Infinity EX Screens and Screen Images.pdf - 第4页
INFINITY EX SCRE ENS AN D SCRE EN IM AGES IMAGE POSITIONING 26.4 Technical Reference Manu al Chapter Issue 1 Mar 01 IMA GE POSITIONING T o allo w the screen printer to be set up c onsistently , it is important that the i…
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SCREENS AND SCREEN IMAGES
SCREEN FRAME ADAPTORS
Chapter Issue 1 Mar 01 Technical Reference Manual 26.3
Adaptor Assembly To assemble the frame adaptor and position the screen in the adaptor proceed as
follows:
1. Position the screen on the centre rails locating the correct fixing holes. The
screen fits under the centre rails.
2. Secure the screen to the rails using the 4 cap screws.
3. Position the screen and centre rails on the side rails, adjust to achieve the
dimension of 622mm. The centre rails fit under the side rails.
4. Secure the centre rails to the side rails using the 8 cap screws.
5. Check the dimension of 622mm, adjust if necessary.
Figure 26-1 Universal Screen Adaptor
12x12(12x17)
Centre Rail
17x17(17x12) 20x20
DEK 240\260
15x15
Side Rail
Plan View on Adaptor Showing Frame Fixing Positions
622.0mm
+/- 1.0mm
(See Note)
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SCREENS AND SCREEN IMAGES
IMAGE POSITIONING
26.4 Technical Reference Manual Chapter Issue 1 Mar 01
IMAGE POSITIONING
To allow the screen printer to be set up consistently, it is important that the image
in the screen frame is accurately positioned.
The screen image can be either centre or front justified.
The Figures on the following pages, show the required dimensions.
It is imperative that the image is placed squarely in the screen frame within the
given dimensions.
At the end of this section an example is given for artwork positioning of a front
justified image on a DEK 265 screen frame.
Image Positioning
Data
The position of the image on the screen is accessed using information from the
product file created by the operator and from data stored during machine
configuration.
The information required to set the correct position is as follows:
Image Justification
Centre Justified The image is positioned on the screen such that the centre of the board coincides
with the centre of the screen as indicated in the figure DEK Screen - Centre
Justified.
Front Edge Justified The image is positioned on the screen such that the front edge of the board is as
indicated in the figure DEK Screen - Front Edge Justified.
Y Axis Positioning The important dimension to adhere to is the position of the artwork in the Y
direction. This dimension shows the position of the inner edge of the front rail
relative to the outer edge of the screen frame when the screen parameters are set.
On most artwork there are usually corner alignment marks showing the board
outline. These can be used to specify the positioning of the artwork relative to
the outer edge of the screen frame.
All dimensions are specified to ±1mm.
It is usual practice to measure from the nearest pad to the edge of the board and
to specify which pad the dimension has been measured.
X Axis Positioning The artwork is positioned centrally on the board therefore positioning of the
artwork in the X direction is achieved by placing the centre of the image about
the centre of the screen frame. This position should be specified to ±1mm.
Parameter Options Accessed
Screen Type DEK 265 - 29
″x 29″
DEK 249/UIC Fuji
4000 Sanyo
Entered in the Set Preferences option of the
Maint. function.
Image Justification Centre Justified or
Edge Justified
This parameter is programmed into each
particular board file for each product.
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SCREENS AND SCREEN IMAGES
IMAGE POSITIONING
Chapter Issue 1 Mar 01 Technical Reference Manual 26.5
Figure 26-2 DEK Screen - Front Edge Justified
Figure 26-3 DEK Screen - Centre Justified
Machine CentreLineReference
Board
Metal Mask
Supporting Mesh
ScreenFrame
Artwork Position
Relativeto
Board FrontEdge
A
B
Enlarged View
622.0mm
+/- 1.0mm
NOTE
For ScreenProductionthe Following Information is Required:
1. Overall dimension of board i.e.length and width
2. Dimensions and (see EnlargedView)AB
Machine Centre Line Reference
Machine CentreLine
Reference
NOTE
The centrelinedimensions quoted must take into account the frametolerances.
Board
Metal Mask
Supporting Mesh
Screen Frame
Centre point
X = 368.3 mm
Y= 368.3 mm
Y
X