Справочник Пользователя для National Instruments Ultiboard
Chapter 3
Setting Up a Design
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ni.com
4.
If you chose Single Sided or Double Sided, or upon clicking Next
after defining the lamination settings for a multi-layer board:
after defining the lamination settings for a multi-layer board:
•
Define the default Units of measurement for the design.
•
Define the board Reference Point. This can be changed later.
Refer to the Setting the Board’s Reference Point section for more
information.
Refer to the Setting the Board’s Reference Point section for more
information.
•
Define the Board Shape and Size.
•
Set the default Clearance for the board—This is the distance from
the edge of the board that is to be kept free of any other elements.
Trying to run a trace through a clearance, or trying to place a part
so that a pad is put within a clearance, for example, results in a
design rule error.
the edge of the board that is to be kept free of any other elements.
Trying to run a trace through a clearance, or trying to place a part
so that a pad is put within a clearance, for example, results in a
design rule error.
5.
Click Finish. The board outline is placed on your design.
Setting the Board’s Reference Point
The reference point of the board is important for relating physical
dimensions to PCB layouts, since all measurements are shown relative to
this origin point. If you used the Board Wizard, this reference may already
have been set. Refer to the
dimensions to PCB layouts, since all measurements are shown relative to
this origin point. If you used the Board Wizard, this reference may already
have been set. Refer to the
information.
Complete the following steps to set a reference point:
1.
Choose Design»Set Reference Point. The cursor changes as shown in
the figure below.
the figure below.
2.
Click to place the reference point. In the example below, the reference
point has been placed at the lower left corner of the board outline.
point has been placed at the lower left corner of the board outline.