xor overall comprehension

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Training Material

Basic Course

- Overall Comprehension -

July, 2010

Copyright INUS Technology, Inc.

All rights reserved


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Copyri ght INUS Technology, Inc. Al l ri ghts reserved.

Rapidform User Guide & Tutorial

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1. Overall Comprehension1.1 Terminology

Modela single document made up of mesh or features Feature individual shapes and geometric elements that construct a

model

Mesh triangulated scan data or FEM mesh data that contains poly-face, poly-vertex, poly-edge or boundary

Region Group a group or region made up of poly-faces. Regionsassist in alignment of the mesh data to the global coordinate systemand in the selection of a region of interest for extracting the designintent and converting it to a surface.

Solid body a B-rep entity that has both geometry and topologyinformation


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Surface bodya zero thickness 3D entity with edge boundaries

Sketch a set of 2D objects (line, rectangle, circle, arc, ellipse, spline,etc) on a plane, a face or a planar cross-section of the mesh

Geometric Constraints Geometric constraints constrain the relation between sketch

geometries. Geometric relations are the rules that control the behavior of sketch

geometry. Geometric relations help capture the design intent.


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3D Sketcha set of 3D curves in space or on mesh faces

Ref. Geometrya geometry used to assist in creating features

Redesign Assistant for design intent extraction

Ref. Point :extraction, circle/sphere center, projection, intersection Ref. Vector :extraction, cylinder/cone axis, revolving/extrusion axis,

Intersection Ref. Plane : extraction, projection, offset, rotation, tangent,

orthogonal, mirror Ref. Polyline : intersection, projection, silhouette, fillet, sweep, bead

line, pipe, parting line, boundary, revolving/extrusion profile Ref. Coordinate :extraction, intersection, tangent


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1.2 User Interface

1.3 ModeThe mode is a group of working environment for entities such as mesh, region, and


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sketch. If you enter a mode, icons on the toolbar are changed related to the mode.For example if you enter the Mesh mode, functions that are applicable to the currentmesh appear on the toolbar. When you exit the mode, you can confirm all changes orcancel them.

Mesh In Mesh Mode, you can heal and edit mesh boundaries, andPoly-Faces/Vertices. You can regenerate mesh triangles for FEM, RPor Machining. You also can edit the color or texture of a mesh usingvarious texture edit tools.

Region Group In Region Group Mode, you can automatically dividefeatures into colored region as well as manually edit the regions into

groups.

Point Cloud In Point Cloud Mode, You can edit or enhance point

clouds. You can also remove noisy poly-vertices and perform samplingor smoothing operations.

Mesh Sketch In Mesh Sketch Mode, you can create 2D sketches(lines, arcs, circles, etc.) based on a mesh. These sketches are usedfor creating a solid or surface body.

Sketch In Sketch Mode, you can create 2D sketches (lines, arcs,circles, etc.) without a mesh. This Sketch Mode resembles as other 3D

CAD modelers.

3D Mesh Sketch In 3D Mesh Sketch Mode, you can create 3Dcurves on a mesh. Curves are automatically projected onto the mesh.

3D Sketch In 3D Sketch Mode, you can create 3D curves in 3Dspace. These curves can be used for creating a surface or solid body.

1.4 Hot Key

Ctrl + 1, 2, ,9, 0 Show/Hide entities (mesh, region, , coordinate)

F12Toggles key to maximize the Model View and hide other panels.

Ctrl + SpaceRepeat the last command.

Shift + Z, XToggle key to Zoom Area, Zoom Previous.

Ctrl + F, W Zoom Fit, Toggle key to pop-up the PIP (Picture In


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Picture) window.

F5, F6, F7, F8Mesh display mode.

Shift + A, N, ISelect All/None/Inverse.

Ctrl + Z, YUndo, Redo.

DelDelete selected entities.

Ctrl + Shift + AAlign view to a plane, a face, a sketch plane, a edge,a poly-face, a curve, etc.

1.5 Smart Selection & Select Filter

Using Select Filter Toolbar

Limits selection by the entity type.

Smart Selection

Default selection when no filters are specified. Works smartly according to the mode and the current situation.

Selection from overlapped entitiesHolding down the left mouse button for a moment and releasing, then listbox which shows overlapped entities under the mouse position appears.

You can select an entity from the list box.

1.6 Accuracy Analyzer Analyzes the accuracy of CAD model to the mesh data. Monitors the deviation between the mesh and features generated


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or to be generated. Displays a color map or displacement vector. Guides modeling within acceptable tolerance using intuitive

tolerance settings.

In Default mode behavior Displays the deviation betweensurface/solid bodies and the mesh.

In Mesh mode behavior Displays the deviation between the originalmesh and the modified mesh in the mode.

In Mesh Sketch mode behavior Displays the deviation betweensketch entities and section segment of the mesh/point cloud.

In Sketch mode behavior Displays the geometric property of sketchentities.

In 3D Mesh Sketch mode behavior Displays the deviation andgeometric property of 3d sketch entities.

In 3D Sketch mode behavior Displays the deviation and geometricproperty of 3d sketch entities.


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1.7 Aligning Mesh to Coordinate System

How do we define a modeling coordinate system?

Using too few feature specific vectors to derive the axes of

global modeling coordinate system may lead undesirable

deviation error.

3 ways of controlling deviation error1. Auto-alignmentThe command finds an optimal global

coordinate system using all featurespecific vectors which can minimize thepeak deviation error and also the sum ofit.


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2. Create vectors feature-by-featureInteractively search for directionalvectors as CAD modeling feature

parameters using various automated

tools. Each vectors axis may deviatefrom the axes of the global coordinatesystem.

3. Mesh-fit surfacingGive up the parametric feature modelingwhen the deviation is the primary concern.

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