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6 Vision functions User M anual HS-50 6.5 Teach Fiducial Software Version SR.501.xx 12/99 Issue U S 222 t I I t 6.5.4.1 St andard V alues O ption When this optio n is sel ected 6 – the menu i s close d. – the teachi ng p…

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User Manual HS-50 6 Vision functions
Software Version SR.501.xx 12/99 Issue US 6.5 Teach Fiducial
221
t IIt
NOTE: 6
Buttons are active when the text on the button is black (rather than gray). This means that you can
launch the associated function by clicking on the button with the mouse.
The Search area button will, for example, only be active if you have 6
– already loaded a fiducial or
– created a new fiducial.
A model must already exist for the selected fiducial.
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: 6
– 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 6
–width,
– height and
– camera resolution
Search area parameters are 6
– 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. 6
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. 6
For this reason the machine controller generates three different teach commands: 6
– Teach with standard values
– Teach the search area
– Teach the fiducial structure field (template)
6 Vision functions User Manual HS-50
6.5 Teach Fiducial Software Version SR.501.xx 12/99 Issue US
222
t IIt
6.5.4.1 Standard Values Option
When this option is selected 6
– 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 se-
quences 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 pro-
vides information on the differentiation quality of the fiducial with respect to other structures in the
vicinity of the fiducial. The figure displayed may range between 6
0 = unsatisfactory and
100 = very good differentiation capability. 6
Practice shows that a uniqueness value of at least 60 must be achieved for fiducials and ink dots. 6
6
Fig. 6.5 - 14 Teach fiducial menu, Teach with standard values video image
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 -
User Manual HS-50 6 Vision functions
Software Version SR.501.xx 12/99 Issue US 6.5 Teach Fiducial
223
t IIt
NOTE 6
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 Section 6.5.6.2
on page ).
If the quality is bad as well, it would be better to select another fiducial (see Criteria for Creating
Fiducials in Section 6.2.5 on page 192).
Å Use the arrow keys to change the camera position. You can vary the step width by entering a
number in the range 1 - 6.
Å Press the Return key to repeat the teaching process.
Å Press Esc to quit the teaching process. The video image disappears and the Teach fiducial
menu is displayed once more.
6.5.4.2 High, Middle and Low Resolution Options
When you select one of these options, 6
– 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 se-
quences are displayed.
6
Fig. 6.5 - 15 Teach fiducial menu, Change search area video image
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