User Guide

The drill holes are placed, with the desired diameter, on the package us
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ing the HOLE command. The drilling diameter can be retrospectively
changedwithCHANGEDRILL.
The forbidden area for the Autorouter is defined in layer 42, bRestrict,
using the CIRCLE command. For reasons of representational clarity
the circle is shown here with a non-zero width. Circles whose width is 0
are filled. In this case it has no effect on the Autorouter, since it may not
route within the circle in either case. These forbidden areas are also
takenintoaccountbyapolygoninlayer16, Bottom.
8.8 DrawingFrames
It may be true that drawing frames are not components, but they can be
defined as devices with neither packages nor pins. Such devices in EA
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GLE’s frames library contain a symbol consisting merely of a frame of
the appropriate size, and a documentation field, which is also defined as
asymbol.
In both cases the identification point is located at the bottom left, so
that neither the frame nor the documentation field will be unintention
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allyselectedwhileworkingwithinthedrawingarea.
Textvariablesinthedocumentationfield
The text variables >DRAWING_NAME, >LAST_DATE_TIME and
>SHEET are contained, as well as some fixed text. The drawing’s file
name, date and time of the last change appear at these points together
withthesheetnumberintheschematic(e.g., 2/3 =sheet2of3).
In addition, the variable >PLOT_DATE_TIME is available. It contains
thedateandtimeofthelastprintout.
All of these text variables can be placed on the schematic, and (with the
exceptionof >SHEET)ontheboard.
The frame is defined in the device with addlevel Next, and the documen
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tation field with addlevel Must. This means that the documentation field
cannotbedeletedaslongastheframeispresent.
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EAGLEManual