User Guide

SettheGrid
First set the appropriate grid (50 mil in this case) using the GRID com
-
mand,andletthegridlinesbevisible.
ThegridcaneasilybeshownandhiddenwiththeF6functionkey.
PlacePads
Use the PAD command, and place the solder pads in accordance with
the specifications on the data sheet. The pads should be arranged in such
a way that the coordinate origin is located somewhere near the center of
thepackage.
Each pad can have individual properties such as its Shape, Diameter and
Drill hole diameter. Enter the desired pad shape (the default is octagon),
and specify the hole diameter. The pad diameter is defined with the stan
-
dard value auto (respectively 0), since the size is finally determined in
the layout by means of the Design Rules. The pad appears in the library
withthedefaultvalueof55mil.
You may, however, assign an individual value. If, for instance, you spec
-
ify 70 mil, the consequence is that the diameter of the pad on the board
cannot be less than 70 mil. You select this value when the PAD com
-
mand is active (i.e. the pad is attached to the mouse cursor) using the
parameter toolbar. It is also possible to specify the drill hole diameter
andthepadshape.
TheparametertoolbarwhenthePADcommandisactive
The properties of pads that have already been placed can be altered at a
later stage by means of the CHANGE command. Click on the
CHANGE icon and select the property and the appropriate value. Then
click on the pads whose properties are to be altered. CHANGE can also
be applied to groups (using the GROUP command). After the property
hasbeenselected,clickinsidethegroupwiththerightmousebutton.
As soon as a pad has been placed, EAGLE automatically generates sol
-
der stop symbols in layers 29 and 30, t/bStop. The dimensions of the sol
-
der stop symbols is specified in the Design Rules (the Stopframe
parameter).
PadName
EAGLE automatically assigns pad names, P$1, P$2, P$3 etc., as place
-
ment proceeds. Assign the names in accordance with the information in
the data book. The names can easily be checked by clicking the Op
-
tions/Set/Misc menu and choosing the Display pad names option. All the
padnamesaredisplayedwhenthescreenisnextredrawn(F2).
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EAGLEManual