Allegro® PCB Editor Basic Techniques Course Version 16 6 QIR8 Lab Manual Revision 1 0 2 February 9, 2015 © 1990 2015 Cadence Design Systems, Inc All rights reserved Printed in the United States of Ame.
Allegro® PCB Editor Basic Techniques Course Version 16.6 QIR8 Lab Manual Revision 1.0 © 1990-2015 Cadence Design Systems, Inc All rights reserved Printed in the United States of America Cadence Design Systems, Inc (Cadence), 2655 Seely Ave., San Jose, CA 95134, USA Trademarks: Trademarks and service marks of Cadence Design Systems, Inc (Cadence) contained in this document are attributed to Cadence with the appropriate symbol For queries regarding Cadence trademarks, contact the corporate legal department at the address shown above or call 1-800-862-4522 All other trademarks are the property of their respective holders Restricted Print Permission: This publication is protected by copyright and any unauthorized use of this publication may violate copyright, trademark, and other laws Except as specified in this permission statement, this publication may not be copied, reproduced, modified, published, uploaded, posted, transmitted, or distributed in any way, without prior written permission from Cadence This statement grants you permission to print one (1) hard copy of this publication subject to the following conditions: The publication may be used solely for personal, informational, and noncommercial purposes; The publication may not be modified in any way; Any copy of the publication or portion thereof must include all original copyright, trademark, and other proprietary notices and this permission statement; and Cadence reserves the right to revoke this authorization at any time, and any such use shall be discontinued immediately upon written notice from Cadence Disclaimer: Information in this publication is subject to change without notice and does not represent a commitment on the part of Cadence The information contained herein is the proprietary and confidential information of Cadence or its licensors, and is supplied subject to, and may be used only by Cadence customers in accordance with, a written agreement between Cadence and the customer Except as may be explicitly set forth in such agreement, Cadence does not make, and expressly disclaims, any representations or warranties as to the completeness, accuracy or usefulness of the information contained in this document Cadence does not warrant that use of such information will not infringe any third party rights, nor does Cadence assume any liability for damages or costs of any kind that may result from use of such information Restricted Rights: Use, duplication, or disclosure by the Government is subject to restrictions as set forth in FAR52.227-14 and DFAR252.227-7013 et seq or its successor February 9, 2015 Table of Contents Allegro PCB Editor Basic Techniques Module 1: About This Course Lab 1-1 Locating Cadence Online Support Solutions 11 Cadence Online Support (COS) 11 Product Search 12 Lab 1-2 Customizing Notification and Search Preferences 13 Product Preferences 13 Module 2: User Interface 15 Lab 2-1 Taking an Allegro PCB Editor Tour 17 Choosing Products and Starting Allegro PCB Editor 17 Setting Your Working Directory, Opening a Board Design, and Viewing Tool Sets 18 Exploring the Allegro PCB Editor User Interface 19 Accessing the Help System 21 Lab 2-2 Navigating the Allegro PCB Editor User Interface 22 Using a Pop-Up Menu and View Panning 22 Using the View Command and Zoom Options 22 Using the Middle Mouse Button to Zoom In and Out 23 Using the WorldView Window 24 Using Strokes 25 Customizing Your View and Toolset 26 Choosing Drawing Options 27 Changing the Mouse Pointer Appearance with User Preferences 28 Module 3: Management of the Allegro PCB Editor Work Environment 31 Lab 3-1 Using Script Files to Control Visibility and Color 33 Starting a Script File Recorder 33 Controlling Visibility 34 Controlling Colors 35 Stopping the Script File Recorder 36 Testing the Script File (colors.scr) 36 Setting Colors Using the Import/Export – Parameters Command 37 Using the Shadow Mode Option 38 Lab 3-2 Coloring and Using the Find Filter 40 Locating a Component Using the Find By Name Section 40 Using the Selectable Objects List 41 Using the Pre-Selection Mode 42 Finding Items by Property 43 Coloring Objects in a Design 44 Lab 3-3 Using the Find Filter with the Show Element Command 46 Using the Show – Element Command 46 Using the Display – Measure Command 48 Module 4: Lab 4-1 PCB Editor Initialization 49 Managing the User Environment 51 Changing the Dynamic Zoom 51 Cadence Design Systems, Inc Search Path Variables 53 Lab 4-2 Module 5: Padstacks 57 Lab 5-1 Creating a Flash Symbol 59 Starting in Symbol Edit Mode 59 Setting the Design Parameters 60 Creating the Thermal Relief 61 Saving the Symbol to Disk 62 Lab 5-2 Creating Padstacks for a Through-Hole Pin Device 63 Starting the Padstack Editor 63 Creating the Padstack in the Correct Directory 63 Describing the NCDRILL Requirements 64 Describing the BEGIN LAYER Pad 65 Describing the DEFAULT INTERNAL and END LAYER Pads 66 Defining the Thermal Flash 67 Describing the SOLDERMASK Pads 68 Describing BEGIN LAYER and END LAYER Pads for Pin 69 Describing the SOLDERMASK Pads 70 Saving the Padstack to Disk 70 Lab 5-3 Creating a Padstack for a Surface-Mounted Device 72 Naming the Padstack 72 Describing the BEGIN LAYER Pad 72 Describing the SOLDERMASK Pad 73 Describing the PASTEMASK Pad 73 Saving the Padstack to Disk 74 Module 6: Customizing the PCB Editor User Interface 55 Using Function Keys 55 Using Typed Aliases 56 Removing a Defined Alias 56 Component Symbols 75 Lab 6-1 Creating a DIP16 Package Using the Package Symbol Wizard 77 Naming the Symbol 77 Using the Package Symbol Wizard 78 Lab 6-2 Creating a DIP14 Package Symbol 81 Starting in Symbol Edit Mode 81 Setting the Design Parameters 82 Adding Pins 82 Adding an Assembly Outline 85 Adding a Silkscreen Outline 86 Setting Colors 87 Adding Labels 88 Creating a Package Boundary 90 Defining the Package Height 90 Saving the Symbol to Disk 91 Lab 6-3 Creating an SOIC16 with the Symbol Editor (Optional Lab) 92 Naming the Symbol 92 Setting the Grid 92 Cadence Design Systems, Inc Adding Pins 93 Adding an Assembly Outline 95 Adding a Silkscreen Outline 95 Adding Labels 96 Creating the Package Symbol and Drawing Files (.psm and dra) 97 Module 7: Board Design Files 99 Lab 7-1 Creating a Board Mechanical Symbol 101 Naming the Symbol 101 Setting the Grid 103 Creating the Board Outline 104 Adding Tooling Holes 105 Chamfering Corners 106 Adding Linear Dimensions 108 Dimensioning a Chamfer 110 Adding Placement and Routing Keepin Areas 112 Adding Placement and Routing Keepout Areas 114 Adding Via Keepout Areas 115 Creating the Mechanical Symbol and Drawing Files 116 Lab 7-2 Creating a Master Design File (.brd) 118 Setting Drawing Parameters 118 Adding the Mechanical Symbol 119 Adding Format Symbols 121 Adding Package Symbols 122 Setting Color and Visibility 123 Defining the Cross Section (Layer Stackup) 124 Saving Your Board Template 126 Module 8: Importation of Logic Information into the PCB Editor 127 Lab 8-1 Reading Design Entry HDL into the PCB Editor 129 Starting the Project Manager 129 Opening the Project 130 Synchronizing the Schematic Logic with the Physical Board 131 Lab 8-2 Reading Design Entry CIS into the PCB Editor 134 Importing the DE CIS File 134 Lab 8-3 Importing a Third-Party Netlist 137 Opening the master.brd File 137 Module 9: Design Constraints 141 Lab 9-1 Setting Physical Rules 143 Setting the Default Physical Rules 143 Defining the Special Physical Rules 144 Identifying the Special Physical Nets 144 Assigning the Net Class 145 Lab 9-2 Setting Spacing Rules 147 Setting the Default Spacing Rules 147 Defining the Special Spacing Rules 148 Assigning the Net Class 149 Cadence Design Systems, Inc Lab 9-3 Setting Class-Class Rules 150 Defining a New Spacing Rule 150 Assigning Nets to a New Net Class 151 Creating the Class-Class Rule 152 Lab 9-4 Working with Properties 155 Attaching Properties to Components 155 Attaching Fixed Properties to Symbols Using Icons 157 Adding the ROOM Property to Components 157 Attaching Properties to Nets 159 Showing Existing Properties on Elements in the Design 161 Deleting Properties 162 Module 10: Component Placement 165 Lab 10-1 Creating a Floorplan 167 Starting in the Work Directory 167 Setting the Non-Etch Grid 167 Adding Rooms 168 Lab 10-2 Assigning Preplaced Packages 171 Lab 10-3 Placing Components Manually 173 Placing Parts by Reference Designator 173 Coloring the GND and VCC Nets 175 Changing the Default Orientation 176 Moving Parts 178 Moving Groups of Parts 178 Lab 10-4 Using Quickplace and the Replicate Circuit Functionality 180 Preparing for Placement 180 Placing the Chan2 Room 181 Creating the Replicated Circuit and Applying It to Chan1 Room 182 Quickplacing the Rest of the Rooms 186 Quickplacing the Remaining Active Component 188 Generating Reports 191 Lab 10-5 Removing Components from the Board 194 Deleting Parts from the Design 194 Module 11: Lab 11-1 Displaying Ratsnests 197 Working with Ratsnests 197 Lab 11-2 Advanced Placement with ALT_SYMBOL (Optional) 199 Using the ALT_SYMBOL Property 199 Module 12: Advanced Placement 195 Routing 201 Lab 12-1 Defining Etch Grids 203 Defining Grids 203 Lab 12-2 Adding and Deleting Connect Lines and Vias 205 Deleting Etch 207 Using the Pre-Select Mode 208 Inserting Vias 209 Using the Bubble Options 210 Cadence Design Systems, Inc Routing with the Working Layer Environment 212 Lab 12-3 Preparing for Autorouting 214 Making the Plane Layers Visible 214 Creating the Shape for the VCC Power Layer 215 Creating the Shape for the Ground Layer and Assigning the GND Net 217 Saving Your Work 219 Lab 12-4 Using the PCB Router 220 Preserving Preroutes into the PCB Router 220 Running the PCB Router 221 Lab 12-5 Checking for Unconnected Pins 224 Using Rats 224 Using the Report Command 224 Final Editing 225 Lab 12-6 Improving Routed Connections 226 Using Slide 226 Lab 12-7 Replacing Etch and Using the Cut Option 229 Using the Replace Etch Option 229 Using Cut with Delete 230 Using Cut with Slide 230 Using Cut to Change Width 231 Module 13: Lab 13-1 Module 14: Copper Areas and Positive or Negative Planes 233 Working with Copper Areas 235 Setting Up for Embedded Planes 235 Setting Up for Thermal Pad Display 235 Editing the GND Plane 237 Deleting Islands 238 Creating Copper Void Areas 239 Preparation for Postprocessing 241 Lab 14-1 Renaming Components 243 Setting up for Rename 243 Setting Colors and Visibility 244 Renaming Components 245 Interactively Renaming Parts 247 Lab 14-2 Backannotating PCB Editor Files to DE HDL 248 Creating the Backannotation Files for DE HDL 248 Lab 14-3 Backannotating PCB Editor Files to DE CIS 250 Creating the Backannotation Files for Capture CIS 250 Lab 14-4 Backannotating from PCB Editor Files to a Third Party Schematic 251 Creating the Backannotation Files for a Third-Party Schematic 251 Module 15: Lab 15-1 Preparation of the Board Design for Manufacturing 253 Creating a Silkscreen 255 Setting Visibility 255 Running the Autosilk Program 256 Editing the Silkscreen 257 Cadence Design Systems, Inc Lab 15-2 Creating Reports 258 Running the Report Command 258 Lab 15-3 Creating Artwork Files 259 Setting Manufacturing File Parameters 259 Setting Up Film Control Records 260 Creating New Film Control Records 262 Creating the Soldermask Top Film Control Record 263 Creating the Soldermask Bottom Film Control Record 263 Running DRC 264 Saving the Design File 265 Creating the Manufacturing Files 265 Lab 15-4 Viewing Gerber Files 267 Starting a New Design for Viewing 267 Creating a New Subclass for the Artwork 268 Loading the Artwork Files into PCB Editor 268 Lab 15-5 Creating a Drill Legend 270 Opening the Final Design File 270 Setting Visibility 270 Creating Drill Symbols and Legend 271 Lab 15-6 Creating Fabrication and Assembly Drawings 272 Creating a Fabrication Drawing 272 Creating an Assembly Drawing 272 Lab 15-7 Creating Fabrication and Assembly Drawings 274 Creating an NC DRILL File 274 Cadence Design Systems, Inc Module 1: About This Course © 2015 Cadence Design Systems, Inc All rights reserved Preparation of the Board Design for Manufacturing Click OK to close the form When you close the Artwork Control form, the parameter settings are written to a file called art_param.txt in the working directory Setting Up Film Control Records Each layer for which you want to create artwork must be entered into an Artwork Film Control table By default, the PCB Editor software will create a film control record for each of the etch subclasses in the design Choose Manufacture − Artwork from the top menu to open the Artwork Control Form, if it isn’t already open Click the Film Control tab in the Artwork Control Form This form specifies which artwork files are to be created and which objects in the PCB Editor database constitute each artwork file Notice that, by default, there are four entries in the Available Films window of the Artwork Control form There is one entry for each of the etch subclasses of your design Click the plus + sign to the left of the BOTTOM entry in the Available Films window of the Artwork Control form The BOTTOM film control record expands to display the class/subclass entries that will be included in the manufacturing file for this artwork film By default, the PCB Editor software includes the ETCH, PIN, and VIA class for each of the etch subclasses Set the Undefined Line Width field to 10 in the Film Options section of the Artwork Control form Click the GND film control record in the Available Films section of the Artwork Control form (Click on the word GND.) The Film Options section of the Artwork Control form now shows the film options for the GND film record Set the Undefined Line Width field to 10 in the Film Options section of the Artwork Control form Check to make sure the Plot mode is set to Positive It is a good idea to make sure that the plot mode is set correctly on Plane layers 260 © 2015 Cadence Design Systems, Inc All rights reserved Preparation of the Board Design for Manufacturing Click the IS1 film control record in the Available Films section of the Artwork Control form (Click the word IS1.) The Film Options section of the Artwork Control form now shows the film options for the IS1 film record Set the Undefined Line Width field to 10 in the Film Options section of the Artwork Control form 10 Click the IS2 film control record in the Available Films section of the Artwork Control form (Click the word IS2.) The Film Options section of the Artwork Control form now shows the film options for the IS2 film record 11 Set the Undefined Line Width field to 10 in the Film Options section of the Artwork Control form 12 Click the TOP film control record in the Available Films section of the Artwork Control form (Click the word TOP.) The Film Options section of the Artwork Control form now shows the film options for the TOP film record 13 Set the Undefined Line Width field to 10 in the Film Options section of the Artwork Control form 14 Click the VCC film control record in the Available Films section of the Artwork Control form (Click the word VCC.) The Film Options section of the Artwork Control form now shows the film options for the VCC film record 15 Set the Undefined Line Width field to 10 in the Film Options section of the Artwork Control form 16 Verify the Plot Mode field is set to Negative in the VCC Film Options section of the Artwork Control form © 2015 Cadence Design Systems, Inc All rights reserved 261 Preparation of the Board Design for Manufacturing Creating New Film Control Records You also need to create artwork files for your soldermask layers and your silkscreen layer You need to create a film control record for each of these By default, when you create a new film control record, all currently visible classes and subclasses are added to the film control record Note: Do not close the Artwork Control Form until told to so Choose Display − Color/Visibility from the top menu Toggle on the Enable Auto Apply option so that when you make changes in the color form the design is updated automatically Click the Global Visibility Off button field to make invisible all classes and subclasses Click Yes when asked to confirm that you will be changing the visibility of all classes Click the Manufacturing folder Turn on the AUTOSILK_TOP subclass and click Apply to redisplay the color settings and leave the Color and Visibility form open In the Film Control tab, right-click on the VCC film control record in the Available Films section of the Artwork Control form and select Add A text form opens, asking for the name of the new film Enter a name of SILK_TOP and click OK A new film control record is added Click the SILK_TOP film control record in the Available Films section of the Artwork Control form (Click the word SILK_TOP.) The Film Options section of the Artwork Control form now shows the film options for the SILK_TOP film record 10 Set the Undefined Line Width field to 10 in the Film Options section of the Artwork Control form 262 © 2015 Cadence Design Systems, Inc All rights reserved Preparation of the Board Design for Manufacturing Creating the Soldermask Top Film Control Record Choose Display − Color/Visibility from the top menu if the Color Dialog form is not already open Click the Global Visibility Off button field to make invisible all classes and subclasses Click Yes when asked to confirm Click the Stack-Up/Non-Conductor folder Turn on PIN/SOLDERMASK_TOP and VIA/SOLDERMASK_TOP Click Apply to redisplay the color settings and leave the Color and Visibility form open In the Available Films section of the Artwork Control form, right-click on the SILK_TOP film control record and select Add from the menu A text form opens, asking for the name of the new film Enter a name of SOLDER_TOP and click OK A new film control record is added Click the SOLDER_TOP film control record in the Available Films section of the Artwork Control form (Click on the word SOLDER_TOP.) The Film Options section of the Artwork Control form now shows the film options for the SOLDER_TOP film record 10 Set the Undefined Line Width field to 10 in the Film Options section of the Artwork Control form Creating the Soldermask Bottom Film Control Record Choose Display − Color/Visibility from the top menu if the Color Dialog form is not already open Click the Global Visibility Off button field to make invisible all classes and subclasses © 2015 Cadence Design Systems, Inc All rights reserved 263 Preparation of the Board Design for Manufacturing Click Yes when asked to confirm Click the Stack-Up/Non-Conductor folder Turn on PIN/SOLDERMASK_BOTTOM and VIA/SOLDERMASK_BOTTOM Click OK to redisplay the color settings and close the form In the Available Films section of the Artwork Control form, right-click on the SOLDER_TOP film control record and select Add from the menu A text form opens, asking for the name of the new film Enter a name of SOLDER_BOT and click OK A new film control record is added Click the SOLDER_BOT film control record in the Available Films section of the Artwork Control form (click on the work SOLDER_BOT) The Film Options section of the Artwork Control form now shows the film options for the SOLDER_BOT film record 10 Set the Undefined Line Width field to 10 in the Film Options section of the Artwork Control form 11 Click OK to close the Artwork Control form Running DRC Before you create artwork files, make sure your design has no DRC errors Choose Display – Status from the top menu The Status window appears In the window, the DRC errors might display an “Out Of Date” message The color box will be red If that is the case, perform the following step Click Update DRC The Editor message area reports: Performing DRC Please wait When the DRC check is completed, the color box will turn yellow or green, depending on whether or not you have DRCs to report Click OK to close the Status form 264 © 2015 Cadence Design Systems, Inc All rights reserved Preparation of the Board Design for Manufacturing If any DRCs are created, correct them before creating the artwork In the Color and Visibility form, turn the DRC class ON (under the Stack-Up folder) to locate the DRCs Choose Tools − Reports and double-click the Design Rules Check Report to create a DRC check report to give you information on where to look to clean up the design rule violations made on the board Saving the Design File Choose File − Save from the top menu A window appears and warns you that the final.brd file already exists It asks if you want to overwrite the file Click Yes to confirm the overwrite The final.brd file is written to disk Creating the Manufacturing Files Choose Manufacture − Artwork from the top menu The Artwork Control form opens Click the Film Control tab in the Artwork Control form The check box to the left of each film control record controls whether a manufacturing file is created for that record Because you want to generate all artwork files, click Select All below the Available Films window Click Create Artwork in the Artwork Control form At the bottom of the Artwork Control form, a message is displayed: Plot generated The Gerber format artwork files are written to your current working directory You can use Windows Explorer or the UNIX ls command to check for these files Each artwork file has the same extension (top.art, gnd.art, vcc.art) These are the plot files that create the film required for manufacturing the board Click Viewlog to see the photoplot.log file if is it not displayed automatically Check to make sure all artwork files have been created successfully This is a great file to send to your vendor along with the set of artwork files © 2015 Cadence Design Systems, Inc All rights reserved 265 Preparation of the Board Design for Manufacturing Click Close to close the log file Click OK in the Artwork Control form to close the form 266 © 2015 Cadence Design Systems, Inc All rights reserved Preparation of the Board Design for Manufacturing Lab 15-4 Viewing Gerber Files Objective: To use the Gerber files produced from the completed board, you preview them before plotting by loading the artwork files and looking at them in a new PCB Editor file Starting a New Design for Viewing Choose File − New A window appears and asks you if you want to save the final.brd file before creating a new design Click Yes to save the changes The final.brd file is written to disk The New Drawing window appears Enter the following name in the Drawing Name field: viewgerber This command creates a new layout drawing called viewgerber.brd Click OK in the New Drawing window to open the new design viewgerber.brd Choose Setup − Design Parameters The Design Parameter Editor form opens In the Design tab, use the scroll button in the Size field, and click C In the Design tab, use the scroll button in the Accuracy field, and click © 2015 Cadence Design Systems, Inc All rights reserved 267 Preparation of the Board Design for Manufacturing Click OK to close the form Creating a New Subclass for the Artwork If you load the artwork on the Class/Subclass pair Etch/Top, all of the line draws are seen as etch and will therefore be subject to the standard DRC settings such as line-to-line, and so forth You create a new subclass under the Manufacturing class to load all of the artwork into Choose Setup − Subclasses from the top menu Click the box next to Manufacturing In the New Subclass field, enter ARTWORK Press the Enter or Return key after entering the new subclass name Click OK in the Define Subclasses form You are ready to load your artwork Loading the Artwork Files into PCB Editor Choose File − Import − Artwork from the top menu The Load Photoplot form appears Set the Class field to MANUFACTURING using the pull-down menu Set the Subclass field to ARTWORK using the pull-down menu if it is not currently selected Click Browse In the file browser window click TOP.art, and click Open The entire path appears in the File Name field Click Load File A rectangle now attaches to your mouse pointer This represents the outline of the plot you are about to place Move the mouse pointer near the upper left area of the blank screen, and left- click The artwork image appears 268 © 2015 Cadence Design Systems, Inc All rights reserved Preparation of the Board Design for Manufacturing Repeat the preceding steps through to import the other etch layer artwork files you have created (vcc.art, gnd.art, is1.art, is2.art, and bottom.art) Click OK to close the Load Photoplot window Zoom in to view the artwork layers Notice the difference between the positive and negative image planes The database for this course includes the flash symbols (.fsm files) that let you see flash features while viewing Gerber files in the PCB Editor When you load an artwork layer that contains flash names (defined in your padstack data), the PCB Editor uses the PSMPATH to locate corresponding flash symbols (The fsm files must have the same name as the flash.) 10 Do NOT save this file © 2015 Cadence Design Systems, Inc All rights reserved 269 Preparation of the Board Design for Manufacturing Lab 15-5 Creating a Drill Legend Objective: To generate drill symbols and a drill legend for a fabrication drawing Opening the Final Design File Choose File − Open A warning is issued and you are asked whether you want to save the existing viewgerber.brd file Click No to the warning A file browser window opens Click the final.brd file and click Open to close the browser The final.brd file appears in the work area Setting Visibility Choose Display − Color/Visibility from the top menu Click the Global Visibility field Off to make all classes and subclasses invisible Click Yes when asked to confirm Click the Board Geometry folder Turn ON Assembly_Notes, Outline and Dimension subclasses Click the Drawing Format folder and turn ON all items in that class by clicking the All box Click OK to close the Color Dialog form Choose View − Zoom World from the top menu 270 © 2015 Cadence Design Systems, Inc All rights reserved Preparation of the Board Design for Manufacturing Creating Drill Symbols and Legend Choose Manufacture − NC − Drill Legend from the top menu The Drill Legend menu appears You can change the Legend Title from DRILL CHART Accept all remaining defaults and click OK When processing is complete, a rectangle is attached to your pointer, and the PCB Editor message area prompts you to pick a location for the legend information Place the legend down within the format drawing and outside the board outline Take a look at the Drill Legend you placed It is a drill chart for the pins that traverse from the Top layer of the board to the Bottom If you work with blind or buried vias, then a different drill chart appears for each legal layer combination Also note the drill symbols in your design representing the through holes Choose File − Viewlog to see the log file Click Close to close the log file Choose File − Save from the top menu A window appears and warns you that the final.brd file already exists It asks if you want to overwrite the file Click Yes to confirm the overwrite The final.brd file is written to disk © 2015 Cadence Design Systems, Inc All rights reserved 271 Preparation of the Board Design for Manufacturing Lab 15-6 Creating Fabrication and Assembly Drawings Objective: Creating Fabrication and Assembly Drawings Creating a Fabrication Drawing In the Options window, set the Active Class and Subclass fields to Drawing Format / Title_Data Choose Add − Text from the top menu In the Options tab, double-click in the Text Block area, and enter: 14 Make sure the Rotate field is set to In the PCB Editor work area, click in the title block (lower right corner of the drawing format), and enter your name Right-click and select Done If you zoom in to this, be sure you zoom back out before going to the next step, because whatever is in the work area gets passed to the plot file At this point, you can print what you have currently displayed in the PCB Editor screen to create a print of the fabrication drawing Creating an Assembly Drawing Choose Display − Color/Visibility from the top menu First you will turn OFF some of the items from the previous lab In the Board Geometry folder, turn the Dimension subclass Off and turn the Assembly_Notes On In the Package Geometry folder, turn the Assembly_Top subclass On In the Manufacturing folder, turn Nclegend-1-6 Off In the Stack-Up/Conductor folder, turn Top Pin On In the Components folder, turn Ref Des/Assembly_Top On 272 © 2015 Cadence Design Systems, Inc All rights reserved Preparation of the Board Design for Manufacturing Click OK to close the Color Dialog form The assembly drawing information is now visible Choose View − Zoom World to display the entire drawing format If your computer is networked to a printer, you can print what you have currently displayed in the PCB Editor screen by choosing File − Plot © 2015 Cadence Design Systems, Inc All rights reserved 273 Preparation of the Board Design for Manufacturing Lab 15-7 Creating Fabrication and Assembly Drawings Objective: Creating an NC DRILL File Creating an NC DRILL File Choose Manufacture − NC − NC Parameters from the top menu An NC Parameters form appears In the Excellon format section, set the Format to 2.5 Click Close The parameters are written to a file called nc_param.txt Choose Manufacture − NC − NC Drill from the top menu An NC Drill window appears Click Drill to start the file creation process Click Close The drill data is extracted from the design file (final.brd), and the drill file (final16.drl) is written to disk Use the File Manager or a viewer of your choice to view the final16.drl file Choose File − Viewlog to view the nctape.log file that was created The log file displays format information, as well as hole size and quantity data Click Close in the log file window to close the window 10 Choose File − Save from the top menu A window appears and warns you that the final.brd file already exists It asks if you want to overwrite the file 11 Click Yes to confirm the overwrite The final.brd file is written to disk 274 © 2015 Cadence Design Systems, Inc All rights reserved ... without prior written permission from Cadence This statement grants you permission to print one (1) hard copy of this publication subject to the following conditions: The publication may be used