User Guide

RS-274D, or subsets of it, is the commonest format, which can be gene
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rated with the CAM Processor. Therefore choose the devices GERBER
and GERBERAUTO. In this case a file with the associated aperture ta
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ble must be supplied, in addition to the files with the plot data. All the
furtherexplanationsinthissectionarebasedonthisformat.
Drill Data
The generation of drill data is very similar to the generation of photo
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plot data. The aim is to create files which are sent to the board manufac
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turer. The appropriate device drivers are SM1000, SM3000, and
EXCELLON. A drill configuration has to be defined before an output
can be generated. The manufacturer must know this configuration, oth
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erwise he cannot drill the proper holes. It is therefore advisable to send
the drill rack configuration file along with the drill data file(s) to the
manufacturer.
EAGLE generates drill holes for the objects pads, vias, and holes. The
appropriate data for pads and vias (plated-through holes) are generated
if layer 44, Drills, is active during the CAM Processor output session.
The data for holes (with no contact between different layers) are gener
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ated if layer 45, Holes, is active. Both layers must be active if all holes
should be drilled together. If they should be drilled separately, either the
HolesortheDrillslayermustbeactive,andtwoseparatefilescreated.
A tolerance can be specified for drills. In such cases please make sure
thatyourDesignRulesaremaintained.
The Rotate option given in the configuration is useful if the board ap
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pearsintheLayoutEditorinlandscapeformat.
DataforMillingMachines
Data used by milling machines are normally drawn in layer 46, Milling.
This is where, for example, the contours of board cut-outs are drawn.
The output is made via the CAM Processor in Gerber or HPGL format.
Agreetherequiredformatwithyourboardmanufacturerbeforehand.
You can generate outline data for milling a prototype board with the
helpoftheUserLanguageprogram outlines.ulp.
StarttheULPwiththeRUNcommand.
Select the layer for which outline data will be generated, define the dia
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meter of the milling tool, and select the output file format (script file
format or HPGL, further formats will follow) in the ULP's dialog win
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dow. The script file containing the outline data can be imported into
EAGLE with the SCRIPT command. In this case use the CAM Proces
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sortogeneratemanufacturingdata.
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EAGLEManual