User Guide

Thermal or annulus apertures are only emulated with draw apertures if
the Emulate Thermal or Emulate Annulus options, respectively, are acti
-
vated.
The file name.gpi indicates the need for emulation and which apertures
mustbeemulated.
Arcs with flat caps (CHANGE CAP FLAT) will always
be emulated
and drawn with short small wires (draw aperture). Arcs with round caps
won'tbeemulated.
Aperture Tolerances
If you enter tolerances for draw and/or flash apertures, then if the aper
-
ture with the exact value is not available the CAM Processor will use ap
-
ertures within the tolerances. Please bear in mind that your Design
Rulesmightnotbeobservedasaresultofallowingtolerances!
Refertofile name.gpi fortolerancesused.
DefiningtheApertureConfiguration
The CAM Processor distinguishes DRAW apertures from FLASH aper
-
tures. The first type is used to draw objects (e.g. tracks). The second
type is used to generate symbols (e.g. pads) by a light flash. Only if
draw apertures are defined can the plotter draw lines. Therefore, if the
plotter doesn’t distinguish between draw and flash apertures, you must
additionallydefineroundoroctagonalaperturesasdrawapertures.
Thefollowing aperturesareavailable:
NameDimension
Drawdiameter
Rounddiameter
Squarelength
Octagondiameter
Rectanglelength-Xxwidth-Y
Ovaldiameter-Xxdiameter-Y
Annulusoutsidediameterxinsidediam.
Thermaloutsidediameterxinsidediam.
UseofAperture ShapesintheCAMProcessor:
Drawdrawswiresandemulates
apertures
Rounddrawsroundpadsandvias
Squaredrawssquarepads,SMDsandvias
Octagondrawsoctagonalpadsandvias
withthesameX-andY-dimensions
RectangledrawsrectanglesandSMDs
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EAGLEManual