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2-2 2 Inspection data creation and tuning 1.2 Inspection method T his section describes the optical inspection method and X-ra y inspection method used by YSi Series inspection machines. T he models and corresponding ins…
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Inspection data creation and tuning
1. Before creating inspection programs
This section describes aspects to be aware of before creating inspection programs.
1.1 Views and steps
"Views" and "steps" are the essential elements for creating inspection data, and are explained below.
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View
A "view" refers to a single field-of-view captured by the camera and is used as an inspection range. The camera moves to
the set position to perform inspection, and so view frames should be arranged on the board locations to be inspected so
that all parts are covered. If converting mount data to inspection machine data, by selecting the "Auto Assign View" check
box in the "CVT" dialog box, views are created automatically based on the step positions. Furthermore, views can also be
created by pressing the [Auto] button in the "view" screen. For details on view creation, refer to section 2.6, "View
settings", in this chapter.
TIP
The view size (field-of-view) differs depending on the lens, and cannot be changed in the application settings. The
standard view size is approximately 44.6 (X) x 37.4 (Y) mm (19 μm), however, view sizes of 24.6 (X) x 20.6 (Y) mm (10 μm)
or 12.3 (X) x 10.3 (Y) mm (5 μm) are also available with an option.
View creation example
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Step
A "step" is the minimum inspection area within a view. Inspection is performed inside the step frame (inspection area),
and so it is necessary to create steps at the location of the object to be inspected, select inspection items, and set
parameters such as detection conditions and judgment conditions. All steps required for inspection must be created for
each parts, and are registered as parts libraries.
Step creation example
Library
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Inspection data creation and tuning
1.2 Inspection method
This section describes the optical inspection method and X-ray inspection method used by YSi Series inspection
machines.
The models and corresponding inspection methods are shown in the following table.
Model Inspection method
YSi-S Optical inspection + laser unit height measurement *
YSi-12 Optical inspection + laser unit height measurement *
YSi-X Optical inspection + X-ray inspection + laser unit height measurement *
* Laser unit height measurement is optional.
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NOTE
The inspection head and board movement when performing inspection differ depending on the model.
• YSi-S
The inspection head moves in the left and right directions, and the board moves in the forward and back directions.
• YSi-12
The inspection head moves back, forth, left and right above the board.
• YSi-X
The board moves below the inspection head.
1.2.1 Optical inspection
YSi Series inspection machines employ a 3-stage dome lighting method, and by arranging a digital color
camera for inspection in the center of the dome lighting, images are captured without silhouettes. The upper
stage uses white light LEDs (R, G, B) and infrared rays, the middle stage uses white light LEDs (R, G, B), and the
lower stage uses white light LEDs (R, G, B). The lighting best able to judge the inspection object clearly can be
selected from ten different types. By selecting the optimum lighting for the inspection object and setting
conditions for showing the inspection object in red, an OK or NG result is judged by comparing the surface
area and position shown in red with the judgment conditions.
3-stage dome lighting
U: Upper lighting (IR), H: Upper lighting
M: Middle lighting
L: Lower lighting
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Inspection data creation and tuning
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Detection conditions: lighting selection
Select the lighting best able to judge the inspection object clearly, and specify settings for performing inspection with
only the inspection object shown in red. For each step, open the "LIGHT" tab at the [Inspection Program] - "Step" screen,
and select the lighting detection type from "Luminance", "Color", or "Shape".
This section describes the lighting selection if "Luminance" is selected.
1. Click the image list buttons to the right of the sampling light and reduced light values fields to display a list of sampling
light images.
2. Select a lighting that offers good contrast between the area being inspected and the surrounding area (lighting with
which difference in brightness is clearly visible) from the list of sampling light images, and then press the [OK] button.
3. Adjust "Thresh 1” with the threshold slide bar to set the threshold value that shows the inspection area in red.
4. Set the conditions for the inspection object from the area shown in red in the detection conditions parameters.
Image list
Sampling light example
[Light Detail] button
"LIGHT" tab
Sampling light type
Image list buttons
Threshold slide bar
Sampling light type image list
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Judgment conditions
Set the reference for judging OK or NG for the inspection object detected in red with the detection conditions. The
parameters to be set differ depending on the inspection status. For details on the inspection status, see Chapter 4,
"Inspection status", in this manual.