Slide 1Creating a new sketch with a Closed ProfileSelect a Plane for SketchingSketch on Plane, Draw the Closed Profile using Draw CommandsSlide 5Autodesk Inventor: Constraint Display (F8)Geometric Constraints - DetailsAdding Parametric DimensionsPlacing Parametric DimensionsSketch GraphicsFirst Sketch – Use the Line CommandDrawing TipsCommon Closed Profile ErrorsThe Auto DimensionSlide 15Formulas in Dimensions (1)Variable Names and Formulas (2)Formula Driven Dimensions (3)ActivityGeometric Constraints - DetailsConstraintsConstraintsApplication OptionsPlacing Size DimensionsPlacing Location DimensionsPlacing Angular DimensionsPlacing DimensionsDimensioning ToolsDimensioning Tools1SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of Technology1Sketching in Autodesk InventorStarting a SketchBasic Geometric RelationshipsParametric DimensionsVariablesAdditional Relationship/Dimensioning Slides2SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of TechnologyCreating a new sketch with a Closed Profile3SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of TechnologySelect a Plane for Sketching•Select a work plane (often one of the default work planes in the browser or one of the faces of a feature)exampleA new sketch icon appears in the browser with the sketch tab active.4SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of TechnologyDrawing section ofSketch TabSketch on Plane, Draw the Closed Profile using Draw CommandsLine DimensionsIn Status LineStatus LineLine DimensionsIn Heads Up Display (HUD)5SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of TechnologyA Closed Profile needs to be fully constrained with constraints addedAdding geometric constraints reduces the number of parametric dimensions that must be added to fully constrain a closed profile.1. Autodesk Inventor adds many geometric constraints while drawing the closed profile.2. Delete any geometric constraints mistakenly placed during the drawing of the closed profile. Select line - Highlight - Delete3. Add additional geometric constraints as required. 4. Add all necessary dimensions to fully constrain the closed profile.5. Look at the bottom right hand corner to see if your sketch is fully constrained. Always fully constrain your sketches!!6SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of TechnologyAutodesk Inventor: Constraint Display (F8)Autodesk Inventor shows “Constraint Icons” to display geometric constraints7SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of TechnologyGeometric Constraints - DetailsUsed with dimensions to control the size, shape, and position of the profile.8SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of TechnologyAdding Parametric Dimensions•Parametric Dimensions are used to label and control the size, location, and orientation of 2-D elements.•Parametric Dimensions and geometric constraints should be placed on every sketch. Until the geometry is constrained, it can change.9SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of TechnologyPlacing Parametric DimensionsDimensioning Commands–General Dimension-used to apply all parametric dimensions–Auto Dimension – best if used to add geometric constraints only10SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of TechnologySketch Graphics Adding constraints and dimensions removes degrees of freedom (DoF) in the sketch. Arrows are removed to show these changes.Dragging the corner point of the sketch to the 0,0,0 point projected into the sketch restricts how the sketch entities can move. Not required, but is a good practice.Red DoF arrows are removed. Sketch entities change color showing that they are constrained.Colors shown will change based on the color scheme you are using, but there will always be a difference between constrained and unconstrained entities.Driven dimensions are shown with parenthesis. They are reference dimensions driven by other dimensions. They will update based on the other driving dimensions.In this example, changing the 10 dim to 12 would cause the driven dimension to change to (13) because the overall width is driven by the 25 dim at the bottom.The fx: 25 indicates that the dimension is linked to another dimension or is driven by a function.Display properties of sketch dimensions can be changed by right-clicking in the graphics window and selecting a new style form the “Dimension Display” fly out menu.The expression option will show the name of the dimension and the formula driving it.11SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of TechnologyFirst Sketch – Use the Line Command12SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of TechnologyDrawing TipsRestart sketch commands with right clicksketch commands stays active until you select another command Place the dimension and then enter the dimension value and press enter key.If a sketch error occurs, Autodesk Inventor highlights will detect it using the sketch doctor.13SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of TechnologyCommon Closed Profile ErrorsProfile not closed–Use Coincident constraint–Use Trim commandsMultiple overlapping elements–Use Trim– or Delete14SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of TechnologyThe Auto DimensionSelect the Auto Dimension from the Sketch panelDisplays the number of constraints or parametric dimensions needed to fully constrain the closed profile(s). Uncheck dimensions and then hit “Apply”. You will notice at the bottom right corner the dimensions needed will go from 10 to 8. Get this number to be Zero (0) by adding General Dimensions.15SheetCourse: Introduction to Engineering Graphics and Visualizationcopyright 2011, Georgia Institute of TechnologyA Fully Constrained Profile using Geometric Constraints and Parametric DimensionsNote: All