Infinity EX Screens and Screen Images.pdf - 第6页
INFINITY EX SCRE ENS AN D SCRE EN IM AGES IMAGE POSITIONING 26.6 Technical Reference Manu al Chapter Issue 1 Mar 01 Custom Screen Image User definable screen image positions are accommodated for with the Custom Screen me…
INFINITY
EX
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
INFINITY
EX
SCREENS AND SCREEN IMAGES
IMAGE POSITIONING
26.6 Technical Reference Manual Chapter Issue 1 Mar 01
Custom Screen
Image
User definable screen image positions are accommodated for with the Custom
Screen menu parameter.
Selecting Custom Screen activates the following menu parameters:
• Print Area Length
• Print Area Width
• Distance to Image
Print Area Length The Print Area Length parameter is used to control the board width ranges. This
is the maximum printable distance in the Y direction, ie the maximum distance
the squeegee can travel, front to back.
Print Area Width The Print Area Width is used to control the board stop position and the paste
dispenser start and stop positions. For certain screen widths a warning is
displayed that the screen clean unit should not be used. This is the maximum
length of squeegee that could be fiited to the printer, taking into account screen
frame and the amount of mesh surrounding the mask. This is also the maximum
length of paste that can be dispensed.
NOTE
When setting ‘print area’ parameters, care must be taken to ensure that a large
enough safety margin is maintained between the board edges and inside edges
of the screen frame. An adequate safety margin prevents any process problems
and allows for squeegee movement and screen alignment. A distance of at least
60mm is usually acceptable.
Distance to Image The parameter has two meanings depending on whether Centre Justified or Edge
Justified image is selected.
For a Centre Justified image the Distance to Image measurement is the distance
from the outside rear of the screen frame to the centre of the image.
For an Edge Justified Image the Distance to Image measurement is the distance
from the outside rear of the screen frame to the front edge of the board. Care
must be taken to ensure that this measurement is to the edge of the board, not the
front of the image. Add the distance between the front edge of the board and the
foremost aperture, to the distance between the outside rear of the screen frame
and the front edge of the foremost aperture.
X Axis Offset The setting of the Custom Screen parameters only effects the Y screen load
position. Any offset in the X direction must be adjusted by offsetting the board
stop position.
INFINITY
EX
SCREENS AND SCREEN IMAGES
IMAGE POSITIONING
Chapter Issue 1 Mar 01 Technical Reference Manual 26.7
The following figure shows the Custom Screen parameters relative to a screen
frame.
Figure 26-4 Custom Screen Parameters
Board Length
Print Area Width
(maximum board length)
Distance To Image
(When centre justified)
Distance To Image
(When front justified)
Board
Width
Front Rail
Print Area Length
(maximum board width)