VI User Manual - 第198页

Tools library 7 - 36 Vision 2007 4.10 User Manual Re v 01 7.8 Custom The Custom tool is available in the library to inspect automatically exotic SO and QFP components or connectors. To inspect so lder joints and bridges …

Tools library

Vision 2007 4.10 User Manual Rev 01 7 - 35

7.7.6.2 Accurate detection of the component position

This position is cal-

culated from the

edges that are posi-

tioned at either end

of the component

lead.

The next window appears when you click on the Accurate detection of component po-

sition button.

Searching area

Position X & Y (A): position

offset of the double transition

edge.

Width & Length

(

): edge size.

Parameters

Expected width

(

) of the com-

ponent body.

Tolerance

(

) on the expect-

ed width.

Contrast & Filter Half Size

(E): edge parameters used.

Propagate to all of areas (F) button: propagation to the other tabs.

7.7.6.3 Solder joint and bridge detection

This treatment is performed in the same way as

for the SO tool, except that the edges and histo-

grams are positioned on the 4 sides of the com-

ponent.

Solder bridge (A).

Faulty weld joint (B).

This diagram only shows 8 edges positioned, but the tool positions one for each

lead. With the position of each lead end, the exact position (X, Y,

θ) of the com-

ponent can be calculated.

Score

by contrast

A B

SO or QFP model

Tools library

7 - 36 Vision 2007 4.10 User Manual Rev 01

7.8 Custom

The Custom tool is available in the library to inspect automatically exotic SO and QFP components or

connectors. To inspect solder joints and bridges on components with a different number of pins, with

pins of different size and position and color:

 You can set different parameters for each pin.

 You can test and active each pin individually.

The component detection is made in 2 steps:

 Body detection.

 Leads detection.

After finding the precise component position, each joint and bridge inspection tool is automatically

placed. This tool can be used for multizones components (the only difference is the body detection).

7.8.1 Model description tab

Follow this procedure to easily program a

component.

1. Draw a synthetic image with Build Model

Type 2. You can still program a custom

model if you do not have any synthetic

image.

2. When opening the custom edition, enter

all the component features in the oppo-

site window.

3. On the Model description tab, in the

Edit a model window, click on the

button. The bmp file name to add in picture list window appears. Select the image on which

load the treatment.

4. Click on Edit area button to define the component size.

5. Choose the treatment operation: Custom, a new tab appears (with the inspection tool name)

behind the Model description tab.

The Custom tool is based on the QFP tool. When opening the custom edit page, all the treat-

ment areas are automatically placed according to the component features. You just have to

check that these parameters fit on real components.

Load a real image on the camera display and adapt the parameters.

You can just create regular SO

and QFP on this interface.

When you create a Custom, use the encompassing rectangle dimension to initialize

Custom tool dimension.

When you use synthetic model, click on

Auto area button to define the component

size.

Tools library

Vision 2007 4.10 User Manual Rev 01 7 - 37

7.8.2 Custom tab

The Custom tool is based on the

QFP tool. When opening the custom

edit page, all the treatment areas are

automatically placed according to the

component features.

Check that these parameters fit on

real components.

Load a real image on the camera dis-

play and adapt the parameters.

7.8.3 Body detection

7.8.3.1 Algorithm

If one of these 3 steps fails, the

component is missing.

Missing

component

Missing

component

Missing

component

Return Theta

Angle

detection

fails ?

Return X

Width

detection

fails ?

Return Y

Height

detection

fails ?

Yes

Custom