Freecad Sketch On Curved Surface

I may want to do images of each part or an exploded view or something. Sometimes when you are modeling in SketchUp, you want to create model items that follow a curve. Nuovo rilascio dopo quasi 2 anni dall'ultimo per FreeCAD. If the curve is reshaped, the surface profile is also updated. xml then has visual representation details of objects. If DipTrace doesn't place the drawing into the PCB editor in the same location (identical native origin), then I would suggest avoiding that CAD program. Make this possible to do via code. Welcome to ALL3DP’s tutorial on 3D printing letters or text with FreeCAD. FreeCAD supports a wide variety of drawing formats and CAD formats. user can enter any distance from original surface to. Adjust angle and side in the Tasks tab. Make a line that goes from the intersection of the involute curve and the pitch diameter circle (D) to the center of the gear. …This means that, unlike a cylinder,…which is referred. when freecad opened, the screen program showed a “start center” where i could access a “getting started” guide, jump to one of the most common workbenches, or see the latest news from the freecad world. You may need to check "reverse offset" to cut into the solid. Est hecho principalmente para ser impresos en un solo documento grande, as que, si usted est leyendo esto en lnea, usted lo prefiere, puede dirigirse directamente a la ayuda en lnea la versin, que es ms fcil de navegar. I am sure if i had a factory and large assembly lines, it is perfect. 5D cam program. Hello, Is it possible to take a cylinder, or any curved surface, and create a sketch onto it so that I can extrude and pocket etc. OpenCASCADE in contrast only has to replay FreeCAD models, and there are modulo zero of those, and actually zero paying customers. If DipTrace doesn't place the drawing into the PCB editor in the same location (identical native origin), then I would suggest avoiding that CAD program. Note: sketches for almost all features (except pads) need a support face. Parametric modeling allows you to easily modify your design by going back into your model history and changing its parameters. 5D cam program. 00001 /***** 00002 * Copyright (c) Jürgen Riegel (juergen. Our growing library of tutorials take you step by step through different topics to help you really comprehend what you want to learn. Use the newly added Tech Draw Workbench (Please see " FreeCAD: Creating 2D drawings from a 3D shape "). The lateral surface must be divided into curved and non-curved triangles. In the curve panel, you have two search property (Taper object and Bevel object) The Bevel object controls the shape of the bevel. Manual de Freecad. somewhat more ?. #!/usr/bin/env python # -*- coding: utf-8 -*- # # sheet_ufo. While modelling the Class 43 IC 125 HST locomotive I decided to create an object data base as modular as possible: three basic objects (the cabin, the body, the back end), each of them in multiple, different version. Sketchup I find is faster for me right now but solidworks has more options. en/fr/de/it. FreeCAD: pad,extrusions and sketches detachment from objects and positioning fr/de/it. When creating your wall sweep, before you hit the green check mark to exit the sketch mode, go to create tab and make a void form and cut your wall sweep. The Extrude Cut feature has several ways to end the cut. user can enter any distance from original surface to. FreeCAD Forum. Otherwise, the surface may build, but the tangency controls will vanish. Document the hook that devs need to call in their own workbenches. ISOparametric Curve Surf と TRAnslate obj (VC) で 曲面から各セクションのカーブを抜き取った! それだけです。. 3) Test how DipTrace imports a 2D DXF drawing from the CAD program being evaluated by creating a board outline with a defined native origin (0,0). The quality of a great surface lies within the curve that defines it. Community per blenderisti italiani. It happened to me a few times to have a drawing in svg Inkscape format, to be imported into FreeCAD as a starting 2D shape to design 3D objects. FreeCAD switches to the Sketcher workbench (Figure 2), showing an appropriate set of tools. I just want a simple 2. Using a blind cut extrude specify the direction, depth, and draft angle of the cut, as well as selecting a through all in the other direction to eliminate any concave parts of the curve. Pick the 'Curves' to open that. Use the "Offset From Surface" option then specify the depth you want. Beim Entfernen eines Knoten kann die entstehende Kurve von der ursprünglichen abweichen. A shape extrusion to a concave surface, where the sketch is larger. FreeCAD switches to the Sketcher workbench (Figure 2), showing an appropriate set of tools. Split faces, trim solids, and split solids. DraftSigh Dimensions - Make drawing useful for customer or manufacturer. You can edit the vertical # and angular offset of the text in the TextOnCylinder properties. You may need to check "reverse offset" to cut into the solid. Moving the white lines of the sketch sculpts the blended surface. Is it possible to sketch on a curved surface?Then how? The Computer-Aided Design ("CAD") files and all associated content posted to this website are created, uploaded, managed and owned by third party users. but after that i couldn't make a circular pattern of the hole throughout the curved surface of the cylinder. Freecad Sketch. The help and development forum of FreeCAD is there a similar function to wrap a sketch onto a curved surface? Similar to how Solidworks handles. You won't need any previous knowledge on working with a CAD program; all the instructions you need are detailed below. #!/usr/bin/env python # -*- coding: utf-8 -*- # # sheet_ufo. Use the newly added Tech Draw Workbench (Please see " FreeCAD: Creating 2D drawings from a 3D shape "). FreeCAD is a 3D modeler specializing in parametrics. List of free 2D a 3D CAD software for general use. How to project sketch on non planar surfaces? Spline on Surface This will let you sketch a spline which follows a surface. Tinkercad is a free, easy-to-use app for 3D design, electronics, and coding. The direction of the surface normal of the plane determines which piece gets left. Note: sketches for almost all features (except pads) need a support face. Disponibile per il download FreeCAD 0. I created a design to do so – seven lines along the curve’s back surface, from which I clear foam. It happened to me a few times to have a drawing in svg Inkscape format, to be imported into FreeCAD as a starting 2D shape to design 3D objects. The spline sketch tool creates a smooth curve through the position of control vertices, or CV’s. when freecad opened, the screen program showed a “start center” where i could access a “getting started” guide, jump to one of the most common workbenches, or see the latest news from the freecad world. Flash video. The lateral surface must be divided into curved and non-curved triangles. xml then has visual representation details of objects. A shape extrusion to a concave surface, where the sketch is larger. A wide range of Engineers, Surveyors, Contractors, Architects, Designers, Manufacturers, Event Management Consultants, Property Developers and even Air-conditioning companies rely on its strength and renowned ease-of-use. A surface body is often used as a split tool for the Split. One of the biggest difficulty for new users of FreeCAD, is to know in which workbench to find a specific tool. I don't think "equal to" will work unless the circumference is literally exactly the exact same down to the final zero. How to Wrap/Project Sketch on Curved Surface/Curved. One of the biggest difficulty for new users of FreeCAD, is to know in which workbench to find a specific tool. Tutorial 4 - Convert a mesh to multiple surfaces with quad face. Any cross-sectional shape can be extruded along the curve with this sweep method. Don't use a 3D sketch. i opted for reading the getting started guide first. Create a 3D sketch and convert the edges created from the split line. Approximate a set of points to a B-Spline curve or surface Create a parametric blending curve between to edges, with up to G2 continuity Comb Plot tool to visualize the curvature flow of an edge Zebra tool creates zebra stripes environment texture for surface inspection; Nurbs surface editor to edit a Nurbs surface by moving the control vertices. …At the end of that video, I altered the size…of the quarter circles, and I also sketched a version…that connects the sections with curves…rather than straight lines. Whatever that means. en/fr/de/it. I may want to do images of each part or an exploded view or something. The spline sketch tool creates a smooth curve through the position of control vertices, or CV’s. Freecad Sketch. NACA 5 digit airfoil generator Create NACA 5 digit airfoil sections to your own specification for use with the tools. of the 2D curve on the. I just want a simple 2. Class Index. I tried to make a 3D model of a 3 axis gyro stabilised mount for smartphone's using FreeCAD. It is the native format for several CAD packages including AutoCAD. FreeCAD, creating on outline in the Sketcher workbench. What it does is to roll around a cylindrical surface a sketch or a text string. Surfaces can be associative while solids cannot. Make a line that goes from the intersection of the involute curve and the pitch diameter circle (D) to the center of the gear. If surface associativity is on when a surface is created, the surface maintains a relationship with the curve from which it is was generated (even if the curve is the subobject of another solid or surface). The same concepts applies when working from Python code. Either creating aesthetic surfaces (class A surfaces) that also perform a function; for example, car bodies and consumer product outer forms, or technical surfaces for components such as gas turbine blades and other fluid dynamic engineering. types like a BSpline curve or surface. or even some more complex types like a B-Spline curve or surface. But these are grouped as 3 distinct line bodies, rather than the 48 edges it contains. Welcome to ALL3DP’s tutorial on 3D printing letters or text with FreeCAD. Note: sketches for almost all features (except pads) need a support face. In other words, the edges and faces appear unaltered. These curves are ideally created and controlled through splines. Intervista curata da IRRIVERENDER ARCH. Gmsh is an open source 3D finite element mesh generator with a built-in CAD engine and post-processor. Anyway, I’ve now finished drawing the parabolic curve. DraftSigh Dimensions - Make drawing useful for customer or manufacturer. Joined: Fri, Sep 3, 2010 0 Posts. xml file has all geometric and parametric objects definitions. Freecad's own main file format is FreeCAD Standard file format (. Pick the 'Curves' to open that. Tutorial 5 - Use Fix button to smooth the wavy surface in _RsMesh2Surfs. Examples include the plane, the curved surface of a cylinder or cone, a conical surface with elliptical directrix, the right conoid, the helicoid, and the tangent developable of a smooth curve in space. Naturalmente le modifiche sono sempre tante. I tried to make a 3D model of a 3 axis gyro stabilised mount for smartphone's using FreeCAD. Problem taken Master Sketch - Duration: 56:47. Select a cylinder and one or more # ShapeStrings to place on the cylinder. If surface associativity is on when a surface is created, the surface maintains a relationship with the curve from which it is was generated (even if the curve is the subobject of another solid or surface). SketchUp is a software that architects, interior designers, and scale modelers. Tim Killen has posted a great tutorial at Finewoodworking. Ha Gei 19,691 views. Can anyone help? Thanks for your. …The resulting surface is referred to…as a compound curve surface. Use the newly added Tech Draw Workbench (Please see " FreeCAD: Creating 2D drawings from a 3D shape "). en/fr/de/it. How to Draw in 3D. Is it possible to sketch on a curved surface?Then how? The Computer-Aided Design ("CAD") files and all associated content posted to this website are created, uploaded, managed and owned by third party users. As the lowest pattern rectangle actually represents a surface on the inside of a pipe. It's not a SolidWorks 'Surface', just a curved surface. Once imported inside FreeCAD, a Bezier’s curve path is a “path” object which corresponds to a unique “edge” object when downgraded. How to Wrap/Project Sketch on Curved Surface/Curved. The downside, of course is that a nice-looking dome in SketchUp will end up being a bunch of facets (just like the STL file). …At the end of that video, I altered the size…of the quarter circles, and I also sketched a version…that connects the sections with curves…rather than straight lines. 3) Test how DipTrace imports a 2D DXF drawing from the CAD program being evaluated by creating a board outline with a defined native origin (0,0). This is the FreeCAD manual. Tutorial 4 - Convert a mesh to multiple surfaces with quad face. FreeCAD also supports multiple plug-ins. Anyway, I’ve now finished drawing the parabolic curve. FreeCAD Forum. 00001 /***** 00002 * Copyright (c) Jürgen Riegel (juergen. Welcome to ALL3DP's tutorial on 3D printing letters or text with FreeCAD. If the curve is reshaped, the surface profile is also updated. If surface associativity is on when a surface is created, the surface maintains a relationship with the curve from which it is was generated (even if the curve is the subobject of another solid or surface). Salve, vorrei sapere come posso esportare un modello fatto in FreeCAD a Blender 2. The simplest method of fitting a set of data points with a B-spline curve is the global interpolation method. Is it possible to sketch on a curved surface?Then how? The Computer-Aided Design ("CAD") files and all associated content posted to this website are created, uploaded, managed and owned by third party users. FreeCAD: pad,extrusions and sketches detachment from objects and positioning fr/de/it. en/fr/de/it. FreeCAD supports a wide variety of drawing formats and CAD formats. Sketchup I find is faster for me right now but solidworks has more options. The structure of FreeCAD is modular. Inverse kinematics of a 6 axis articulated. While modelling the Class 43 IC 125 HST locomotive I decided to create an object data base as modular as possible: three basic objects (the cabin, the body, the back end), each of them in multiple, different version. Either creating aesthetic surfaces (class A surfaces) that also perform a function; for example, car bodies and consumer product outer forms, or technical surfaces for components such as gas turbine blades and other fluid dynamic engineering. Recipe for very simple manifold-like variable section pipe You need (at least) three sketches: trajectory constructed from tangent segments, normal to section sketches, section sketch at the start of trajectory, section sketch at the end of trajectory. but after that i couldn't make a circular pattern of the hole throughout the curved surface of the cylinder. You won't need any previous knowledge on working with a CAD program; all the instructions you need are detailed below. - Blender Italia. The cover will be curved and hollowed out with the Revolution feature. This is shown below. FreeCAD: pad,extrusions and sketches detachment from objects and positioning fr/de/it. What I'm doing wrong ? How to improve the smoothness of the curved surface (eg. dxf) import/export. Draft Workbench and Extrude to make Curved Shapes. It reminds me of my own interest in mapping 2D images from Illustrator into PS in order to mock up a design on a mug or other curved surface. Select a cylinder and one or more # ShapeStrings to place on the cylinder. user can enter any distance from original surface to. If the curve is reshaped, the surface profile is also updated. but after that i couldn't make a circular pattern of the hole throughout the curved surface of the cylinder. SpaceClaim has things the right way round to built a reliable CAD system: direct modeling X still v good b-rep kernel (ACIS). FreeCAD comes with a 3D viewer that renders 3D scenes faster. Revolve this line around one of the two circles to create a cone surface. Once imported inside FreeCAD, a Bezier’s curve path is a “path” object which corresponds to a unique “edge” object when downgraded. The direction of the surface normal of the plane determines which piece gets left. NACA 4 digit airfoil generator Generate NACA 4 digit airfoil sections to your own specification and use them in the airfoil comparison and plotter. Code at the end of the post. It's optimized primarily for the design of real life objects of any size and shape. scdoc file may contain any combination of design versions, associated drawing sheets, and 3D markup slides. …The resulting surface is referred to…as a compound curve surface. I would like this to be listed as the 48 edges instead. 13 Build 1828 ソフトウェア情報の交換、導入、教授およびダウンロード,FreeCAD は高度なモーションシミュレーション機能を備えた基本的な 3D CAD です。より洗練されたパッケージを使用する前に 3D CAD とモーションシミュレーションを無料で学ぶことに興味のあ、ソフトウェア教育. Manual de Freecad. ncluye las partes esenciales de la wiki de documentacin FreeCAD. The drawing workbench described this article has been deprecated since version 0. If that doesn't suit you, our users have ranked more than 100 alternatives to Autodesk AutoCAD and loads of them are available for Windows so hopefully you can find a suitable replacement. Note: sketches for almost all features (except pads) need a support face. Any cross-sectional shape can be extruded along the curve with this sweep method. if str (edge. It's optimized primarily for the design of real life objects of any size and shape. Hi, I'm designing a part, and am having trouble creating a plane tangent to a curved surface. Nuovo rilascio dopo quasi 2 anni dall'ultimo per FreeCAD. Either creating aesthetic surfaces (class A surfaces) that also perform a function; for example, car bodies and consumer product outer forms, or technical surfaces for components such as gas turbine blades and other fluid dynamic engineering. front,top,right,back and then attach the views into their respective planes, this will be the base to start your modeling. CHAUDHARY) DEDICATION Dedicated to Our Beloved parents Smt. This is shown below. (Choose surface revolve). - We touched briefly on the process…of creating curved surfaces using sectional development. From free-cad. save Save FreeCAD. The information will be associated with the Body in the tree view on the left. FreeCAD has a complete Graphical User Interface based on the famous Qt framework, with a 3D viewer based on Open Inventor, allowing fast rendering of 3D scenes and a very accessible scene graph representation. Wait… what?! Yep, that’s going to happen a lot: in FreeCAD you often jump back and forth between sketches and 3D models. FreeCAD switches to the Sketcher workbench (Figure 2), showing an appropriate set of tools. By downloading and using any ARCAT CAD detail content you agree to the following [license agreement]. FreeCAD is a full GUI application. Note: I do not work for Omega, nor do I hold any rights to this image nor to its accuracy. 3D drawings use optical illusions to make it appear that an image has depth. When creating your wall sweep, before you hit the green check mark to exit the sketch mode, go to create tab and make a void form and cut your wall sweep. Wait… what?! Yep, that’s going to happen a lot: in FreeCAD you often jump back and forth between sketches and 3D models. Suppose we have n+1 data points D 0, D 1, , D n and wish to fit them with a B-spline curve of degree p, where p = n is an input. Select a cylinder and one or more # ShapeStrings to place on the cylinder. Question Good Free (Low Cost) 3D CAD for RC? CAD/CAM. The direction of the surface normal of the plane determines which piece gets left. Inside Inkscape, very often the shapes are path objects made of Bezier's curves. Pick the first and the last curve with the 'Shift'' key down, this will select all of the curves. Beim Entfernen eines Knoten kann die entstehende Kurve von der ursprünglichen abweichen. xml then has visual representation details of objects. How to Wrap/Project Sketch on Curved Surface/Curved. Gmsh is an open source 3D finite element mesh generator with a built-in CAD engine and post-processor. Select a cylinder and one or more # ShapeStrings to place on the cylinder. If surface associativity is on when a surface is created, the surface maintains a relationship with the curve from which it is was generated (even if the curve is the subobject of another solid or surface). You can click on any face (surface) of your three-dimensional object and click on ‘create a sketch’. In lesson 5 of this FreeCAD tutorial, you will create the cover of your box. The cover will be curved and hollowed out with the Revolution feature. Make a line that goes from the intersection of the involute curve and the pitch diameter circle (D) to the center of the gear. Comparing working with FreeCad and AutoCad or Solidworks, I found the knowledge is very transferable and making moving to others much easier. Choose x-y as the reference axis. - Blender Italia. These curves are ideally created and controlled through splines. All workbenches at a glance. Sometimes when you are modeling in SketchUp, you want to create model items that follow a curve. Tutorial 6 - Convert a mesh to multiple surfaces with trimmed surface. NACA 5 digit airfoil generator Create NACA 5 digit airfoil sections to your own specification for use with the tools. It's a little bit frustrating that you don't seem to be able to have multiple "linked" 2D sketches. To set a point and continue drawing more curved segments, you can click and hold the mouse cursor to set a point and then, without releasing the mouse button, drag the cursor to pull out another curvature control, and repeat Steps 1–3 until you’re done adding curved segments. Salve, vorrei sapere come posso esportare un modello fatto in FreeCAD a Blender 2. 13 Build 1828 ソフトウェア情報の交換、導入、教授およびダウンロード,FreeCAD は高度なモーションシミュレーション機能を備えた基本的な 3D CAD です。より洗練されたパッケージを使用する前に 3D CAD とモーションシミュレーションを無料で学ぶことに興味のあ、ソフトウェア教育. 5 KB) I am attempting to add curved walls to the attached drawing so that I essentially have a pyramid-like shape with walls that follow the arcs I have drawn, but I can’t seem to figure out how to do it. The quality of a great surface lies within the curve that defines it. If surface associativity is on when a surface is created, the surface maintains a relationship with the curve from which it is was generated (even if the curve is the subobject of another solid or surface). Note: sketches for almost all features (except pads) need a support face. Community per blenderisti italiani. This is shown below. Don't use a 3D sketch. For my intentions, that makes the surface unusable. I don't think "equal to" will work unless the circumference is literally exactly the exact same down to the final zero. Recipe for very simple manifold-like variable section pipe You need (at least) three sketches: trajectory constructed from tangent segments, normal to section sketches, section sketch at the start of trajectory, section sketch at the end of trajectory. Use the newly added Tech Draw Workbench (Please see " FreeCAD: Creating 2D drawings from a 3D shape "). Draft Workbench and Extrude to make Curved Shapes. Then switch your Workbox to. #!/usr/bin/env python # -*- coding: utf-8 -*- # # sheet_ufo. To set a point and continue drawing more curved segments, you can click and hold the mouse cursor to set a point and then, without releasing the mouse button, drag the cursor to pull out another curvature control, and repeat Steps 1–3 until you’re done adding curved segments. Create a new sketch on the XY plane. In other words, the edges and faces appear unaltered. i tried to create a plane tangent to the curved surface of a cylinder , then i drew a circle and cut extrude that. It's a little bit frustrating that you don't seem to be able to have multiple "linked" 2D sketches. Recipe for very simple manifold-like variable section pipe You need (at least) three sketches: trajectory constructed from tangent segments, normal to section sketches, section sketch at the start of trajectory, section sketch at the end of trajectory. The downside, of course is that a nice-looking dome in SketchUp will end up being a bunch of facets (just like the STL file). Naturalmente le modifiche sono sempre tante. The Taper object controls the width (radius) of the curve. There is a fair amount of work to setup a blended model, but the payoff is that all the work is parametric, so one can go back and edit the initial overall sketch, and everything, including the blends will update. en/fr/de/it. Est hecho principalmente para ser impresos en un solo documento grande, as que, si usted est leyendo esto en lnea, usted lo prefiere, puede dirigirse directamente a la ayuda en lnea la versin, que es ms fcil de navegar. The Extrude Cut feature has several ways to end the cut. In general, if you want to BD between an open (poly) surface and a solid to work as if it was two solids, the surface normals of the open object should point towards the solid object, as if it were also a solid. A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | _. They will turn green in the drawing window. In the Structure tree move the new 'Surface' to the top 'Component' The Step file will now be empty and can be deleted. Create a new sketch on the XY plane. NACA 4 digit airfoil generator Generate NACA 4 digit airfoil sections to your own specification and use them in the airfoil comparison and plotter. Now use the 'Fill' command. SpaceClaim has things the right way round to built a reliable CAD system: direct modeling X still v good b-rep kernel (ACIS). If I'm reading your post correctly, you would like to only cut a specified distance into your curved solid. How to Draw Curved Surfaces in SketchUp. This manual way of designing allows designers to create precise objects. Then switch your Workbox to. …The resulting surface is referred to…as a compound curve surface. Shyama Devi Late Sri Ram Pujan Chaudhary. It is intended for surveyor produced drawings like the one to the right here (click the image for more details), but is equally suited to any 2D drawing where the Z levels are represented as text items. SketchUp is mostly about planes, edges, and surfaces. Read this article to learn how. If DipTrace doesn't place the drawing into the PCB editor in the same location (identical native origin), then I would suggest avoiding that CAD program. You can create a curved surface in SketchUp fairly easily though. Check out the part I've attached and you'll understand what I mean Sketch12 is presently a flat sketch, but I'd like it projected against the surface of the curved sight glass. The Extrude Cut feature has several ways to end the cut. Community per blenderisti italiani. Curve Global Interpolation. FreeCAD, creating on outline in the Sketcher workbench. Tutorial 1 - Convert a mesh to a surface. Vertical Arm. Make a line that goes from the intersection of the involute curve and the pitch diameter circle (D) to the center of the gear. Many people use the SketchUp program but few people are aware of its technical limitations and oddities. Freecad Sketch. com for how …. This technique can make any drawing come to life. Selecting the Points. I would like this to be listed as the 48 edges instead. Problem taken Master Sketch - Duration: 56:47. Motion simulation using DXF file import of a hydraylic ramp drawing. Suppose we have n+1 data points D 0, D 1, , D n and wish to fit them with a B-spline curve of degree p, where p = n is an input. walls of a cylinder) ?. Once imported inside FreeCAD, a Bezier’s curve path is a “path” object which corresponds to a unique “edge” object when downgraded. Tutorial 6 - Convert a mesh to multiple surfaces with trimmed surface. The simplest method of fitting a set of data points with a B-spline curve is the global interpolation method. There is a fair amount of work to setup a blended model, but the payoff is that all the work is parametric, so one can go back and edit the initial overall sketch, and everything, including the blends will update. You can always try FreeCAD. Code at the end of the post. On the right in the following figure, you see a curve made of. What it does is to roll around a cylindrical surface a sketch or a text string. Recipe for very simple manifold-like variable section pipe You need (at least) three sketches: trajectory constructed from tangent segments, normal to section sketches, section sketch at the start of trajectory, section sketch at the end of trajectory. Shyama Devi Late Sri Ram Pujan Chaudhary. Freecad Sketch. The Taper object controls the width (radius) of the curve. They will turn green in the drawing window. Tue, Apr 28, 2015 at 5:13:45 PM | Revit 2015, Curved Wall Sweep Model Surface Pattern Inconsistant #6. Create a 3D sketch and convert the edges created from the split line. At least within the FreeCAD software, no attempt is made to generate NURBS or other surface types beyond a flat plane in the IGES format.