DEK INFINITY USER MANUAL.pdf.pdf - 第72页

INFINITY 0$&+,1( 352*5$ 00,1* 67$*( 9,6,21 6<67(0 6(783 1.70 User Manual Software Versi on 7 Positional Information When selecting a V ideo Model, if the image shapes have edges all in the X direction or a…

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INFINITY
0$&+,1(352*5$00,1*
67$*(9,6,216<67(06(783
Software Version 7 User Manual 1.69
Histogram The histogram gives a graphical representation of the grey scale values within
the box set around the fiducial. As can be seen there are two peaks which
represent the light and dark areas of the picture. Ideally there should be two
distinct peaks, the separation of which can be changed by varying the lighting
levels.
Experience of changing these parameters, while viewing the histogram, demon-
strates their effects
Optimizing a Video
Model
When using a Video Model, selection of a good image shape is critical. The
following are some basic guidelines for selection of an optimum image.
Fine and Course
Features
As with fiducials, areas of a board selected as a Video Model should have shapes
with a solid consistent tone within the boundaries (course features) and not
shapes with inner lines or lettering (fine features).
Black
% Area
Within Box
Mid Grey White
Model with Fine Features Model with Course Features
INFINITY
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67$*(9,6,216<67(06(783
1.70 User Manual Software Version 7
Positional
Information
When selecting a Video Model, if the image shapes have edges all in the X
direction or all in the Y direction, not enough positional information exists for
the camera system. An image with good X and Y information is necessary for
accurate positioning:
Preparing the
Vision System
The vision system learns the fiducial during a board setup. The fiducial
coordinates are entered into the product file during the editing of a default file.
This enables the camera to find the fiducials initially. The setup needs to be run
in step mode from the status page.
The following procedure is typical for all fiducial shapes, although in this
instance a circle fiducial shape is referred to throughout.
1. Select Mode (F1) until Step is indicated in the mode option on the screen.
2. Select Exit (F8).
3. Place the board onto the conveyor.
4. Select Run (F1).
No Positional information
in the X direction
No positional information
in the Y direction
Equal positional information
in the X and Y directions.
Video Model
The procedure for creating a Video Model is very similar to that for creating a
Fiducial, throughout the following fiducial procedure, boxes like this contain
alternative procedure steps, to allow the setup of a Video Model.
Mode
Load
Data
Edit
Data
Setup
Squeegee
Change
Screen
Change
Tooling
Change
Language
Exit
Mode
Load
Data
Edit
Data
Setup
Squeegee
Change
Screen
Change
Tooling
Change
Language
Exit
Run Head
Paste
Load
Clean
Screen
Adjust Setup Monitor Maint.
INFINITY
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67$*(9,6,216<67(06(783
Software Version 7 User Manual 1.71
If the Camera Idle Position in Set Preferences is set to Behind Rail, the
following window and menu bar is displayed:
Selecting Continue Run clears the warning window and the print cycle
continues.
Selecting End Run clears the warning window, the print cycle is aborted and
control is returned to the ready page.
If the Unload Board Start in Set Preferences is set to Separation, the follow-
ing window and menu bar is displayed:
Selecting Continue Run clears the warning window and the print cycle
continues.
Selecting End Run clears the warning window, the print cycle is aborted and
control is returned to the ready page.
NOTE
If Camera Idle Position is set to Behind Rail and Unload Board Start is set
to Separation, the warning windows appear one after the other in the order
shown above.
5. Select Auto Board (F1).
Camera Behind Rail Warning
The CAMERA HOME POSITION is set to 'Behind
Rail'
Ensure that no tooling pins or other
obstructions are on the table behind the
rear rail, as these could cause damage to
the camera.
This option will only have an effect for
boards that are less than 250mm wide.
This option can be disabled from the set
preference page.
Continue
Run
End
Run
Unload Board Speedup Warning
The UNLOAD BOARD SPEEDUP option is set to
'Separation'
With this option enabled it should be noted
that there is only a minimal clearance
between the underside of the board and any
tooling being used, while the board is being
unloaded.
This option must not be used for boards that
are populated on the underside, as this
could damage the boards.
Continue
Run
End
Run
Auto
Board
Manual
Board
Knead
Paste
Exit