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SIPLACE 80S-20/F4/F5 User M anual 5 Vision Func tions 05/99 Issue from Software Vers ion SR.405.xx 5.5 Teach Fiducial Line en gineer 5 - 53 Fig. 5.5.14 T each fiducial menu, T each with standard values video image NOTE H…

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5 Vision Functions SIPLACE 80S-20/F4/F5 User Manual
5.5 Teach Fiducial 05/99 Issue from Software Version SR.405.xx
5 - 52 Line engineer
If a new fiducial number has been input then you can select the
Standard values
options. If you have loaded
an existing fiducial all options will be accessible. In the menu the following options will be available:
– Changing the parameters of the fiducial structure fields (template)
– Changing the parameters of the search area
– Teaching with standard values
Fiducial structure field parameters are
– width,
– height and
– camera resolution
Search area parameters are
– width and
– height
The parameters are stored in a list in the station computer. This list is initialized with default and current values
when the
Load fiducial
option is launched.
If you change a parameter, a teach command will be generated in the machine controller (MC). The only
parameter block which will be added to the teach command in the general parameters will be the block which
has been changed.
For this reason the machine controller generates three different teach commands:
– Teach with standard values
– Teach the search area
– Teach the fiducial structure field (template)
5.5.4.1
Standard Values
Option
When this option is selected
– the menu is closed.
– the teaching process is launched.
– the video image is shown with fiducial, fiducial structure field and uniqueness value.
– header and footer with commentary, measurement results, key assignments and command sequences will
be displayed.
The teaching process will now be launched with the standard values. The result of the teaching process is the
uniqueness value which is shown in the header of the video image. This value provides information on the dif-
ferentiation quality of the fiducial with respect to other structures in the vicinity of the fiducial. The figure dis-
played may range between
0 = unsatisfactory and
100 = very good differentiation capability.
Practice shows that a uniqueness value of at least 60 must be achieved for fiducials and ink dots.
SIPLACE 80S-20/F4/F5 User Manual 5 Vision Functions
05/99 Issue from Software Version SR.405.xx 5.5 Teach Fiducial
Line engineer 5 - 53
Fig. 5.5.14
Teach fiducial
menu,
Teach with standard values
video image
NOTE
However, if you wish to use a fiducial despite the fact that it has a low uniqueness value, you should ensure
that the fiducial has a good quality value (see ’Test Option’, Page 5 - 67.)
If the quality is bad as well, it would be better to select another fiducial (see ’Criteria for Creating Fiducials’ in
Section 5.2.5 from Page 5 - 19).
Use the arrow keys to change the camera position. You can vary the step width by entering a number in
the range 1 - 6.
Press the
Return
key to repeat the teaching process.
Press
Esc
to quit the teaching process. The video image disappears and the
Teach fiducial
menu is dis-
played once more.
teach
1..6 : x/y step
Fiducial No. = 8 Uniqueness = 70
Ret :
Standard values
x/y step width = ...
: x axis +
: x axis -
: y axis +
: y axis -
5 Vision Functions SIPLACE 80S-20/F4/F5 User Manual
5.5 Teach Fiducial 05/99 Issue from Software Version SR.405.xx
5 - 54 Line engineer
5.5.4.2
High, Middle and Low Resolution
Options
When you select one of these options,
– the menu closes,
– the video image is shown with fiducial and search area, and
– header and footer with commentary, measurement results, key assignments and command sequences are
displayed.
Fig. 5.5.15
Teach fiducial
menu,
Change search area
video image
Use the arrow keys to change the camera position. You can specify the step width by entering a number in
the range 1 - 6.
Use the
+
and
-
keys to move the fiducial boundaries and teach them at the same time. With the space bar
you can toggle between horizontal and vertical directions. With the
Tab
key you can toggle the field step
width between 1 pixel and 10 pixels.
Press
Return
to launch the teaching process.
The unique value appears on the screen as the measurement result. This may vary between
0 = unsatisfactory and
100 = very good differentiation capability.
Practice shows that a uniqueness value of at least 60 must be achieved.
Repeat the teaching process a number of times with changed field sizes. In this way you can optimize the
uniqueness value. Reducing the size of the search area to dimensions which are less than those of the
fiducial itself will increase the uniqueness value since the fiducial ends will for example when wetted with
Fiducial No. = 8 Uniqueness = 70
Blank: hor./vert.
Tab : field step
Template high res.
1..6 : x/y step
: x axis +
: x axis -
: y axis +
: y axis -
x/y step width = ...Direction = ...
Field step = ...
Ret: teach
- : smaller
+ : larger