bigbang |
06-04-2014 11:36 AM |
نكات و ترفندهايي در CATIA V5
[TANGENT CUTTING PROFILE - If you have a message that reads "Tangent cutting profile" when generating a section view, here is a hint: Generally when you subtract or add a volume-based solid to another solid block (standard solid elements), the common areas are adjacent and CATIA does the operation without giving error messages in 3D. However, downstream routines crash (in section cut§ion view command). Unfortunately, it is hard to solve the problem at this stage because this type of error was created by the designer at the beginning of the design stage (surface-volume+solid operations), and all solids are generated to this inefficient structure. Therefore, when the add or subtract or interference commands run obviously long, realize that section-cut and section-view routines will crash.
-- Submitted by Mak. Müh. Levent ÇETINDISLI, Tool Design Chief
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CATIA V5 GSD - The following scenario describes how to get an isoparameter curve in CATIA V5, just as you did in CATIA V4 CURVE1/ISOPARM. To get an isoparameter curve, the surface must be a multi-cell element, which means the surface has some internal edges. You have access to these internal curves. Use the function NEAR (GSD-workbench) and select an internal edge (curve) at the desired position. Choose the edge of the curve or any other near element to be the reference element, such as a point or a plane. Isoparameter curves are useful for creating spline curves, which can connect to a surface on which you have previously extracted an isoparameter curve. In such as case, you can give the spline the tangent conditions to the isoparameter to the surface on which you want to connect the spline curve.
-- Submitted by Heiko Oldendorf, free d graphics, Germany
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SAVING A PART WITH MULTIPLE SURFACES - Sometimes you may run into problems when trying to save a part consisting of multiple complex surfaces. (Often you have duplicate surfaces on top of one another.) Here is one solution. If there are not too many surfaces, you can change the color on each surface. The easiest way to do this is to just scroll over the surfaces in the tree. Surfaces highlight when you have duplicate surfaces. When this occurs, delete one. This way the part will not produce a saving error. We had this problem when working on the V5R6 Ford project.
-- Submitted by Jason Payne, Windsor, Ont
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SWITCHING BETWEEN BACKGROUD AND WORKING VIEWS - Here is a timesaving tip when having to switch between Background and Working Views when accessing the Drafting package. When you are in the working view environment, go to Tools/Customize/Commands/All commands and select Background. Add an icon to this
command, which reflects the Background subject. Select the command Background and drag this down to one of your toolbars, Analysis for example. Close the Customize window. Select your new Background icon, which will put you in this environment. Go to Tools/Customize/Commands/All commands and select Working Views. Add an icon to this command, which reflects the Working View subject. Select the command Working View and drag this down to one of your toolbars (wherever you placed the previous icon). Close the Customize window. Now when working on your 2D drawing it is easy to switch between the two environments without having to use the drop-down boxes.
-- Submitted by Eddie Adams, product designer, Weidmuller Interface Ltd , Sheerness, Kent, England
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SPACEBALL SHORTCUTS - This tip is for users who have access to a spaceball with buttons. I use a Logitech Spaceball 4000 FLX, which is excellent for both 2D and 3D work. (A spaceball is a valuable accessory, and I highly recommend one for all CATIA users.) I have assigned commands to the buttons as follows:
TAB - This allows me to tab across the TOOLS toolbar.
DELETE - It is very easy to select an object and use this button; much like V4. ESC - Allows you to clear any selections you have made without clicking away from the model, which may not be possible.
UNDO - As the name implies (this is much like the NO button on V4). You have to assign a function key F12, for example.
CTRL - For multiple selections. This has allowed me to input commands without having to take my hand away from the spaceball (only for numbers and text), which has greatly increased the throughput of my work.
-- Submitted by Eddie Adams, product designer, Weidmuller Interface Ltd , Sheerness, Kent, England
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CATIA V5 KEYBOARD SHORTCUTS - To change standard views of CatPart or CatProduct, click on the standard view icon, then press ARROW UP, DOWN, RIGHT or LEFT
as you wish.
ROTATIONS TIPS - To rotate your model on screen, click anywhere on your screen except the toolbar area and press: SHIFT+ARROW UP or DOWN keys for vertical rotation. SHIFT+ARROW RIGHT or LEFT for horizontal rotation. Hold keys for a full rotation.
-- Submitted by Daniel Bertrand, mechanical designer, Oerlikon Contraves Inc., Quebec, Canada
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V5 TIMESAVER - Many times when starting a sketch, you will find it is too small or too big, and as you add constraints and modify them, your sketch becomes misshaped. Therefore, you need to scale all lines, arcs and circles with the constraints already on the sketch. To do this, use the scale without the duplication turned on. The nice part of doing this is that all the constraints will scale up or down at the same time and in the same ratio. This timesaving trick prevents you from fiddling with the sketch to get it close to the size you need. This is especially helpful on sketches with a lot of arcs and circles with tangencies. It also prevents complex sketches from turning red (with an error), because geometry relations need to increase at the same ratio simultaneously to retain shape integrity.
-- Submitted by Kevin Soukup, senior mechanical designer and CAD adminstrator, Krebs Engineers, Tucson, AZ
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Change V5 Default Settings When CATIA V5 is installed in the desktop or mobile workstation, it comes with some default settings. Here's how to change some of the default settings. To switch off the Flash Display during CATIA V5 start up, add the following environment variable: CNEXTSPLASHSCREEN = NO. To dump the CATIA V5 Output to console, add the following environment variable: CNEXTOUTPUT = Console. To avoid the default start up of CATIA Product Window during V5 start up, add the following environment variable: ADL_ODT_IN = 1.
Lastly, to add an Environment variable, you should right-click on MyComputer, select Properties, select Environment Variables and click new button.
--Submitted by Sridlhar Pasupuleti, QA engineer, Geometric Software Solutions, Bombay, India Extract Model from Sequential
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This tip provides an easy method to utilize the Extract Model From Sequential utility in V5. Under, MyComputer, go to Tools and click Folder Options. Click on File Types. Click on New. You will be asked to fill a file extension. Type in EXP. The EXP extension will show up in the registered File Types list, so select it. Click on Advanced. Another window will open. Click on New. Another window will open asking for an action. Name it Extract Model From Sequential or whatever suits you. You will be asked for an application used to perform action. Answer with "C:\Program Files\Dassault Systemes\B09\intel_a\code\bin\CATExtractModelFromSequential. exe" -il "%1" -od "." -report "Trans_info". Click OK.
You now have created a new file extension recognized by Windows. Please note: I tried to make it so that the info file was named the basename of the filename + .info extension e.g., "-report "%~n1.info", but could not get it to work properly. If someone knows how to do this, please respond here.
--Submitted by Jason Durand, design engineer, Plastech Engineered Products, Inc., Dearborn, MI
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The Importance of Adding Material and Removing Material Features - In CATIA V5, you should start working with Adding Material features such as Pad and Shaft. This way you will build a part by using material to which you can add or from which you can deduct. CATIA will not allow you to create a hole without having material from which to remove it. There is a way to work around it (if you really want to do it). Since CATIA V5 allows you to have multi-bodies in a single part, you can create a new body. CATIA does not check the content of the first body and assumes that there is material in another body with which you can work. Thus, you can create Removing Material features such as a hole. The tree list shows the hole, which is now visible graphically as a cylinder (for a simple hole). You will have two bodies; body 1 is the empty one and body 2 is the one with the hole (which displays as a cylinder). After you create a solid in your first body (body 1), you can perform a Boolean operation between the two bodies (1 and 2). To create the hole (body 2) in body 1, use the Join Boolean operation. This is in fact the opposite Boolean operation; you would think you need a Cut. Remember, when the first feature in the second body is a Removing Material feature, the Boolean operations interchange.
-- Submitted by Sridhar Paspuleti, QA Engineer, Geometric Software Solutions, Ltd., Bombay, India and edited by CATIA Digital Digest Advisory Board member, Benny Kronengold, Proficiency, Inc.
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CATIA V5 TIP
To store views or details such as user symbols, arrowheads, title blocks, etc., in a catalog, follow these steps:
Create a new drawing file.
Insert a new detail sheet-Insert >Drawing >Sheet>New Detail Sheet.
Create or paste your required elements in the empty view.
Create new views-Insert>Drawing>New View (any number). Then create symbols, title blocks, arrowheads, company logos, etc., in them.
Save your CATDrawing file.
Go to Save As and select Catalog as the file type to save.
To insert these details in any CATDrawing file, use the Catalog command and select the catalog file just created.
A preview appears of all the details in the file. You also can scale and rotate details while you insert them.
--Submitted by Manish Kohli, application engineer, EDS Technologies Pvt. Ltd., New Delhi, India
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Circular Pattern Function
I have been using the Circular Pattern function in the Part Design module lately to design molds. This function is easy to use and can save time. Once you have created the shape you want to reproduce, select the Circular Pattern function in the Transformation Features toolbox. In order to reproduce your shape, you have to select the Reference Direction by choosing a reference element that is oriented in the desired plane. One would logically think to select a plane parallel to the desired plane, but unfortunately this would lead to a bad reproduction. To create the proper pattern, you need to select a reference element with plane NOT parallel to the desired plane. The difference in angle between both planes can be as low as 0.01 degrees.
--Submitted by Jean-Francois Brunelle, mechanical engineer, SCP Science, Quebec, Canada
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CATIA V5 Embossing and Engraving
Many products are designed to include logos and text. In order to emboss or engrave text into or onto a part in V5, try variations of the following process:
Create a new CATDrawing. At the lower left corner of the sheet, type in the text that you want to put on your CATPart. You may have to experiment with flipping the text horizontally or vertically to get the results you want at the end of this process, so save the CATDrawing for later iterations. Be sure to choose a fairly simple font and appropriate size. Bold it if your fabrication process is not highly accurate. After saving the CATDrawing for later iterations, save again as a .dxf file. This will generate a series of geometric elements from the fonts. Close the CATDrawing that is open, and open the .dxf file that you just saved. Trap select and copy the geometric elements onto the clipboard.
Open the CATPart that you want to place the text on, and create a plane to place the sketch on. Note: I picture the plane as the lens of a projector, and place it slightly offset from the part, parallel to the surface onto which I am projecting. Select the sketcher icon, and paste the geometry from the clipboard.
Translate and rotate the geometry into position above the part, taking note of whether it is readable. If it is not readable (inverted), Undo the paste operation, and Open the CATDrawing. Invert the text in the CATDrawing and start the process over at Step 2. When the geometry is readable, use the Pad or Pocket routine in Part Design to emboss or engrave the text onto/into the CATPart.
For complex contour, create offset surfaces above and/or below the surface of the part and use the Up to Surface options in the Pad/Pocket Limit fields. If you would like to see this demonstrated real-time, visit my personal website: www.catiadr.com.
--Submitted by Ray Anderson, member of the CATIA Digital Digest advisory board,
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Disable CATIA Splash Screen - Tired of watching that CATIA splash screen image every time you start up CATIA? Disable it by going to your CATIA install directory. For example, look in {Your drive}:\CATIA\V5r8\intel_a\resources\graphic\splashscreens. Located in this directory is CATIASplash.bmp, and CATIASplash.avi (video) may also be there. Rename these files and you will no longer see the splash screen. Alternatively, if you would like to see another image / video at startup, you can copy it into this directory and name it CATIASplash.bmp (or .avi) and it will greet you when you start CATIA.
--Submitted by Mark Collett, designer / NC programmer, Michelin
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Using One Surface to Create Another That Will Update - If you want to use a surface edge to create another surface and be sure that the new surface will be updated if you replace the first surface, first create a boundary to be used with the new surface. Take the following steps to ensure quality as well as the ability to update:
Create extremum points at both ends the boundary. These should start and stop. It is important to use the point function extremum and not vertex. Create the boundary between the two extremum points.
When creating the new surface, use that boundary to meet your requirements.
These steps will ensure that the new surface is updated even if you replace the old surface with surfaces from another part. This will work, for example, to create external links. Try this method when you are waiting for a designer to give you direction, but you want to start the work because you have an idea about how it will look. Create your base surface and build additional surfaces using the method above and you will be free to replace your surfaces with surfaces suggested by the designer without losing links between the surfaces in your part.
-- Submitted by Bo P Nilsson, CAD project manager, Volvo Car, Goteborg, Sweden
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How to Create a Closed End Helical Spring
If you are having trouble creating springs in CATIA, here's one way to overcome the problem. Instead of using complex law curves, use the Helix command that already exists within the Generative Shape Design workbench. To create the spring, you need three helixes—one for the start and end of the spring and one for the center. By linking the parameters for the helix using the Formula Editor, you can create a spring that will update in height and pitch automatically. Create a new part file and add a reference line to act as the spring axis and a point at a distance from this where you want the spring to start. Using this point and the axis, create a helix using an S-type law, starting at 0 and ending at a pitch value that you want. Using the end point of this helix and the axis, create a second helix that follows on from the first one using the same pitch value and the height you want. Similar to the first helix, and using the end point of the second helix and the axis, create a third helix using an S type law, starting at the pitch value and ending at 0.You can join these curves together and create a rib using a section sketched at the start of the spring. At this stage, you have a closed-end helical spring. You need to link the heights, pitches and revolutions of each spring so that when you update an overall height parameter, the entire spring updates. This is customized to the spring parameters that you want.
--Submitted by Jonathan Cullen, Cadpo Europe
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Maintaining Layer Control When Using Sketcher - If you are trying to maintain strict layer control in V4 and a LAYER+LAYER+ANALYZE tells you that a layer is used in space, but you cannot find anything on it, it just might be a Sketcher element. (Note that elements in NS and NP do not show up in a LAYER+LAYER+ANALYZE.) Every constraint created in Sketcher is stored as what I would call an invisible space element. They can be moved into NS/NP, erased or transferred to different layers by using selections such as *SPC. But they are not visible. One way to check for them is to do an IDENTIFY+RENAME+LIST. The constraints shows up as things like *DIST, *LENG, *ANG, *REF, *IPAR, *RELE, *RELB, *COIN, *CONC, *TANG, *PERP, *PARA and others. They can be erased or moved as desired by using selections such as *RELE+*RELB+*IPAR or by using *USR to select all Sketcher elements at once.
--Submitted by Phil Hittepole, Gulfstream Aerospace, Appleton, WI
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Watch the points on your contour - In Catia V4 if you use the sketcher to design a contour that will be extruded or revolved and you put a point somewhere by mistake it's not a problem. You can revolve or extrude the contour without problems. But in Catia V5 it is a big mistake if you forget to make that point or line a construction point. I mean you can't do the task with a contour in Catia V5.
-- Submitted by Mihai Zecheru, GECI GmbH, Oberpfaffenhofen, Germany
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Changing draw mode elements into phantom thin lines easily by changing model colors. - Create your overlay, whether it is by overlay manager, model read,
/links or assembly. Go into the draw window (this will allow a large number or models to be graphically updated quickly). Go to model manage analyze. Select color for the models you want to change into phantom. Be sure it is not a standard color already used in the model that you want to stay solid lined. Go into a split horizontal screen (3D and draw). Make sure the models you want to show up phantom are all the same color. Go to auxview2; create view or update existing view. Go to graphic modify line type, select phantom and type *col and select an element you previously colored. Your lines will magically update to phantom while leaving the non-colored lines solid. Do the same thing for line thickness.
Option for advanced user: Go to standards and switch thickness and line type. Then go to graphic modify standard.
-- Daniel Wade, structural designer, Electric Boat Corp., Groton, Conn.
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CATIA HINTS & TIPS for DRAFTING GENERAL DRAFTING
1) Always use the correct start-up model. Start-up models enable your company to pre-define drafting standards for items such as Layers, Dimensions, Text Patterns, Formats etc. Your company should have start-up models for each environment that they use.
2) Minimize the use of fake dimensions. There are rare occasions when you have to use Fake Dimensions. Every drawing should be checked for Fake Dimensions using DIMENS2+MANAGE+VERIFY+FAKE DIMENSION. The Checker should validate the use of any fake dimensions.
3) Associate text with dimensions where applicable. Text (such as GD&T) can be associated to a dimension so that both entities will travel together when you need to modify the location of your dimension. TEXTD2+MANAGE+ASSOCIAT
4) Whenever possible do not dimension to points or non-AUXVIEW2 generated elements. Selecting these elements will create non-associated dimensions. This means when you modify your solid your dimensions will not reflect the change.
5) When positioning the leader of a note, INDICATE where the leader will end. SELECTING AUXVIEW2 GENERATED ELEMENTS MAY PREVENT THE VIEW FROM PROPERLY UPDATING.
6) When labeling views use TEXTD2 to add text before & after the AUXVIEW2 text. 7) If you want to add section locator text to the AUXVIEW2 section callout text, Use EXTD2+MANAGE+ASSOCIAT. AUXVIEW2
8) Solids must ALWAYS be updated before views can be successfully created. By far the most common reason for unsuccessful extractions in AUXVIEW2 is either poorly constructed solids or solids that havent been updated.
9) Make the solid an UNSMART solid to enhance AUXVIEW2 performance. Unsmarting your solid can reduce update time from 25 to 50%. Design and model with SMART solids, Draft with UNSMART solids.
10) Use AUXVIEW2 to monitor the quality of the solid as the solid design progresses.
11) Use AUXVIEW2 generated text for view name & scale.
12) Modify AUXVIEW2 section lines after views have been detailed.
13) Max number of background planes (views) allowed in a CATIA model; approx. 256.
14) Use /LINKS to manage the models in your session that created your drawing SAVING FILES
15) Unsmart all solids This greatly reduces the file space required and makes it
easier for other designers who are using your model in an assembly.
16) Update all solids Ensuring that your solids are all updated, including DETAIL workspaces, will help to minimize crashing and improve Auxview2 performance.
17) Update all views This ensures that your views show the latest changes to
the solids. These tips were supplied by TBM Technologies
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CATIA Model Clean Up
There are some cases when a CATIA model does not respond properly to standard functionality. This often occurs if the model is the result of a translation. If you determine that the problems are model specific, the following clean-up routine will usually restore your model to good health.
1. Erase all unnecessary elements. Use LAYER + FILTER + APPLY (all) to turn on all layers Use ERASE + ERASE to delete all unnecessary elements Use ERASE + NO
SHOW to delete all unnecessary elements in no-show Use ERASE + NO PICK to delete all unnecessary elements in no-pick
2. If your model contains SOLIDS, ensure that they are all updated. Use SOLIDE +UPDATE
3. RUN the clean macro At the command line, type /cln and hit enter Select yes to execute If errors are detected, select DELETE, MODIFY, PACK, ALL Select yes to execute. Repeat a second time if all errors were not fixed
4. Use IDENTIFY + RENUMBER + ELEMENT + AUTO ID (yes to execute) Use IDENTIFY + UPDATE (yes to execute)
5. Use ERASE + PACK (yes to execute)
If you are still having problems and are sure that they are Model dependent, try the following: Use the MERGE function to merge all of the required elements into a clean model.
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System Tip - Kill It! - When a graphical program locks up on your system, it could be a hassle to kill the program. The kill command will do it, but you
need to know the Process ID of the command (sometimes apps will have many different ID's of which all need to be killed).
A much easier way to do this would be to run xkill. This program simply asks you to click on the window you wish to kill and you are done. Go to a UNIX
prompt and type: xkill.
-- Courtesy of the CATIA Users of Central Ontario, www.ca.geocities.com/catiawebca
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V4 CATIA Tip - On those rare occasions that you need to put boundaries on all the faces of a surfaced model (that does not have a volume) do the following:
Move all the data off the screen Select F4, and switch Virtual to off Select BR Select CURVE1-BOUNDARY Type MULTI-SEL *FAC Reframe data
-- Submitted by Gary Moore, lead product designer, Kautex Texron NA
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Beating the Law - If you have been given the task of creating a surface that smoothly transitions from one closed curve to the next while controlling the
intermediate cross-sections, CATIA Version 4's Surfacing Laws are for you. The concept is to match
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