RS-274X格式Gerber命令详解.pdf

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Gerber RS-274X Format User’s Guide

Part Number 414 100 014 Rev D March, 2001 Copyright © Copyright 1998 Barco Graphics N.V., Gent, Belgium All rights reserved. This material, information and instructions for use contained herein are the property of Barco Graphics N.V. The material, information and instructions are provided on an AS IS basis without warranty of any kind. There are no warranties granted or extended by this document. Furthermore Barco Graphics N.V. does not warrant, guarantee or make any representations regarding the use, or the results of the use of the software or the information contained herein. Barco Graphics N.V. shall not be liable for any direct, indirect, consequential or incidental damages arising out of the use or inability to use the software or the information contained herein. The information contained herein is subject to change without prior notice. Revisions may be issued from time to time to advise of such changes and/or additions. No part of this document may be reproduced, stored in a data base or retrieval system, or published, in any form or in any way, electronically, mechanically, by print, photoprint, microfilm or any other means without prior written permission from Barco Graphics N.V. This document supersedes all previous dated versions. Trademarks All product names cited are trademarks or registered trademarks of their respective owners. Correspondence regarding this publication should be forwarded to: Barco ETS Tramstraat 69 B-9052 Gent For more information Barco ETS web site: www.barco.com/ets E-mail: etsinfo@barco.com Helpdesk Europe, Middle East, Africa, Latin America Monday - Thursday: 09.00 AM - 17.00 PM MET Friday: 09.00 AM - 16.00 PM MET +32 9 21 69 366 General support issues: etssupport.eur@barco.com License issues: etslicense.eur@barco.com Java™ HYPERTOOL issues: etshypertool@barco.com General information: etsinfo@barco.com Asia Pacific North America Contact your local dealer during support working hours Monday - Friday: 08:00 AM - 5:00 PM PST +1 (888) 727-9972 General support issues: etssupport.asp@barco.com License issues: etslicense.asp@barco.com Java™ HYPERTOOL issues: etshypertool@barco.com General information: etsinfo@barco.com General support issues: etssupport.usa@barco.com License issues: etslicense.usa@barco.com Java™ HYPERTOOL issues: etshypertool@barco.com General information: etsinfo@barco.com

Preface The information in this Guide was published previously as the Gerber Format Guide, which documented RS-274X format, also called Gerber Format, for both vector and raster devices. Acknowledging that vector plotting is rapidly becoming an outdated technology, this Guide describes use of RS-274X only in raster applications and eliminates codes that pertain to vector applications. This does not imply that existing files that include codes and parameters not described in this edition of the Guide will not work. The intent of this Guide is to describe and document uses of RS-274X format.

Contents INTRODUCTION .................................................................................................................................................. 1 Who should use this Guide? ..................................................................................................................................... 1 How to use this Guide............................................................................................................................................... 2 Related documentation.............................................................................................................................................. 2 Additional copies of the Guide ................................................................................................................................. 2 Where to go for help................................................................................................................................................. 2 RULES AND GUIDELINES.................................................................................................................................. 3 File structure ............................................................................................................................................................. 3 Data blocks........................................................................................................................................................... 3 Layers................................................................................................................................................................... 3 Data types............................................................................................................................................................. 4 RS-274X parameters................................................................................................................................................. 4 Directive parameters............................................................................................................................................. 5 Image parameters.................................................................................................................................................. 5 Aperture parameters ............................................................................................................................................. 5 Layer-specific parameters..................................................................................................................................... 6 Miscellaneous parameters..................................................................................................................................... 6 Standard RS-274D Codes and Coordinate Data ....................................................................................................... 7 General File Preparation Guidelines......................................................................................................................... 8 RS-274X Parameter Guidelines............................................................................................................................ 8 Table 1 RS-274X Parameter Order of Entry ........................................................................................................ 9 RS-274D Data Guidelines .................................................................................................................................. 10 Table 2 RS-274D Code Order of Entry.............................................................................................................. 10 Sample Files............................................................................................................................................................ 10 Example 1........................................................................................................................................................... 10 Example 2........................................................................................................................................................... 11 REFERENCE........................................................................................................................................................ 15 RS-274X parameters............................................................................................................................................... 15 AD - Aperture Definition ................................................................................................................................... 16 AM - Aperture Macro......................................................................................................................................... 19 AS - Axis Select ................................................................................................................................................. 25 FS - Format Statement........................................................................................................................................ 26 IF - Include File.................................................................................................................................................. 28 IJ - Image Justify ................................................................................................................................................ 29 IN - Image Name................................................................................................................................................ 30 IO - Image Offset................................................................................................................................................ 31 IP - Image Polarity ............................................................................................................................................. 32 IR - Image Rotate ............................................................................................................................................... 33 KO - Knockout ................................................................................................................................................... 34 LN - Layer Name................................................................................................................................................ 36 LP - Layer Polarity............................................................................................................................................. 37 MI - Mirror Image .............................................................................................................................................. 38 MO - Mode......................................................................................................................................................... 39 OF - Offset.......................................................................................................................................................... 40 PF - Plot Film ..................................................................................................................................................... 41 i

SF - Scale Factor................................................................................................................................................. 42 SR - Step and Repeat .......................................................................................................................................... 43 STANDARD RS-274D CODES............................................................................................................................ 45 D Codes................................................................................................................................................................... 45 Table 4 D Codes ................................................................................................................................................ 45 G Codes................................................................................................................................................................... 46 Table 5 G Codes ................................................................................................................................................ 46 Linear Interpolation (G01, G10, G11, G12) ....................................................................................................... 47 Circular Interpolation (G02, G03, G74, G75) .................................................................................................... 47 Multiquadrant (360°) Circular Interpolation (G74, G75) ................................................................................... 48 Polygon Area Fill (G36, G37) ............................................................................................................................ 49 M Codes.................................................................................................................................................................. 50 GLOSSARY........................................................................................................................................................... 51 INDEX.................................................................................................................................................................... 53 ii

Introduction Gerber data is a simple, generic means of transferring printed circuit board information to a wide variety of devices that convert the electronic PCB data to artwork produced by a photoplotter. Virtually every PCB CAD system generates Gerber data because all photoplotters read it. It is a software structure consisting of X,Y coordinates supplemented by commands that define where the PCB image starts, what shape it will take, and where it ends. In addition to the coordinates, Gerber data contains aperture information, which defines the shapes and sizes of lines, holes, and other features. Gerber Format, which is the format in which Gerber data is expressed, actually is a family of data formats that are subsets of EIA Standard RS-274D. Extended Gerber Format, which is also called RS-274X, provides enhancements that handle polygon fill codes, positive/negative image compositing, and custom apertures, and other features. RS-274X also encapsulates the aperture list in the header of the Gerber data file and therefore allows files to pass from one system to another without the need to re-input the aperture table. RS-274X produces a variety of Gerber data called X data. RS-274X is a superset of the EIA Standard RS-274D format. RS-274X supports some of the parameter data codes (G codes) and aperture codes (D codes) contained in RS-274D, as well as codes referred to as mass parameters. Mass parameters are plot parameters that define characteristics that can affect an entire plot, or only specific parts of the plot, called layers. Mass parameters extend the capabilities of Gerber Format. Their presence makes the Gerber data X data. Who should use this Guide? In order to use this Guide, you should have a fundamental understanding of PCB fabrication or PCB design and laser plotting concepts. This Guide is intended for use by: • PCB designers preparing data for conversion to RS-274X • PCB fabricators creating or using Gerber data files • Developers of software applications using RS-274X data 1

How to use this Guide You will find the following sections in this Guide: Rules and Guidelines explain file content and structure and outlines rules and guidelines for creating a correct RS-274X file. It also contains a sample file. Reference defines use and constraints on use of every RS-274X parameter and data code currently supported. Parameters and data codes are described separately. Both are presented in alphanumerical order. You will also find a Glossary and Index at the end of the Guide. Related documentation This Guide assumes you are familiar with Electronic Industries Association EIA Standard RS-274D. You can obtain a copy of this standard from the Electronic Industries Association, Engineering Department, 2001 Eye Street NW, Washington, DC 20006 USA. Where to go for help Should you need assistance, contact the Barco Graphics ETS North American Technical Assistance Center by telephone during normal business hours (eastern time) at (888) 727-9972, by fax at (860) 291-7021. 2

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