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E-raamat: PCB Design Using AutoCAD

  • Formaat: PDF+DRM
  • Sari: EDN Series for Design Engineers
  • Ilmumisaeg: 15-Sep-1997
  • Kirjastus: Newnes (an imprint of Butterworth-Heinemann Ltd )
  • Keel: eng
  • ISBN-13: 9780080514833
  • Formaat - PDF+DRM
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  • Formaat: PDF+DRM
  • Sari: EDN Series for Design Engineers
  • Ilmumisaeg: 15-Sep-1997
  • Kirjastus: Newnes (an imprint of Butterworth-Heinemann Ltd )
  • Keel: eng
  • ISBN-13: 9780080514833

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Recognizing that many small companies use their familiar AutoCAD to design circuit boards because they cannot afford either the acquisition costs nor the learning curve for a specialized software package, provides a tutorial on adapting the tools to the task. Assumes familiarity with AutoCAD, electronics, and schematic drafting. Includes a 3.5" disk for DOS or Windows 95 with a toolkit. No bibliography. Annotation c. by Book News, Inc., Portland, Or.

Designing PCBs is made easier with the help of today's sophisticated CAD tools, but many companies' requirements do not justify the acquisition cost and learning curve associated with specialized PCB design software. Printed Circuit Board Design Using AutoCAD helps design engineers and students get the most out of their AutoCAD workstation, showing tips and techniques to improve your design process. The book is organized as a series of exercises that show the reader how to draft electronic schematics and to design single-sided, double-sided, and surface-mount PCBs.Coverage includes drafting schematics, designing PCB artwork, and preparation of detailed fabrication and assembly drawings for PCBs designed on other EDA systems. Appendices on the Gerber and Excellon formats are vital information for anyone involved in professional PCB design. An introductory chapter gives an overview of PCB manufacturing technology and design techniquesIn addition to the tips and techniques, the author has provided a copy of AutoPADS, a proprietary toolkit for PCB designers using AutoCAD. The disk includes the AutoPADS conversion utilities, sample files for the book exercises, and AutoCAD libraries for schematic drafting and PCB design. The AutoPADS utilities allow bidirectional transfer of Gerber format photophlotter data and Excellon format numerical control (NC) drill data from AutoCAD. The AutoPADS utilities also allow input of Hewlett-Packard Graphics Language (HPGL) data from other computer-aided design systems into AutoCAD. ABOUT THE AUTHORChris Schroeder is the Chief Engineer, Electronics, for Crane Technologies Group, Inc., Daytona Beach, Florida, a leading automotive aftermarket and original equipment supplier. He has 19 years of engineering, marketing, and management experience in the electronics industry and has a broad, yet in-depth technical knowledge of both design and manufacturing. His specialized areas of design expertise include: embedded controls using RISC microcontroller technology, assembly language programming, magnetic design for switching power supplies and ignition coils, and printed circuit board design, including the use of surface mount technology.

Arvustused

" ' Aims to help Design engineers ans students to get the most from their AutoCAD workstation, showing tips and techniques for improving the design process Booknews

Muu info

Integrating PCB design with AutoCAD systems How to draft schematics and design PCBs Interfacing with Gerber, Excellon, and HPGL formats
Preface xv
Chapter
1. Introduction to PCB Design
1(36)
PCB Classifications
1(3)
PCB Manufacturing Considerations
4(11)
Solder Mask over Bare Copper Process
6(8)
Bare Board Electrical Test
14(1)
Historical Overview of PCB Design Techniques
15(7)
Introduction of Computer Aided Design and Manufacturing
16(1)
Photoplotting of PCB Artwork
17(1)
Numerically Controlled PCB Drilling
18(1)
Evolution of PCB Design Tools
19(2)
Impact of Manufacturing Requirements on PCB Design
21(1)
Application of AutoCAD for PCB Design
22(13)
Overview of the PCB Design Process Using AutoCAD
23(1)
Floor Planning Metrics
23(1)
PCB Design Rules
24(4)
Trace Width and Spacing Requirements
28(2)
Board Outline and Component Placement
30(2)
Routing Connections
32(3)
Final Steps in the Design Process and Postprocessing
35(1)
Conclusion
35(2)
Chapter
2. Schematic Drafting
37(42)
Introduction to Electronic Schematics
37(22)
Reference Designators
37(3)
Part Descriptions
40(3)
Symbols for Electronic Parts
43(13)
Special Schematic Symbols
56(3)
Preferred Schematic Drafting Practices
59(9)
Schematic Flow
59(2)
Signal Naming Conventions
61(2)
Title Block, Revision Block, and Notes
63(2)
Hidden IC Power Pins
65(2)
Schematic Organization and Planning
67(1)
Schematic Drafting Tutorial Exercise
68(9)
Drafting the Schematic
69(2)
Generating the Bill of Materials
71(3)
Importing Bill of Materials Files into Microsoft Excel
74(2)
Importing Schematic Graphics into Microsoft Word
76(1)
Guidelines for Drawing Schematics with AutoCAD
76(1)
Conclusion
77(2)
Chapter
3. Single Sided PCB Design
79(42)
Introduction to the Tutorial Design
79(4)
Structured Design Approach
83(8)
Pad Blocks
86(3)
Part Blocks
89(2)
Starting the Tutorial Exercise
91(8)
Setting Up Layers
92(1)
Drawing the Board Outline
93(1)
Placing Components
94(2)
Trace Routing
96(3)
Introduction to the AutoPADS Utilities
99(1)
Manufacturing Documentation
99(8)
Extracting NC Drill Data
99(3)
Running AutoDRIL to Generate Excellon Data
102(1)
AutoDRIL Conversion Options
102(1)
X and Y Offset Entry
103(1)
CDF Filename Entry
103(1)
AutoDRIL Error Messages
104(1)
AutoDRIL Limitations
104(1)
Examining the Excellon NC Drill Data File
104(1)
Drill Detail Drawing
105(2)
Assembly Drawing
107(1)
Board Artwork
107(10)
AutoCAD Configuration
109(1)
AutoCAD Limitations
110(1)
AutoCAD Binary ADI Plotting Considerations
111(1)
Gerber Output from AutoPADS
111(1)
Aperture Assignments
112(1)
Plotting and Conversion Considerations
112(1)
Generating the Binary ADI Plot Files
113(1)
Silkscreen Artwork
114(1)
Solder Side Artwork
114(1)
Solder Mask Artwork
114(1)
Running AutoPADS to Generate Gerber Data
115(1)
ADI Resolution Setup
115(1)
Binary ADI Plot Filename Entry
116(1)
AutoPADS Error Messages
116(1)
Converting the Plot Files with AutoPADS
116(1)
Sending Files to a Service Bureau
117(3)
Drill Detail Drawing File
118(1)
PCB README.DOC File
118(2)
Compressing Files with PKZIP
120(1)
Conclusion
120(1)
Chapter
4. Double Sided PCB Design
121(32)
Introduction to the Tutorial Design
121(4)
Structured Design Approach
125(1)
Starting the Tutorial Exercise
126(18)
Rules for Lead Spacing, Hole Diameter, and Pad Size
127(2)
Creating a New Pad Block
129(5)
Creating a New Part Block
134(3)
Setting Up Layers
137(1)
Drawing the Board Outline
138(1)
Placing Components
138(3)
Trace Routing
141(3)
Using the AutoPADS Utilities
144(1)
Manufacturing Documentation
145(3)
Extracting NC Drill Data and Running AutoDRIL
145(1)
Drill Detail and Assembly Drawings
145(3)
Board Artwork
148(1)
Preparing Files for a Service Bureau
149(2)
Conclusion
151(2)
Chapter
5. Surface Mount PCB Design
153(34)
Introduction to the Tutorial Design
155(2)
Structured Design Approach for SMT
157(9)
SMT Pads
160(5)
SMT Part Blocks
165(1)
Recommended SMT Design Practices
166(2)
Starting the Tutorial Exercise
168(7)
Setting Up Layers
168(1)
Drawing the Board Outline
169(1)
Placing Components
170(2)
Trace Routing
172(3)
Using the AutoPADS Utilities
175(1)
Manufacturing Documentation
176(3)
Extracting NC Drill Data and Running AutoDRIL
176(1)
Drill Detail and Assembly Drawings
176(3)
Board Artwork
179(4)
Silkscreen Artwork
181(1)
Component and Solder Side Artwork
181(1)
Solder Mask Artwork
182(1)
SMT Solder Paste Artwork
182(1)
Preparing Files for a Service Bureau
183(2)
Conclusion
185(2)
Chapter
6. Importing Gerber Files for Manufacturing Documentation
187(24)
Obtaining Gerber Data
187(1)
AutoCAD DXB and DXF Format
188(1)
Starting the DXB Tutorial Exercise
189(1)
Using the GBR2DXB Conversion Utility
190(4)
Gerber Format Setup
191(1)
AutoCAD Layer Setup
191(1)
Layer Names by D Code Option
191(1)
Gerber Filename Entry
191(1)
Conversion Process
191(1)
Batch Conversion
192(1)
Stopping the Program
192(1)
Error Messages
192(1)
Common Problems
193(1)
Scale Factor Problems
193(1)
Correcting the Origin for Imported Data
193(1)
Editing Text in Imported Data
193(1)
Accuracy Limitations
193(1)
Completing the DXB Tutorial Exercise
194(5)
Preparing the Drill Detail Drawing from DXB Data
195(2)
Preparing the Assembly Drawing from DXB Data
197(2)
Starting the DXF Tutorial Exercise
199(1)
Using the GBR2DXF Conversion Utility
200(5)
Aperture Assignments
201(1)
Creating a New Aperture File
201(1)
Editing an Aperture File
201(1)
Gerber Format Setup
202(1)
Gerber Filename Entry
202(1)
AutoCAD Layer Setup
203(1)
Conversion Options
203(1)
Conversion Process
203(1)
Stopping the Program
203(1)
Error Messages
204(1)
Common Problems
204(1)
Scale Factor Problems
204(1)
Correcting the Origin for Imported Data
205(1)
Editing Text in Imported Data
205(1)
Accuracy Limitations
205(1)
Completing the DXF Tutorial Exercise
205(4)
Preparing the Drill Detail Drawing from DXF Data
207(2)
Preparing the Assembly Drawing from DXF Data
209(1)
Conclusion
209(2)
Chapter
7. Importing HPGL Files for Manufacturing Documentation
211(24)
Obtaining HPGL Data
211(1)
Overview of HPGL Data Format
212(1)
AutoCAD DXB and DXF Format
212(1)
Starting the DXB Tutorial Exercise
213(1)
Using the HPGL2DXB Conversion Utility
214(3)
Linetype Conversion Options
214(1)
HPGL Filename Entry
215(1)
Conversion Process
215(1)
Batch Conversion
215(1)
Stopping the Program
216(1)
Error Messages
216(1)
Common Problems
216(1)
Scale Factor Problems
216(1)
Correcting the Origin for Imported Data
217(1)
Editing Text in Imported Data
217(1)
Accuracy Limitations
217(1)
Completing the DXB Tutorial Exercise
217(6)
Preparing the Drill Detail Drawing from DXB Data
218(3)
Preparing the Assembly Drawing from DXB Data
221(2)
Starting the DXF Tutorial Exercise
223(1)
Using the HPGL2DXF Conversion Utility
224(4)
Text Conversion Parameters
224(1)
Linetype Conversion Options
225(1)
HPGL Filename Entry
225(1)
Conversion Process
226(1)
Batch Conversion
226(1)
Stopping the Program
226(1)
Error Messages
227(1)
Common Problems
227(1)
Setting Up AutoCAD Text Styles
227(1)
Scale Factor Problems
227(1)
Correcting the Origin for Imported Data
228(1)
Editing Text in Imported Data
228(1)
Accuracy Limitations
228(1)
Completing the DXF Tutorial Exercise
228(4)
Preparing the Drill Detail Drawing from DXF Data
230(1)
Preparing the Assembly Drawing from DXF Data
231(1)
HPGL Data Capture via Plotter Eavesdropping
232(1)
Fabricating the RS-232 Eavesdropping Cable
232(1)
Eavesdropping with PROCOMM PLUS
232(1)
Conclusion
233(2)
Chapter
8. Importing Gerber Artwork Files for Viewing
235(18)
Obtaining Gerber Data
235(1)
AutoCAD DXF Format
236(1)
Starting the Tutorial Exercise
236(1)
Using the GBR2DXF Conversion Utility
237(6)
Aperture Assignments
238(1)
Creating a New Aperture File
238(1)
Editing an Aperture File
239(1)
Gerber Format Setup
240(1)
Gerber Filename Entry
240(1)
AutoCAD Layer Setup
240(1)
Conversion Options
240(1)
Conversion Process
241(1)
Stopping the Program
241(1)
Error Messages
241(1)
Common Problems
241(1)
Scale Factor Problems
242(1)
Correcting the Origin for Imported Data
242(1)
Editing Text in Imported Data
242(1)
Accuracy Limitations
242(1)
Completing the Tutorial Exercise
243(7)
Viewing Converted Artwork Files in AutoCAD
246(2)
Artwork Display Limitations
248(1)
Measuring Clearances between Artwork Features
249(1)
Creating Aperture Blocks
250(1)
Conclusion
251(2)
Chapter
9. Importing Excellon Format NC Drill Data
253(10)
Obtaining Excellon Data
253(1)
AutoCAD DXF Format
254(1)
Starting the Tutorial Exercise
254(1)
Using the CNC2DXF Conversion Utility
255(3)
Excellon Format Setup
256(1)
Excellon Filename Entry
256(1)
Conversion Process
256(1)
Stopping the Program
256(1)
Error Messages
256(1)
Common Problems
257(1)
Scale Factor Problems
257(1)
Correcting the Origin for Imported Data
257(1)
Accuracy Limitations
257(1)
Completing the Tutorial Exercise
258(3)
Importing the Converted NC Drill Data into AutoCAD
259(2)
Measuring Distances between Features
261(1)
Creating Tool Blocks
261(1)
Conclusion
261(2)
Chapter
10. Converting HPGL to Gerber Format
263(20)
Introduction to the Tutorial
263(1)
Structured Design Approach
264(7)
Pad Blocks
267(2)
Part Blocks
269(1)
Trace Width Considerations
270(1)
Completing the Tutorial Exercise
271(1)
Manufacturing Documentation
271(1)
Board Artwork
271(10)
AutoCAD HPGL Plot Driver Configuration
271(1)
AutoCAD Limitations
272(1)
AutoCAD HPGL Plotting Considerations
272(1)
Gerber Output from HPGL2GBR
273(1)
Aperture Assignments
273(1)
Plotting and Conversion Considerations
274(1)
Generating the HPGL Plot Files
275(1)
Silkscreen Artwork
276(1)
Component Side Artwork
276(1)
Solder Side Artwork
277(1)
Solder Mask Artwork
278(1)
Running HPGL2GBR to Generate Gerber Data
279(1)
X and Y Offset Entry
280(1)
HPGL Plot Filename Entry
280(1)
Conversion Process
280(1)
Stopping the Program
281(1)
Error Messages
281(1)
Common Problems
281(1)
Converting the Plot Files
281(1)
Conclusion
281(2)
Appendix A. Gerber Format
283(6)
Overview
283(1)
Gerber Photoplotter Format
283(2)
Aperture Assignments
285(1)
Image Quality Issues with AutoPADS and HPGL2GBR
285(1)
Some Helpful Photoplotting Hints
286(1)
Determining the Gerber Format of an Unknown File
286(1)
Corrupt Gerber Files
287(2)
Appendix B. Excellon Format
289(2)
Overview
289(1)
Excellon NC Drill Data Format
289(1)
Tool Assignments
290(1)
Appendix C. HPGL Format
291(10)
Overview
291(1)
HPGL Command Summary
291(4)
Commands Supported by HPGL2DXB and HPGL2DXF
295(2)
Plot Setup
295(1)
Graphics Entities
295(1)
Text Entities
296(1)
Text Fonts
296(1)
Select Pen Command
296(1)
Linetype Command
297(1)
Commands Supported by HPGL2GBR
297(1)
Plot Setup
298(1)
Graphics Entities
298(1)
Text Entities
298(1)
Problems with Multiple Frames in a Plot File
298(1)
Corrupt HPGL Files
299(2)
Appendix D. Information about the Disk Supplied with the Book
301(8)
Disk Contents
301(1)
Requirements and Compatibility
301(1)
Shareware List Utility
302(1)
Shareware Data Compression Utilities
302(1)
Schematic Symbol Library
303(2)
PCB Parts Libraries
305(4)
Index 309