VI User Manual.pdf - 第193页
Tools library Vision 2007 4.10 User Manua l Rev 01 7 - 31 7.7.5 SO The SO tool retu rns the (X, Y, θ ) position of the component with the joint faults and welding bridge faults. 7.7.5.1 Body detection Body detection of t…
Tools library
7 - 30 Vision 2007 4.10 User Manual Rev 01
7.7.3 SO or QFP model edition
For SO and QFPs, 2 tools check the presence and position of the component as well as any
joints and solder bridges.
If you program a SO or QFP tool and you want to check the joints and / or welding bridges of
the model, enter 1-J1 in the Joint field, and 1-B1 in the Bridge field. J1 and B1 respectively con-
tain the number of faulty joints and the number of solder bridges detected. The result of the
equation must be positive (> 0) for the test to be considered valid. Therefore, if there are no
faulty joints or bridges (J1 = B1 = 0), the 2 equations are equal to 1.
Vision 2007 sends back solder_afterOven and bridge_afterReflow for these 2 faults.
For these 2 tools, it is very important to define the component size in your .tst file, bearing in
mind the lead length. These tools use the leads to determine the position of the components and
if the leads are outside the camera range, the tool will return a false fault.
We recommend creation of an image representing the component, using BuildModel.
If you draw a TYPE 2 model with BuildModel, the image will contain all the parameters enabling
automatic creation of the SO or QFP model in the library.
7.7.4 Model description tab
1.
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 to load the treatment.
2. Click on Edit area button to define the treatment area.
3. Choose the treatment operation: SO or QFP, a new tab appears (with the inspection tool
name) behind the Model description tab.
4. The software asks if you want to use the
image parameters to create the model.
If you answer no or if you have not cre-
ated an image with BuildModel, the
Specifications of component window
appears to enter the specifications of
your components.
If you have created an image with Build
Model, enter its name in the Model im-
age field of the Model description tab.
After filling in all the fields, click OK and
the model will be initialized automatical-
ly with the parameters you have just en-
tered.
The SO model must be drawn with the leads at the top and bottom
of the image as shown opposite
Gray levels used:
Body: 30
Leads: 226
Background: 128
When you use synthetic model, click on
Auto area
button to define the component size.
SO or QFP model
Tools library
Vision 2007 4.10 User Manual Rev 01 7 - 31
7.7.5 SO
The SO tool returns the (X, Y, θ) position of the component with the joint faults and welding
bridge faults.
7.7.5.1 Body detection
Body detection of the SO
component is performed by
a double transition edge.
The window which appears
when you click on the Body
detection button gives ac-
cess to the parameters of
this edge.
Body detection tab
Position X & Y (A): double
edge position offset.
Width & Length (B): edge
size.
Expected width (C) of the
component body.
Tolerance (D) on the ex-
pected width.
Contrast & Filter Half Size
(E): edge parameters used.
Shift checking tab
This option processing is
used if the component is
shifted by one lead width.
Tick Active Processing (A)
box to activate the process if
you want to check the posi-
tion in X of your component
with the body and not the
lead.
In the Shift checking tab,
Searching area (B) and Pa-
rameters (C) are the same
that for Body detection tab
(see above).
Transition: white
Î
black and black
Î
white
Pos Y1
Pos Y2
Score by size
and contrast
A B
C
D
E
B
A
C
SO or QFP model
Tools library
7 - 32 Vision 2007 4.10 User Manual Rev 01
7.7.5.2 Component’s leads detection
Component’s leads detection po-
sitions a double transition edge
on each component lead in order
to find its position and send back
the averageIf this test fails, you
will have a missing error.
The component lead detection
button opens a window contain-
ing 2 tabs. One is for the leads at
the top of the component and one for the leads at the bottom.
Searching area
Position X & Y (A): all
edges offset.
Width & Length (B): edges
size.
Parameters
Expected width (C): lead
width.
Tolerance (D) on the ex-
pected width.
Contrast & Half size filter
(E): edge parameters used.
Propagate to all of areas
(F) button: propagation to the other tab.
Component characteristics
Pins number (G): number of pins.
Pin width & length (H): pin dimensions.
Range ( I ): distance between each pin.
Deducted default parameters (J) button: change the edge characteristics according to
the component.
7.7.5.3 End of leads detection
End of leads detection places an
edge at each end of the component
leads and allows the Y position and
the component angle to be found.
If you click on the End of leads de-
tection button opens a window
containing 2 tabs. One is for the
leads at the top of the component and one for the leads at the bottom.
This diagram shows 4
edges. In fact, there are
edges on all the leads.
2N transition: black
Î
white and white
Î
black
Score by size
and contrast
N1
A B
C
D
E
F
G
I
H
J
Transition: white
Î
black
Score
by contrast
SO or QFP model