VI User Manual - 第205页
Tools library Vision 2007 4.10 User Manua l Rev 01 7 - 43 7.8.6 Bridges inspection Bridges inspection uses histograms or edges placed between 2 le ads. Each bridge inspec- tion can have individual p arameters and can be …
Tools library
7 - 42 Vision 2007 4.10 User Manual Rev 01
Individual lead setting: choice of the lead by
choosing his location on the component side
(
A), and the which one number on this side.
Individual histogram setting: select the lead
side (
B) tab to set the wanted histogram.
Select the
Light level (C): each histogram can
have its own light level.
In
End of lead AND/OR left AND/OR right (D)
specify the global test result definition.
Press
TEST (E) button to test and display the 3
histograms results.
Press
Propagate >> (F) button (in the lead side
tab) to propagate the parameters to the 3 histo-
grams: end of lead, left and right.
Press
Propagate >>> (G) button (in the com-
ponent side tab) to propagate the parameters
to all the leads and all the sides.
3 histograms are used to detect joint
around the lead.
You can specify the global joint test re-
sult according to these three one: it is
a boolean function.
End of lead histo First operator Left histo Second operator Right histo Global result
OK AND (NOT OK OR OK) = OK
OK AND (NOT OK AND OK) = NOT OK
NOT OK AND (NOT OK OR OK) = NOT OK
NOT OK OR (OK AND OK) = OK
NOT OK OR (NOT OK AND OK) = NOT OK
NOT OK OR (NOT OK OR OK) = OK
A
B
C
D
E
F
G
Custom
Tools library
Vision 2007 4.10 User Manual Rev 01 7 - 43
7.8.6 Bridges inspection
Bridges inspection uses histograms or edges
placed between 2 leads. Each bridge inspec-
tion can have individual parameters and can be
active or not.
Select the tab (
A) of the component side to edit.
In
Number
(
B
), select the bridge number to edit.
Tick Active processing (C) to run the bridge
inspection,
Change, if necessary, in
Offset X & Y, Width
and Length (D) the tool window size and posi-
tion,
Choose to use an
Edge or an Histogram (E) to
check the solder bridge,
In
Light level (F) select the light level to use.
Press
Propagate >>> (G) button to propagate
the parameters to all the leads and all the
sides.
A
B
C
D
E
F
G
Custom
Tools library
7 - 44 Vision 2007 4.10 User Manual Rev 01
7.9 Profiler
™
in Custom
The Profiler
™
tool, included in the Custom tool is used to detect the
lifted leads and bad joints. The method is based on the analysis of
the gray level profile of each lead and joint.
When a lead is lifted, his position and his angle change. The light is
consequently reflected differently. The appearance of joint can also
change. The gray level repartition along the lead and the joint is
thus different between a lifted and a joined lead. The Profiler
™
method uses this characteristic to detect lifted leads and bad joints.
A profile is a projection onto one axis, of the gray level sum.
7.9.1 Profiler™ tool description
Profiler
™
tool works within comparison to references. Principle is to verify that profile of each
lead/joint of a component are included into tolerances.
There are 2 Profiler modes for Custom tool :
Fixed and Dynamic.
The main differences between these 2 modes are the way to set profile reference curve.
With
Dynamic mode, for each side, profile reference curve is set with profiles average of all
leads of this side. By this way, profile reference curve is set dynamically (the user does not
have to set it) and as a result, tolerances curves are set dynamically.
With
Fixed mode, the reference curve is set with profile curve of one lead. By this way, the
user has to set it manually.
For both mode, the profile reference curve for
Lead to lead is set with average of all leads of all
sides.
These 2 modes are constituted of 2 parts:
The
Global adjustment
tool, based on a global comparison of leads profile. 2 modes are available:
- Standard mode: which contains tolerance algorithm (see § 6.9.2 Profiler™ tool using)
-
Expert mode: which contains advanced algorithm
The
Lead to lead tool, based on a comparison lead with lead on a same component. This
analysis detects leads that are not similar to the other leads of the component. It allows to
take into account variations of production. On this tool, the same 2 modes (
Standard and Ex-
pert
) are available.
These 2 parts are necessary because of the variability of a production. In fact, on a same com-
ponent, welding and lead have the same aspect. On the other hand, during production, shape
of lead and aspect of welding can change.
Lead
Lead
axis
Gradient
Lead
axis
Profile