Hanwha SM481 PLUS Series Administrator’s Guide Eng.pdf.pdf - 第132页
6-22 Fast Flexible Placer SM481(L) PLUS Administ r ator’s Guide Memo On Fiducial Marks A fiducial mark has to satisfy several shape and material conditions. During t he design of PCB , the following pre ca utions should …
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Board Definition
<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.
<Station> group
Indicates the station in which the current PCB is to be worked on. (F2: Front, R2:
Rear)
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Fast Flexible Placer SM481(L) PLUS Administrator’s Guide
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.
Circle: Circular shape fiducial mark.
Diamond: Diamond shape fiducial mark.
Rectangle: Rectangular shape fiducial mark.
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Board Definition
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. 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)