Pro/ENGINEER Tutorial (Release 2000i-2)
Contents
1. Before accepting this new feature we can have a look at it s 3D shape and relation to other features on the part In the element window click on the Preview button Make sure the mouse is in the graphics window then press and hold down the CTRL key while DTM3 dragging with the middle mouse button This will cause the shaded block to spin around following the mouse You can do as much spinning as you want You might note that when viewed from the left back bottom you will see the red side of the datum planes these may not be visible while you are spinning Also note the new position of the spin center if it is turned on You can use the left and right mouse buttons with CTRL to zoom and pan in the graphics window Figure 21 The final SOLID PROTRUSION feature Accepting the Feature Once you are satisfied with the feature you have created click on OK in the element window or middle click In the present case you should see the message Protrusion has been created successfully in the message window The final part shown in default view orientation press CTRL D or select View gt Default should look like Figure 21 Saving the Part It is a good idea to periodically save your model just in case something serious goes wrong From the top toolchest select the Save button In the command window you will be asked for the name of the object to be saved remember that you can have more than one loaded into mem2. and Right views of the block by selecting the following references Default Standard Reference 1 Reference 2 Engineering View Front DTM2 Right DTM1 a Front DTM3 Top DTM2 Set Save Delete Front DTMI Top DTM2 ona Figure 23 View creation and naming menu Modifying the View Environment Try using some of the commands under the Utilities gt Environment menu These commands include hidden line no hidden or turning on off the datum planes or the coordinate system The default settings usually show hidden lines and tangent edges as gray lines Your new settings will take effect when you select Apply or leave the Environment menu Note that the most common display styles are easily obtained using the short cut buttons in the top toolchest Experiment with these buttons leaving the view showing wireframe with hidden lines Note that hidden lines are shown in a slightly darker shade than visible lines With practice you will be able to use this visible clue to help you understand the 3D orientation of the part in space The view control commands sometimes interact in strange ways For example to see a shaded image select View gt Shade Note that this view turns off the datum planes If you dynamically spin this view the shading will disappear The Shading shortcut button however will leave the datum planes visible and you can spin the shaded image Creating a Simple Object using Sketcher 1 31 Usin
3. Figure 3 an index Figure 4 and a search function Figure 5 The last two Check this location with your local system administrator Creating a Simple Object using Sketcher 1 9 a require some time to load the data Contents Index Search Contents Index Search Contents Index Search 9 Welcome Type in the keyword to find Type in the word s to search for D Welcome to PTC Help line helical sweep Ei 2 Using the Pro ENGINEER Helg ME aes DIM TYRE ee ae Pro ENGINEER Basics creating About Advanced Surface Features Using Sketcher EDIT POS About Helical Sweeps E Using Part Modeling MARKUP Creating a Helical Sweep with a Variable Pi m Working with Model Properties MEAS TYPE Example Creating a Helical Sweep E Managing Model Composition line data format Example Creating a Helical Sweep with a Using Configuration File Optiot ine fort r Eae Sweep with a Constant S oan aie aera creating a pattern 1 Io Create a Helical Sweep with a Variable F Sing nde menial MORES deleting To Modify Features with Multiple Sections files accessing f Figure 4 On line Help Index Figure 3 On line Help gure 4 On line Help Index Figure 5 On line Help Search Contents Helpful Hint When you are finished browsing through the help pages you should minimize the browser rather than closing it This will save you time if you want to start it up again later You are strongly urg
4. picks and possibly some values entered at the keyboard usually numerical This window will show us a summary of the specified data and record our progress as we create the feature As you proceed you will be asked several questions and be presented with a considerable number of options We won t go into a lot of detail on all these options now because you probably want to get on to the good stuff as soon as possible Just follow the menu picks described below First you must specify whether you want the extrusion to happen on one or both sides of the sketch plane we ll set that up next For now choose the following and remember that a highlighted menu item is pre selected and the middle mouse button means Done 1 14 Creating a Simple Object using Sketcher One Side Done Now see the message window you need to choose a sketch plane on which to draw the cross sectional shape For the block the sketch plane will be one of the datum planes You can use any planar entity as a sketch plane including the surface of an object The sketch plane is selected by using the left mouse button on either the edge or the nametag of the datum plane or by clicking on any planar part surface In this instance you will use DTM3 as your sketch plane so click on the label DTMS3 A red arrow will appear somewhere on the edge of DTM3 Read the bottom line in the message window For practice choose the command Flip on the DIRECTION menu This e
5. 1 2 that Sketcher will invoke if necessary in order to successfully regenerate your sketch It will only do this if the specified dimensions and or alignments are not sufficient to completely define the geometry You should become familiar with these rules and learn how to use them to your advantage Conversely if you do not want a rule invoked you must either a use explicit dimensions or alignments or b exaggerate the geometry so that if fired the rule will fail or c tell Pro E explicitly to disable the constraints For example if a line in a sketch must be 2 away from vertical draw it at 15 and explicitly dimension it otherwise it will be assumed to be exactly vertical with no dimension required thus no way to make it 2 off After the sketch regenerates you can modify the dimension to the desired 2 When geometry is driven by an explicitly created dimension some internal rules will not fire 1 26 Creating a Simple Object using Sketcher i ar EEE Table 1 2 Implicit Rules in Sketcher S S O Equal radius and diameter If you sketch two or more arcs or circles with approximately the same radius the system may assume that the radii are equal Symmetry Entities may be assumed to be symmetric about a centerline Horizontal and vertical lines Lines that are approximately horizontal or vertical may be considered to be exactly so Parallel and perpendicular lines Lines that are sketched approximately parallel or perpendi
6. and then anywhere on the datum DTM2 In the message window ALIGNED appears indicating a successful alignment and a brown patterned line appears on the sketch at the alignment location If alignment fails you will see an error message Try to align the top horizontal line of the sketch with DTM2 This will fail Why In order for alignment to succeed the line must be close to the object you are aligning to and remember that alignment does NOT mean make parallel In the future if your sketch is very inaccurate you might have to zoom out on your sketch to bring the entity and the alignment reference closer together within a few pixels on the screen Align the left vertical line and the plane DTM1 You can do this very quickly by double clicking on the sketch line since the datum plane is right underneath it Dimensioning the Sketch So far we have told Sketcher where our sketch is located using the alignments Now we have to tell it how big the sketch is using dimensions These location and size are two basic requirements for a successful sketch Click on Dimension in the SKETCHER menu There are many ways to dimension this sketch What follows is the easiest way not necessarily the best Again you might like to review the table of special mouse functions Table 1 1 Click the left mouse button on the lower horizontal edge of the sketch Position the cursor below the sketch and click the middle mouse button A
7. dimension will appear with letters something like sd0 The sd indicates that this is a sketch dimension the 0 is a dimension identifier counter generated by Pro E Each dimension in a sketch part or assembly has a unique identifier this will be important later when we get to relations This is the basis of the parametric nature of Pro E Dimensions are numbered successively eg sd0 sd1 etc So if sd0 has already been used the next dimension will be labeled sd1 With Dimension gt Pick still highlighted left click on the upper and lower horizontal lines Move the cursor to the right of the sketch and click the middle mouse button to place the dimension Now left click on one of the arcs at the top move away from the arc and middle click Dimension the other arc the same way Your dimensioned sketch should look something like Figure 19 Don t worry if your dimension symbols are different what matters is the intent of the dimensioning scheme Creating a Simple Object using Sketcher 1 21 Figure 19 Dimensioned sketch before regeneration Regenerate Click on the command Regenerate on the SKETCHER menu What does regeneration do You will recall that Sketcher has a number of built in rules to interpret your sketch We will discuss these rules at length a bit later in this lesson Regeneration calls on these rules if necessary to clean up your freehand drawing also using the dimensional references and any alignments
8. fillets Quick note If you make a mistake in drawing your shape you can choose Delete from the SKETCHER menu and click on whatever you wish to remove Then replace or add lines by selecting Sketch and Mouse Sketch again We will cover more advanced Sketcher commands a bit later Aligning the Sketch Next the sketch will be aligned with the datum planes Aligning is how you specify locational relations between lines and vertices in your sketch and existing part features By aligning sketched entities you are essentially telling Pro E to keep this entity in the sketch lined up with this previously created line edge or surface Here are some important things to note about alignments t You can only align new sketched features in light blue to previously defined features in white or gray or datums planes axes curves or points t You can t align any part of a sketch to another part of the same sketch t Alignment does not mean make this line parallel to that one which is a very common misinterpretation with new users Explicitly defining alignments is one reason why our sketch doesn t have to be absolutely precise Pro E will make sure that the geometry will be created as you specify using alignments and dimensions Select the following Alignment gt Align gt Pick 1 20 Creating a Simple Object using Sketcher SSS a a See Read the message in the message window Click on the lower horizontal line of the sketch
9. origin on DTM1 1 18 Creating a Simple Object using Sketcher aaa ae ea eS ae ee ee SOS ee 3 left click horizontally to the right 4 left click straight down on DTM2 5 left click back at the origin 6 middle click anywhere on the screen This will complete the polygon and the screen should look similar to this minus the balloons DIM3 6 middle click Figure 17 Drawing the Sketch The sketched entities are shown in light blue actually cyan The visible lines may only be partially seen due to the datum planes Note that we didn t need to specify any drawing coordinates for the rectangle nor for that matter are any coordinate values displayed anywhere on the screen This is a significant departure from standard CAD programs We also didn t need the grid or a snap function although both of these are available in Pro E To help us see the orientation of the part in 3D wireframe we ll add a couple of rounded corners on the top corners of the sketch In the GEOMETRY menu select Arc gt Fillet and pick on the top and right lines in the sketch close to but not at the corner A circular fillet is created to the closest pick point Then pick on the top and left lines Your sketch should look like Figure 18 Don t worry if your proportions are slightly different or the rounded corners are not this size Creating a Simple Object using Sketcher 1 19 SSS SSS aa l TA Figure 18 Sketch with
10. NT replaces DTM3 The part also contains a coordinate system named views look in the Saved Views List and other data that we ll discover as we go through the lessons The named views correspond to the standard engineering views Thus it is important to note that if you are planning on using a drawing template discussed in Lesson 8 your model orientation relative to the default datums is critical The top front right views of the part are the ones that will be automatically placed on the drawing later If your model is upside down or backwards in these named views then so will be your drawing This is embarrassing Now having created this new part you are all set up to do some of the exercises at the end of the lesson Leaving Pro ENGINEER When you want to quit Pro E entirely after you have saved your part s you can leave by using the Exit command in the File menu or the X at the top right corner Depending on how your system has been set up Pro E may prompt you to save your part and any sketches you made In these lessons you do not need to save the sketches If you are sure you have saved the most recent version of the part you don t need to do that again This completes Lesson 1 You are strongly encouraged to experiment with any of the commands that have been presented in this lesson Create new parts for your experiments since we will need the block part in its present form for the next lesson The only way to become prof
11. Pro ENGINEER Tutorial Release 2000 7 A Click by Click Primer and Multimedia CD E PERTE AS HE SHEL_APAT 3 0 Fe HRS EAR CORE RAT mi GUAE PAT i HOLOERPAT iret Haas HE SHEWL_LPAT u m SALA ni Bale PRT Ho COMNECT Pat 3 ALO PALPAT a MOHT Ey TOP By Paii n hania om Panan 3d Ea Holga TA harim d 15 kremi Has H E aCORPAT um PRGA P E 3CAEWPAT n E Ama PRT H SCREWLPAT a Cidia q led Hee Text by Roger Toogood Ph D P Eng Mechanical Engineering University of Alberta Multimedia CD ROM by Jack Zecher P E Mechanical Engineering Technology Indiana University Purdue University Indianapolis PUBLICATIONS Schroff Development Corporation www SDCpro com Creating a Simple Object using Sketcher 1 1 gt Lesson 1 t wontons our Introducing Pro E and Pull Down Menus eh som Creating a Simple Object using a Sketcher Synopsis How to start Pro E representation of Pro E command syntax command flow in Pro E special mouse functions Pro E windows creating a part using Sketcher Sketcher constraints changing the view saving a part part templates Overview of this Lesson We are going to cover a lot of introductory ground in this lesson The main objectives are to introduce you to the general procedure for creating features and let you get into the Pro E environment We will go at quite a slow pace and not really accomplish much in terms of part creation but the centr
12. To illustrate this crucial point consider the images shown in Figure 13 These show two cases where different datums were chosen as the Top sketching reference In both cases the sketching plane was DTM3 On the left the Top reference chosen was DTM2 On the right the Top reference chosen was DTM1 The identical sketch shown in the center was used for both cases However notice the difference in the orientation of the part obtained in the final shaded images Both of these models are displayed in the default orientation check the datum planes Clearly choosing the sketching reference is important particularly for the base feature Well almost always It is possible to sketch in 3D in which case you can manipulate your view so that you are not looking perpendicularly at the sketch plane We will not attempt that here Creating a Simple Object using Sketcher 1 1 a i I i I TOP Reference Figure 13 The importance of the sketching reference plane Note that there is a default setting available for the sketch reference Until you get more experience with Pro E it is suggested that you avoid this The default is chosen based on the current view orientation of the part Therefore the results can be unpredictable and quite likely not what you want Select Top from the SKET VIEW menu The plane or surface we select next will face the Top of the screen in the sketch we are about to make Click on DTM2 this determines the p
13. al ideas will be elaborated and emphasized 1 Starting Pro ENGINEER gt Pro E windows 2 How commands are entered into Pro ENGINEER gt menu picks gt command window gt special mouse functions 3 How this tutorial will represent the command sequence How to get On Line Help 5 Creating a Simple Part gt creating and naming the part gt creating datum planes gt creating a solid protrusion using Sketcher 6 Saving the part 7 Sketcher constraints during Regeneration gt implicit constraints gt unsuccessful regeneration gt the Sadder Mister sequence 8 View controls Orientation and Environment gt naming views 9 Using Part Templates 10 Leaving Pro ENGINEER 5 1 2 Creating a Simple Object using Sketcher a eel It will be a good idea to browse ahead through each section to get a feel for the direction we are going before you do the lesson in detail There is a lot of material here which you probably won t be able to absorb with a single pass through Good luck and have fun Suggestion You may find it helpful to work with a partner on some of these lessons because you can help each other with the tricky bits You might split the duties so that one person is reading the tutorial while the other is doing the Pro E keyboard and mouse stuff and then switching duties periodically It will also be handy to have two people scanning the menus for the desired commands and watching the screen Pro E uses a lo
14. as many of the Sketcher implicit rules as you can How do you save a part What is the difference in operation between View gt Shade and the Shading shortcut button What is a template What is your system s default template Where does your system store your part files when they are saved What is meant by the active part How does Sketcher determine the radius of a fillet created on two lines Try to create sketches procedures that cause the errors noted in the section Unsuccessful Regeneration of a Sketch on page 1 28 eee ee 1 34 Creating a Simple Object using Sketcher OOo 2s a eS ee ee Exercises Here are some simple shapes that you can make with a single solid protrusion They should give you some practice using the Sketcher drawing tools and internal rules Create these with Intent Manager turned off Choose your own dimensions and pay attention to alignments and internal constraints The objects should appear in roughly the same orientation in default view ct S gt S 6 5
15. brackets f as follows block In this case just enter the characters inside the square brackets Thus you might see a command sequence in a lesson that looks like this Feature gt Create gt Solid gt Protrusion gt Extrude Solid Done If a command is launched using a toolbar button that will be stated in the text How to get On Line Help Since Release 18 of Pro E extensive on line help has been available The help pages consisting of the entire Pro E user manual set many thousands of pages are viewed using a browser the default is Netscape There are three ways to access the help files 1 Right clicking on a command in the menus will show a button that you can press to bring up the relevant pages in the manual context sensitive help 2 Selecting the Pro E Help System command from the Help pull down menu 3 Click the What s This button on the right end of the top toolbar Then click on any command or dialog window 3 Launch your browser and point the URL to the location file el ptc proe2000i2 html usascii proe master htm where e ptc proe200012 is the drive and directory where you have the program installed Some installations may have the help files installed on a separate file server Once the Help pages are launched this may take a few seconds you can page forward or back or bring up additional navigation tools by selecting the Contents button These tools include a contents listing
16. cal system administrator as different installations may handle the Pro E launch differently Under Windows there may be an icon on your desktop or you can look in the Start menu on the Windows Taskbar Creating a Simple Object using Sketcher 1 3 W Pro ENGINEER Pull Down Top Toolchest J E Menus shortcut buttons QUIT Prompt Message Window MAIN GRAPHICS AREA Right Toolchest shortcut buttons a Command Description Figure 1 The Pro ENGINEER 2000i screen default settings We will digress a bit to discuss how this tutorial will deal with command entry How commands are entered into Pro ENGINEER There are a number of ways that you will be interacting with the program menu picks buttons keyboard entry and special mouse functions These are described below Pull Down Menus The main pull down menus are presented across the top of the Pro E window Click on the File menu to open it and scan down the list of available commands Many of these have direct analogs and similar functions to familiar Windows commands Move your cursor across to each pull down menu in turn and have a quick look at the available commands We will introduce these on as as needed basis as we go through the lessons Some menu commands will open up a second level menu these have a symbol Commands unavailable in the current context are always grayed out The available menu choices will also change depending on the current op
17. cular may be considered to be exactly so Tangency Entities sketched approximately tangent to each other may be assumed to be tangent Equal segment lengths Lines of approximately the same length may be assumed to have the same length Point entities lying on other entities or Point entities that lie near lines arcs or collinear with other entities circles may be considered to be exactly on them Points that are near the extension of a line may be assumed to lie on it Equal coordinates Endpoints and centers of the arcs may be assumed to have the same X or the same Y coordinates Midpoint of line If the midpoint of a line is close to a sketch reference it will be placed on the reference When a sketch is regenerated the rules that have been fired are indicated on the graphics window using one or more symbols beside each affected entity The symbols are shown in Table 1 3 on the next page Creating a Simple Object using Sketcher 1 27 Table 1 3 Graphical Display of Sketcher Constraints Horizontal entities H Vertical entities y Line segments with equal lengths L with an index in subscript for example L Perpendicular lines Perpendicularity symbol with or without an index number in subscript Parallel lines Parallel symbol with an index in subscript Small thick dashes between the points R with an index in subscript Point entity An example of a solved sketch with the geometric constraints is shown in Figu
18. e a more descriptive name So double click left mouse on this text to highlight it and then type in block without the square brackets as your part name and press Enter or select OK The New File Options dialog window opens as E New File Options shown to the right Since we elected in the SSS SSS previous window to not use the default template for this part NOTE templates are discussed towards the end of this lesson Pro E is presenting Empty inlbs_part_sheetmetal inlbs_part_solid a list of alternative templates defined for your mmns_part_sheetmetal mmns_part_solid system As mentioned previously we are going to avoid using defaults this time through So for now select Empty OK At this time BLOCK should appear in the title area of the graphics window Also the PART menu should appear to the right of the main window Figure 8 Setting options for new parts Create Datum Planes and Coordinate System We will now create the first features of the part E three reference planes to locate it in space These Datum Plane Lt are called datum planes It is not strictly Datum Axis necessary to have datum planes but it is a very good practice particularly if you are going to Datum Curve make a complex part or assembly The three Datum Point default datum planes are created using the Datum Plane button on the right toolbar as Coord S ystem shown in Figure 9 Do that now Analysis Fea
19. e sketch regenerates successfully then you are finished with Sketcher for this feature To complete the process select Done from the bottom of the SKETCHER menu it may be partially hidden behind one of the smaller menu windows Be careful that you don t click on Quit by mistake although you can cancel that if you do Important Note For the time being you should never leave Sketcher with unresolved errors or warnings that prevent a clean regeneration Many errors are fatal but some result only in warnings Always resolve these problems and get a successful regeneration before leaving indicated by the message Section regenerated successfully You will come to love seeing this message We will see a few cases later when a warning is generated that we will ignore but this situation is very rare O Specifying Extrusion Depth This is the final element to specify for the base feature check out the element window Recall that we set up this feature as a one sided protrusion off DTM3 the sketch plane To make the block we will extrude the polygon for a specified distance this is called a blind protrusion From the SPEC TO menu choose Blind Done You will be prompted in the message window for an extrusion depth Enter 10 and press return 1 24 Creating a Simple Object using Sketcher A message should indicate that All elements have been defined meaning that the extrusion was created successfully Previewing the Feature
20. ed to explore the on line help If you have a few minutes to spare now and then browse through the manuals especially the Pro ENGINEER Foundation sections In the beginning it will be a rare event when you do this and don t pick up something useful If you desire and have the local facilities you can obtain hard copy of these manual pages using your browser Your system may have postscript versions of these pages check with your system administrator Be aware of the cost and time involved in printing off large quantities of documentation Creating a Simple Part using Sketcher In the first two lessons we will create a simple block with a circular hole and a central slot By the end of the second lesson your part should look like Figure 6 below This doesn t seem like such a difficult part but we are going to cover a few very important and fundamental concepts Try not to go through this too fast since the material is crucial to your understanding of how Pro E works Not only are we going to go slowly here but we are going to turn off some of the default actions of Pro E This will require us to do several things manually instead of letting the program do them automatically This is so that you will have a better understanding of what the many default actions are and do Furthermore eventually you will come across situations where you don t want the default and you ll need to know what to do The first thing to do here is to turn o
21. erating mode 1 4 Creating a Simple Object using Sketcher o OOU O as ae a a a ee Short cut Buttons Immediately below the pull down menus is a row of short cut buttons The buttons in the default screen setup are shown in Figure 2 There are basically four groups of buttons as indicated on the figure Other buttons may appear on this row as you enter different parts of the program Buttons not relevant to the current program status are either not shown or are grayed out Move your cursor across the buttons and a pop up window will tell you the name of the button and the command associated with the button is described in a line of text below the graphics window Note that there is another set of buttons on the right side of the graphics window These are discussed a bit later You can add your own buttons to customize either of these areas Zoom In Zoom Out Datum Planes on off Refit to Screen Datum Axes on off Orient Model Datum points on off aes View List Systems on off Context of ga 2 Sensitive Help Print Model Tree on off Save As Shading Save No Hidden Open Object Hidden Line Create New Object Wireframe Figure 2 Top toolchest default with groups toolbars of related buttons Menu Picks Many other commands and command options are initiated using picks on menus that will appear at the time they are needed These function menus will show up to the right of the main window with commands arranged vert
22. f a command menu by pressing an available Done return or Quit command or by pressing a command on a higher menu At some times you will be given a chance to Cancel a command This often requires an explicit confirmation so you don t have to worry about an accidental mouse click canceling some of your work Very Important Hint Regarding window management DO NOT maximize the main Pro E screen and DO NOT resize or move the main or menu windows Pro E is pretty good about placing these so that they don t collide or overlap If you start messing with the window size and placement sooner or later you will bury a command menu behind other windows particularly if your computer has a small screen This will cause you a lot of confusion Let Pro E do its own window management for now Pop Up Menus One of the big changes in Pro E 2000i is the number of pop up menus used These are available in a number of operating modes by clicking and holding down the right mouse button This brings up a pop up menu at the cursor location which contains currently relevant commands that is they are context sensitive These commands are often listed in the menus to the right but having them pop up at the cursor location means you don t have to keep taking your attention off the graphics window Command Window Occasionally you will enter commands from the keyboard Generally we will only use the keyboard to enter alphanumeric data when requested suc
23. ff a special window called the Model Tree We will be 1 10 Creating a Simple Object using Sketcher discussing this later on Close it by selecting View gt Model Tree to turn off the check mark or press the short cut button E in the top toolbar so that it is not pressed in Next we are going to turn off Intent Manager which is a tool used in Sketcher From the pull down menus select Utilities gt Environment Near the bottom of this menu turn off the check beside Sketcher Intent Manager Then OK not Close fi g i Tt b ar ie Q e e m e m e e Figure 6 Final block at the end of lesson 2 Figure 7 Creating a new part Creating and Naming the Part Click the Create new object short cut button see Figure 2 or select File gt New A window will open Figure 7 showing a list of different types and sub types of objects to create parts assemblies drawings and so on In this lesson we are going to make a single solid object called a part Select Part Solid Deselect the Use Default Template option at the bottom Many parts assemblies drawings etc can be loaded simultaneously given sufficient computer memory in the current session All Creating a Simple Object using Sketcher 1 11 objects are identified by unique names A default name for the new part is presented at the bottom of the window something like PRT0001 It is almost always better to hav
24. g Part Templates This is one of the exciting enhancements in Pro E 2000 In the block part created previously the first thing we did was to create default datum planes In the last section we created named views These are very common features and aspects of part files and it would be handy if this was done automatically This is exactly the purpose of part templates A template is a previously created empty part file that contains the common features and aspects of almost all part files you will ever make These include among other things default datum planes and named views Pro E actually has several templates available for parts drawings and assemblies There are variations of the templates for each type of object One important variation consists of the unit system used for the part inches or millimeters Templates also contain some common model parameters and layer definitions A template is selected when a new model is first created Let s see how that works Create a new part note that you don t have to remove the block Pro E can have several parts in session at the same time by selecting File gt New or using the Create New Object button The New dialog window opens Select the options Part Solid and enter a new name like exercise_1 Remove the check mark beside Use default template and then select OK In the New File Options dialog window the default template is shown at the top It is like
25. h as object or file names numerical 1 6 Creating a Simple Object using Sketcher ee o values and so on Note that when Pro E is expecting input in the command window none of the menu picks will be live Helpful Hint If your mouse ever seems dead that is the menus won t respond to mouse clicks check the message window Pro E is probably waiting for you to type in a response You will have to get used to watching three areas on the screen the menu s the graphics window and the command message window At the start this will get a little hectic at times Until you become very familiar with the menu picks and command sequence keep an eye on the one line message description in the message window There is often enough information there to help you complete a command sequence Special Mouse Functions Locations within the graphics window and menu commands are generally identified and or selected using a left mouse click However all three mouse buttons have been set up to provide shortcuts for operations within the graphics window The basic ones are shown in Table 1 1 The more comfortable you get with these mouse functions the quicker you will be able to work They will become second nature after a while Other mouse functions will be introduced a bit later in the lessons These have to do with the use of a powerful mode of operation of a program called Sketcher using a new program feature introduced in Pro E 20 called the I
26. ically As you move the mouse pointer up and down within the command menus a one line message describing the command under the pointer will Customization of the interface is discussed in Lesson 1 in the Pro ENGINEER Advanced Tutorial available from Schroff Development Corp Creating a Simple Object using Sketcher 1 5 ss appear at the bottom of the graphics window Suggestion As you start to learn Pro E each time you come to a new menu get in the habit of quickly scanning up and down the listed commands and noting the brief message in the command window In this way you will build a familiarity with the location of all the commands You execute a command by picking it using the left mouse button Menu choices that are grayed out are either not available on your system or are not valid commands at that particular time Often when you pick a command other menus will pop open below the current one When these represent options for the current command the default option will be highlighted You can select another option by clicking on it There may be several groups of options on a single menu separated by horizontal lines Any options not currently valid are grayed out When all the options in a menu are set the way you want click on Done at the bottom of the option menu window Helpful Hint Clicking the middle mouse button is often synonymous with selecting Done or pressing the Enter key on the keyboard You can often back out o
27. icient with Pro E is to use it a lot In the next lesson we will add some more features to the block discover the magic of relations and spend some time learning about the Intent Manager in Sketcher Creating a Simple Object using Sketcher 1 33 Questions for Review Here are some questions you should be able to answer at this time 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Zi 28 29 30 31 What is meant by a blind protrusion What is the purpose of the sketching reference plane What aspect of feature creation results in the parametric nature of the model What mouse action can be used to spin the object What is meant by alignment What three outcomes are possible when you regenerate a sketch What do these mean What is the correct order of the following activities for using Sketcher sketch drawing modify dimensions regenerate alignments place dimensions regenerate Why do datum planes have a red and yellow side What is the purpose of the datum planes When you look at a sketch in which direction will a one sided solid protrusion occur How do you specify the name of a part What are three ways to get on line help When you are in Mouse Sketch mode what do the three mouse buttons do How can you get a shaded image of the part What mouse action can be used to zoom in on the part How do you turn the datum plane visibility on and off Give
28. lane that you want to orient in the direction chosen IMPORTANT Another window titled Sketcher Enhancement Intent Manager may also open up We will be discussing this powerful tool a bit later in Lesson 2 For now Close this window 1 16 Creating a Simple Object using Sketcher CoC O O O OOOO a O O E The graphics window should now appear as shown in Figure 14 The background DTN color may have changed depending on your system settings Note that the datum plane DTM3 that you identified as the sketching plane is facing towards you you should see a yellow square The other datum planes DTM1 and DTM2 appear in edge view with a yellow side and a red side The yellow and red sides of datum planes will be more clear when you view them in 3D in a couple of minutes The yellow side positive of DTM2 faces the top of the sketch exactly as you l DTM specified above Note that we could have en Onenlablon by seleeane Figure 14 The drawing window in Sketcher Observe the location and orientation of the coordinate system CSO and the spin center The Sketcher menus at the right of the screen are what you will use to create the 2D sketch for the part Note also that some new short cut buttons have appeared at the top of the screen One of these is to turn the dashed grid off try that now then use the Repaint button to clean up the screen Defining the Sketch using Sketcher The Sketcher menu is no
29. ly inlbs_part_solid This template is for solid parts with the units set to inch pound second It seems strange to have force and time units in a CAD geometry program Actually this is included so that the part units are known by downstream applications like ProMMECHANICA which perform finite element analysis FEA or mechanism dynamics calculations These programs are very picky about units Note that there are templates available for sheet metal parts and for metric units millimeter Newton second While we are mentioning units be aware that if you make a wrong choice of units here it is still possible to change the units of a part after it has been created There are only two model parameters in the default template DESCRIPTION is for an extended title for the part like UPPER PUMP HOUSING This title can eventually be called up and placed automatically on a drawing of the part using you guessed it a drawing template Similarly the MODELED_BY parameter is available for you to record your name or initials as the originator of the part Fill in these parameter fields and select OK Model parameters and layers are discussed in the Advanced Tutorial 1 32 Creating a Simple Object using Sketcher SSS a a eS eS ee The new part is created which automatically displays the default datums They are even named for you we will see how to name features in lesson 2 instead of DTM1 we have RIGHT TOP replaces DTM2 and FRO
30. ly thing Sketcher requires is that you give it just enough information not too little or too much to be able to construct the shape unambiguously using its internal rule set and the dimensions that you provide Familiarity with Sketcher is very important We won t go into a lot of detail with it at this time but will gain experience steadily as we progress through the lessons You would be well advised to come back later and play around with more of the Sketcher functions as often as you can perhaps doing some of the exercises at the end of the lesson In any part creation you probably spend more time in Sketcher than anywhere else in Pro E Before we proceed make sure that the Sketch and Mouse Sketch commands are highlighted You might also like to review the mouse commands in Table 1 1 Drawing the Sketch With the left mouse button click once at each of the four corners of a rectangle as described below and illustrated in Figure 17 After each click you will see a straight line rubber band from the previous position to the cursor position You do not have to be super accurate with these click positions You can also sketch beyond the displayed edges of the datum planes these actually extend off to infinity The displayed extent of datum planes will eventually adjust to the currently displayed object s Here are the points to sketch the rectangle 1 left click at the origin intersection of DTM1 and DTM2 2 left click above the
31. nables you to determine the direction of the extrusion off the sketching plane For this step ensure the arrow is pointing down forward from DTMS in the positive Z direction using Flip if necessary Then choose Okay to commit the direction Next a sketching reference plane must be chosen This can cause a lot of confusion for new users so pay attention This reference plane is used to orient how we will look at the sketching plane just selected DTMS3 Our view is always perpendicular to the sketch plane and one sided protrusions are always created towards you coming out of the screen from the sketch This means in the present case that we are going to be looking directly at the yellow side of the datum plane in the Z direction Since we can rotate our view of the sketch arbitrarily around the Z axis we must tell Pro E how we want to set the orientation of our view of the sketch We orient our view by choosing a reference plane This can be any datum plane or planar part surface that is perpendicular to the sketch plane We specify the direction that plane or surface will face in our view of the sketch top right bottom or left side of the screen Unfortunately Pro E requires us to specify these in the opposite order that is first we select the direction we want the reference to face then we select the reference plane itself Read this paragraph again since new users are quite liable to end up drawing their sketches upside down
32. ntent Manager When we get to creating drawings Lesson 8 we will find some more mouse commands specifically for that mode Creating a Simple Object using Sketcher 1 7 Table 1 1 Pro ENGINEER Mouse Commands PART MODE ert moe cn Regular Pick Done Query Select Done Select or Enter pop up menu Dynamic View Control drag drag drag press and hold CTRL mouse Zoom In Out 3D Spin Pan button Zoom Window Click opposite press CTRL plus corners of zoom box a Sketcher Dimension Diameter Double pick Place Dimension arc circle How this tutorial will represent the command sequence In the early lessons we will try to discuss each new command as it is entered usually by selecting from a menu Eventually you will be told to enter a long sequence of commands that may span several menus and or require keyboard input We will use the following notation in these long sequences Ifyou select a command that starts up another menu window followed by a selection from the new menu you will see the notation using the gt sign as follows menul gt menu2 Ifa number of picks are to be made from the same menu you will see the notation using the 1 8 Creating a Simple Object using Sketcher Je sign as follows these are generally selected in a top to bottom order in the menu option option2 option3 Ifyou are to enter data through the keyboard you will see the notation using square
33. ollowing the sequence below Creating a Simple Object using Sketcher 1 29 E SSS SSS SS ee l Sketch Align Dimension Regenerate Modify Regenerate You can remember this sequence using the acronym Sadder Mister taken from the first letter of each step S A D R M R Remember that Sketcher will automatically provide values for all new dimensions based on the existing features when it regenerates a sketch Let it do that There is no need to modify dimension values prior to the first regeneration and doing so can often cause you grief This means do not Modify a dimension shown in its symbolic sdxx form Now all that being said we will see in the next lesson how the Intent Manager is able to assist you in obtaining a legal sketch usually with considerably fewer commands and mouse clicks and without having to deal with regeneration failures It is important however to understand the basic principles of Sketcher and the implicit rules in order to use Intent Manager efficiently Also sometimes you may not want to use Intent Manager The exercises at the end of this lesson are to give you practice using Sketcher and to explore commands in the Sketcher menus View Controls Orientation and Environment In addition to the dynamic viewing capabilities available with the mouse you can go to predefined orientations To view the object in the default orientation called trimetric select the Saved view list
34. ory at a time Accept the default block prt this is the active part by pressing the enter key or the middle mouse button Pro E will automatically put a prt extension on the file In addition if you save the part a number of times Pro E will automatically number each saved version like block prt 1 block prt 2 block prt 3 and so on Since these files can get pretty big you will eventually run out of disk space So be aware of how much space you have available It may be necessary to delete some of the previously saved versions or you can copy them to a diskette You can do both of these tasks Creating a Simple Object using Sketcher 1 25 from within Pro E we ll talk about that later IMPORTANT NOTE The Save command is also available when you are in Sketcher Executing this command at that time will not save the part but it will save the current sketch with the file extension sec This may be useful if the sketch is complicated and may be used again on a different part Rather than recreate the sketch it can be read in from the saved file In these lessons none of the sketches are complicated enough to warrant saving them to disk Working With Sketcher Constraints during Regeneration Implicit Constraints As alluded to above Sketcher is a powerful geometry engine that is capable of assuming things about your input sketch that indicate your design intent These assumptions are embodied in a number of rules see Table
35. re 22 Note how few dimensions are required to define this sketch 1 28 Creating a Simple Object using Sketcher La L3 O 3 000 Figure 22 A regenerated sketch showing implicit constraints Unsuccessful Regeneration of a Sketch If a sketch cannot be solved using the dimensioning scheme and implicit rules Pro ENGINEER issues a message and highlights the error The basic categories of errors are as follows The sketch does not communicate the intent For example a line that you want tangent to an arc is not close enough for Sketcher to figure out what to do The sketch is underdimensioned The sketch is overdimensioned The segment is too small If you have modified dimensions such that a line segment becomes very small then Sketcher will flag this as an error If you really do want the short segment zoom in on the sketch and regenerate again The segment is of zero length This is similar to the previous error which arises if you have modified dimensions so that in the recomputed position a line segment must have zero length This is an error that must be fixed in the sketch There are inappropriate sections For example a sketch that crosses over itself or an open sketch for a feature that requires a closed one eg for a revolved protrusion The Sadder Mister Order of Operations A common error that can lead to problems getting a successful regeneration is NOT f
36. rn red In the message window a prompt appears asking for the new value The current value is shown which will be the value used if you just hit the Enter key ie value is unchanged Usually you want to enter a new value here For the horizontal dimension use 20 After modifying the dimension value appears in white but our sketch hasn t changed size or shape Change the vertical dimension to 30 The radius of the arc on the right side is 10 and on the left side is 5 Regenerate the Sketch This is the step most often missed After modifying any dimensions or alignments the sketch must be updated It is necessary to regenerate the sketch You can tell when regeneration is needed because some of the dimensions will be showing in white Select Regenerate from the SKETCHER menu again You will now see an animation of Sketcher going about its business This animation will become useful when you create complex sketches since you will be able to see the reasons why Sketcher might fail or your dimensioning scheme or values are not quite right In that case the animation will proceed up to the point where the sketch fails usually caused by incompatible requirements on the sketch At this time your screen should look like Figure 20 Creating a Simple Object using Sketcher 1 23 ee eee SII 5 000 y j ten xy 10 040 30 000 cso C3 DIM L 20 000 Figure 20 The final regenerated sketch Assuming that th
37. s is not included in the part model but is strictly a display device to help visualize the 3D orientation of the model Note the sequence red green blue RGB and the default axis directions XYZ DTM2 DTM r TMI Figure 11 Datum planes represented as Figure 10 Default Datum Planes solids Hint You can change the visibility of the datum planes in two ways click the Datum planes short cut button in the top toolbar not the one on the right side it does something different or select Utilities gt Environment and change the check box beside Datum Planes Note that the Environment command lets you change the visibility and display of a number of items Scan this list quickly before closing the window by clicking OK Many of these environment settings the most common ones are duplicated by the short cut buttons Turning the datums off does not mean they are deleted just not displayed You may turn them back on at any time by re issuing either of these commands Creating a Simple Object using Sketcher 1 13 oe Creating a Solid Protrusion using Sketcher Now its time to start building our part The base feature is the primary shape of a part and is usually the first solid feature made in the model For the block we re working on it is an extruded polygon Later we will add the hole and slot as child features In Pro E new geometric features are usually created by specifying some sketching plane crea
38. shortcut button and click on Default the only view currently defined Alternatively you can select View gt Default or press CTRL D hold the Control key while you press D Your screen should now look like Figure 21 above You can experiment with the View gt Orientation menu see Figure 23 to change the display or use the Orient model shortcut button Figure 2 Read any prompts messages in the message window The general procedure for the Orient by Reference type is to select a pair of orthogonal surfaces that will face the front right top or left in the desired view These are called the view references For example Front DTM3 and Top DTM2 will give the same view as our sketch You can also obtain a new view by an explicit rotation around an axis in the part or relative to the screen 1 30 Creating a Simple Object using Sketcher a Orientation x Naming Views Orient by reference Views that you are going to use over and over are usually named so that it is easy to return to them later When a desired view is Reference 1 obtained like one of the standard engineering top front right Front p orientations the view can be saved by entering a view name and X DTMs Fs selecting Save See Figure 23 Once a view has been named Reference 2 you can easily return to it using the Saved view list button Try Top this by creating and naming the standard engineering Top Front 4 DTM2 F2
39. t of visual queues to alert you to what the program is doing or requires next Starting Pro ENGINEER To start Pro ENGINEER type proe2000i2 at your system prompt and press the Enter key The program takes a while to load so be patient The startup is complete when your screen looks like Figure 1 The screen shown in the figure is the bare bones default Pro E screen If your system has been customized your interface may look slightly different from this The main graphics area is of course where most of the action will take place Windows users will be quite at home with the pull down menus and the use of the short cut buttons at the top and right side of the screen called the toolbars or toolchest As you move the mouse across the short cut buttons several will be grayed out and inactive at this time a brief description will appear on the bottom of the Pro E window and a tool tip window will pop up The prompt message window below the top toolchest shows brief system messages including errors and warnings during command execution Pro E is usually set up to show only the last 2 lines of text in this message area but you can resize this area by dragging on the lower horizontal border You can also use the scroll bars at the right to review the message history The prompt message area is also where text is typed at command prompts that ask for information such as dimensions and part names You may have to check this sequence with your lo
40. that you supplied During regeneration Sketcher determines correctness of your sketch The three possible outcomes are 1 geometry underspecified This is usually caused by missing alignments or incomplete dimensioning The locations and lines that Sketcher cannot locate are shown in red this is called the measles and everyone gets them sooner or later A message appears in the message window telling you to locate the indicated vertices The Dimension command is automatically selected although it may be that you have just forgotten to align some part of the sketch to the existing features 2 geometry overspecified There are more dimensional references than are required to specify the geometry Redundant dimensions are shown in red and the Delete command is automatically selected Click on any dimension ie not just the red ones to delete it Be warned that clicking on any dimension may not necessarily solve your problem since the problem may be elsewhere in the sketch Note also that if a sketch is created by aligning all the geometric entities to previously created features it may not be necessary to supply any dimensions for the new sketch You may sometimes find that Sketcher needs fewer dimensions than you think it should This is because it can figure out missing dimensions using its internal rule set This can be good or bad depending if you want any of those internal rules to be 1 22 Creating a Simple Object using Sketcher in
41. ting a 2D shape or sketch in that plane and then extending the shape into 3D either by extrusion sweeping or revolving Let s see how that works for the simple block We will perform the following steps that are common to most solid features Identify the Feature Type Identify Specify Feature Elements Attributes Make a 2D sketch of the basic geometry Generate the feature by manipulating the sketch into 3D by extrusion revolving sweeping blending and so on 5 Preview the feature 6 Accept the new feature cal ale ad At any time during this process you can cancel the operation For the block the base feature type is a solid protrusion Feature elements include the sketching plane the sketched shape extrusion direction and depth The shape is set up in a program called Sketcher To start the block follow this sequence of commands starting from the PART menu Feature gt Create gt Solid gt Attributes Defining Protrusion gt Extrude Solid Done arenan bel eeltel TOIMUSION Direction Required Depth Required A window will open as shown in Figure 12 This shows the elements that must be defined to specify this feature Define Refs Info The current feature type extruded protrusion is shown OK Cancel Preview at the top of the window The window shows that we are defining the feature attributes As we go through the Figure 12 The Feature Elements process of defining elements we will use a mix of menu window
42. ture Figure 9 Right toolbar buttons for creation of datums The datum planes represent three orthogonal planes to be used as references for features to be created later You can think of these planes as XY YZ XZ planes although you generally aren t concerned with the X Y Z form or notation Pro E can keep track of objects of different types with the same names For example a part and a drawing can have the same name since they are different object types 1 12 Creating a Simple Object using Sketcher Your screen should have the datum planes visible as shown in Figure 10 If not see the Hint below They will resemble something like a star due to the default 3D viewing direction Note that each plane has a name DTM1 DTM2 and DTM3 This view is somewhat hard to visualize so Figure 11 shows how the datum planes would look if they were solid plates Although not strictly necessary for this part we will establish a datum coordinate system The command is started using the Coord System shortcut button shown in Figure 9 This opens a menu with a number of options for creating the position and orientation of the system For now select Default Done There should now be an x y z icon labeled CSO in the middle of the datum planes Your screen should now look like Figure 10 Again depending on your system settings you may also have a red green blue triad located at the center of the screen This is called the Spin Center Thi
43. voked If any dimensions that you specify are not needed the geometry is overspecified If any dimensions that you give cause a conflict with the internal rule set the regeneration will fail 3 regeneration successful Everything went just fine and the message Section regenerated successfully appears in the message window Give yourself a pat on the back You can see that Sketcher is a very powerful geometry engine And you can see why you only need to provide a rough sketch of the geometry most of the work is done by Sketcher Sketcher will show you the result of any internal rules that it has used to regenerate your sketch These appear as symbols beside the lines and vertices in your sketch You can look for symbols indicating horizontal vertical parallel tangent same length and so on For our simple block only two or three rules probably were fired All the Sketcher rules are discussed a bit later in this lesson You might investigate the Constraints gt Explain command at this time Modifying Dimensional Values After regeneration numerical dimension values should appear in place of the sd dimension labels These values are generated according to the scale of the existing features or seemingly at random if this is the first solid feature in the model You need to change these numbers to the desired values To do this select the Modify command on the SKETCHER menu Then click on the horizontal dimension it should tu
44. w open on the right side of the screen This is actually the old version of the Sketcher menu used prior to the incorporation of Intent Manager which occurred in Release 20 As mentioned above we have turned off Intent Manager for now so that you can understand some of the underlying principles involved in creating a sketch You need to know this clearly in order to use Intent Manager effectively Furthermore there will be rare occasions when you want to turn Intent Manager off and do everything yourself Some practice with the old Sketcher interface will be useful Sketcher is a powerful tool for entering 2D shapes It is where most of the part geometry creation happens and goes considerably beyond ordinary 2D computer drawing It is truly a sketching tool since you don t have to be particularly accurate with the geometric shape you give it as shown in the two figures below Creating a Simple Object using Sketcher 1 17 ss S Figure 15 Geometry input by user Note misaligned vertices non parallel edges non Figure 16 Geometry after processing by tangent curves Sketcher Note aligned vertices parallel edges tangent curves Sketcher is fun but sometimes also frustrating to use because it is so smart Sketcher has a number of built in rules for interpreting your sketch For example lines that look like they are at 90 degrees to each other are assumed to be exactly that lines that look horizontal are assumed to be and so on The on
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