SM482PLUS_Admin(Eng_Ver2.8).pdf - 第144页
6-26 Multi-Functional Placer SM482( L) PLUS Administrator’s Guide Circle: Circular shape fiducial mark. Diamond: Diamond shap e fiducial mark. Rectangle: Rectangular shape fiducial mark. Rectangle2: Overlapping of 2 rect…
6-25
Board Definition
<Move> button
Move the object selected in the <Device> combo box to the position of the
assigned coordinates. Before executing <Move> button, the cell in the grid
(Coordinates of the fiducial mark) corresponding to the desired position must be
clicked on with a mouse.
<Get> button
Obtain coordinates for XY axis with reference to the object selected in the
<Device> combo box. At this time, the objects (Coordinates of the fiducial mark)
related with coordinates must first be clicked with the mouse before clicking on
the <Get> button.
Memo On Fiducial Marks
A fiducial mark has to satisfy several shape and material conditions.
During the design of PCB, the following precautions should be taken.
8 patterns of fiducial mark shapes are possible as shown in the
figure below (top/bottom symmetry or right/left symmetry)
For the size of A, over 2.0? is recommended. The width of mark
sensor beam is about ø0.7? measured from the surface of PCB
Make sure that any changes in color or shape (solder resist, lead
pattern) that can cause error should not be found within 2.0?of
fiducial mark's outer edges.
Make sure that the shading difference exits between the fiducial
mark and the board surrounding it.
To ensure search accuracy, coat the surface of the fiducial mark
with copper or lead so that the surface does not reflect. The line
shaped fiducial marks can not be searched with Beam.
<5. Mark List> group
A list of fiducial mark shape data.
<No> column
A serial number of fiducial mark shape.
<Name> column
The name of the fiducial mark (Up to 10 characters)
<Shape> column
Select the shape of fiducial mark. Available shapes are as follows.
6-26
Multi-Functional Placer SM482(L) PLUS Administrator’s Guide
Circle: Circular shape fiducial mark.
Diamond: Diamond shape fiducial mark.
Rectangle: Rectangular shape fiducial mark.
Rectangle2: Overlapping of 2 rectangular fiducial marks.
Triangle: Triangular shape fiducial mark.
Cross: Cross shape fiducial mark.
Butterfly: Butterfly shape fiducial Mark.
Sharp: Sharp(#) shape fiducial mark.
6-27
Board Definition
<6. Form Data> group
Data on the shapes of fiducial marks.
<Size X> edit box
Set the size of fiducial mark in X direction.(Based on the machine coordinate
system)
<Size Y> edit box
Set the size of fiducial mark in Y direction.(Based on the machine coordinate
system)
<Arm> edit box
Set the width of the bar of cross shape fiducial marks.
If the fiducial mark is cross shaped, teach the value corresponding to X correctly
and input is in the <Arm> edit box.
<Polarity> combo box
Select the color of fiducial mark. Available colors are as follows.
White: the mark looks lighter than the surroundings.
Black: the mark looks darker than the surroundings.
<Thickness> edit box
Set the thickness of the fiducial mark.
The value of 0 denotes a full fiducial mark.
0 A value other than 0 denotes that value for the thickness of the exterior line.