Horizon UserManualV6 - 第87页
43. Press the System button. 44. Select Change Screen (F2). Adjust Change Screen Board Clamps Set Stop Exit 45. Select Exit (F8). Adjust Change Screen Board Clamps Set Stop Exit 46. Select Exit (F8). Adjust Open Cover Re…
38. Lift the front printhead cover.
39. Select Board Clamps (F3), to open the clamps.
Adjust
Board
Clamps
Set
Stop
Exit
40. Remove the board from the rails.
41. Load the appropriate stencil for the product file loaded, ensuring the correct
orientation of the stencil.
42. Lower the front printhead cover.
1.70 User Manual Software Version 6
MACHINE PROGRAMMING
STAGE 5E
43. Press the System button.
44. Select Change Screen (F2).
Adjust
Change
Screen
Board
Clamps
Set
Stop
Exit
45. Select Exit (F8).
Adjust Change
Screen
Board
Clamps
Set
Stop
Exit
46. Select Exit (F8).
Adjust Open
Cover
Remove
Cleaner
Board
Stop
Full
Width
Load
Width
Print
Height
Exit
47. Go to Stage 6.
Software Version 6 User Manual 1.71
MACHINE PROGRAMMING
STAGE 5E
STAGE 6
Vision System Setup
Introduction
The printer uses a vision system to carry out the following:
•
Stencil/Board Alignment
•
2Di Inspection (optional)
•
Board Identification - Selective Print/Pass Through (optional)
After the board is fed to the board stop position, the camera moves into position
to view the relative board and screen features. The information from these
camera images is used by the vision system to identify the board, if selective
print/pass through is enabled and to calculate the screen correction needed to
align the screen to the board. The camera and vision system is also used for 2Di
inspection, if enabled, for further information refer to the 2Di chapter in this
manual.
Fiducials A fiducial is an alignment mark which is produced as a part of the artwork of the
board and the screen. There are normally several of these marks on each board,
some of which are used for board alignment and some for alignment when
placing components on the board. These marks, therefore, should be in the same
relative position on both board and screen.
The vision system has a library of synthetic fiducials of the most commonly
found shapes. The dimensions of these fiducials can be tailored by the operator
to fit the fiducials on the board and screen. After the vision system has been
taught these fiducial parameters, it is able to search the field of view of the
camera and recognize any features which resemble these fiducials. The centre of
the fiducial is calculated and used as the point of location.
The vision system conducts a search in the field of view of the camera looking
for any shape that resembles the programmed fiducial. After finding a shape it is
assigned a score comparing its shape and size to the shape and size of the fiducial
in the vision system memory. This score is set between 1 and 999, the better the
fit the higher the score.
NOTE
However, this does not mean that a fiducial score of 900 for example aligns more
accurately than a fiducial score of 700 for example.
This score is used, in conjunction with acceptance parameters set by the
operator, to recognize the fiducial. The available fiducial shapes are:
•
Circle
•
Rectangle
•
Diamond
•
Triangle
•
Double Square
•
Cross
1.72 User Manual Software Version 6
MACHINE PROGRAMMING
STAGE 6
CIRCLE CROSS DIAMOND TRIANGLE RECTANGLE DOUBLE SQUARE