selection can be made from the following three shapes. Select from the drop-down list based on the mark being used.
Shape type Description Example
Circle Select if the mark shape is round.
Square/Rectangle Select if the mark shape is square or rectangular.
Special
Select if the mark is made up from a single object, and the mark shape is other
than a circle, square, rectangle, or equilateral triangle.
N. Mark Size (mm)
Enter the mark outline dimensions. The dimensions can be entered automatically if unknown. Press the [Measure] button
and enclose the mark by dragging the mouse. The recognized outline dimensions are set and a test is performed.
R. Circularity
Enter the mark circularity.
The circularity can be entered automatically if unknown.
Press the [Measure] button and enclose the mark by dragging the mouse. The recognized circularity is set and a test is
performed.
T. Tolerance (%)
Sets the extent to which the the margin of error for the set mark setting value and actually recognized value is to be
allowed as a percentage.
Reference value: 20%