1 / 37

Bruce Mayer, PE Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege

Engineering 22. AutoCAD 3D Fundamentals. Bruce Mayer, PE Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege.edu. Learning Goals. Draw Right Hand Coord System Distinguish between ACAD World CoOrd System (WCS) and User CoOrd Systems (UCS) In ACAD Create and Save and UCS’s

ewa
Download Presentation

Bruce Mayer, PE Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Engineering 22 AutoCAD 3DFundamentals Bruce Mayer, PE Licensed Electrical & Mechanical EngineerBMayer@ChabotCollege.edu

  2. Learning Goals • Draw Right Hand Coord System • Distinguish between ACAD World CoOrd System (WCS) and User CoOrd Systems (UCS) • In ACAD Create and Save and UCS’s • Use UCS, elev, and thickness to draw “Extruded” Shapes • Use ACAD ViewPorts to Show Orthographic Views from a 3D View

  3. AutoCAD CoOrdinate Systems • AutoCAD system maintains a 3D database • World Coordinate System • X,Y as top (plan) view (civil engineering) • Z axis vertical • User Coordinate System (UCS) may be aligned with features (name and save) • Icon shows current coordinate system

  4. RIGHT Hand CoOrd Systems • The CoOrd TriAd is Defined by Your RIGHT Hand → Rt-Hand Rule

  5. Right-Hand Rule • Thumb points in the positive x direction • Index finger points in the positive y direction • Middle finger points in the positive z direction • Used to define positive rotation • Point thumb in the positive direction along the axis which is perpendicular to the plane of rotation • The fingers point in the direction of positive rotation

  6. World Coordinate System • The Default 3D Coord • Base System is the World Coordinate System, or WCS • The Orientation of the WCS relative to the Default Screen • We Can find the WCS Icon in the Lower Left

  7. WCS • Note that the “Z” Axis for the WCS comes OUT of the Screen • Looking “Straight Down” on the Z-axis gives us the familiar “Plan View” 2D Orthographic Drawing System World Co-ordinate System Set to Origin - Origin is OFF screen World Co-ordinate System Set to Origin - Icon displayed AT origin

  8. View Point • Can Change the “Point of View”, or Viewpoint, for the Object in 3 Ways • WCS View Point

  9. Changing ViewPoints By PullDown Menu

  10. The “SW” IsoMetric

  11. View Command • view brings up ViewPoint Dialog Box

  12. Can Also Change ViewPoint with The “View” ToolBar The ViewPoint ToolBar • To RETURN to PLAN View in the WCS Use the PullDown Menu

  13. Local (User) Coord Systems • The WCS can be MODIFIED to fit the needs of the USER For Drawing in Orientations OTHER than the Plan View • Modify the WCS to a UCS: • Define new origin (with existing axes) • Rotate existing Coordinate System about X, Y, or Z Axis • Define new origin and axes (3-Point option) • NAME and SAVE the UCS

  14. WCS → (1,4,-3)UCS → (3, 3.5, 0) UCS WCS User (Local) CoOrd Systems + (1,4,-0) (4,1,-3) + (4,1,0)

  15. Making a UCS by Command Ln • Specify an Origin UCS /New • /orthoGraphic (specify the origin relative to the current coordinate system) • Reorient the axes UCS /New • /Zaxis (choose the direction of the Z axis) • /3point (choose the origin and the positive X and Y direction) • /Z (specify the angle of rotation about the Z axis) • Save and Restore the UCS • UCS /Save and UCS /Restore

  16. Make a UCS Called “slant” using the CoOrd from 2-Slides Back Know origin and pts in WCS space Start w/ WCS Use UCS → NEW → 3Point Commands Example → Make a UCS • Invoke UCS/3p to Set Origin to (4,1,0) • Set Points to Define X & Y Axes

  17. View from WCS Plan View Result → Make a UCS • Invoke UCS/3p to Set Origin to (4,1,0) x-Axis INTO Paper

  18. Give the New UCS a NAME with the Save command Save and Use New UCS • Change to Plan View for UCS Command: ucs Current ucs name: *NO NAME* Enter an option [New/Move/orthoGraphic/Prev/Restore/Save/Del/Apply/?/World] <World>: s Enter name to save current UCS or [?]: slant

  19. Plumbing Fitting Shows Up as Edge View → Not too interesting Plan View in “slant” UCS • Lets Make “twist” UCS by ROTATING the WCS

  20. Command History for twist Command: ucs Current ucs name: *WORLD* Enter an option [New/Move/orthoGraphic/Prev/Restore/Save/Del/Apply/?/World] <World>: n Specify origin of new UCS or [ZAxis/3point/OBject/Face/View/X/Y/Z] <0,0,0>: x Specify rotation angle about X axis <90>: 41 Command: UCS Current ucs name: *NO NAME* Enter an option [New/Move/orthoGraphic/Prev/Restore/Save/Del/Apply/?/World] <World>: n Specify origin of new UCS or [ZAxis/3point/OBject/Face/View/X/Y/Z] <0,0,0>: y Specify rotation angle about Y axis <90>: 67 Command: ucs Current ucs name: *NO NAME* Enter an option [New/Move/orthoGraphic/Prev/Restore/Save/Del/Apply/?/World] <World>: n Specify origin of new UCS or [ZAxis/3point/OBject/Face/View/X/Y/Z] <0,0,0>: z Specify rotation angle about Z axis <90>: 13 Command: ucs Current ucs name: *NO NAME* Enter an option [New/Move/orthoGraphic/Prev/Restore/Save/Del/Apply/?/World] <World>: s Enter name to save current UCS or [?]: twist

  21. Put Dwg-Space into Plan View for twist Draw Heptagon in twist UCS • Draw a Heptagon in twist-space

  22. Can ONLY Draw in the CURRENT UCS WCS Current → PLAN View Drawing in UCS • To Change UCS Use the Dialog Box Invoked by PullDown • Tools → Named UCS

  23. 300 high Elev and Thickness • The Elev Command Can Be used to “Extrude” Basic Shapes • Demonstrate by Constructing the Object at Left Time For Live Demo

  24. Start new Dwg using acadiso.dwt Locate and draw the 50x50 “bases” for the “towers” EX14-14 → 1 • Change to SE Isometric view • Construct the Tower Using • Elev • Thickness • line

  25. EX14-14 → 3 Command: _-view Enter an option [?/Categorize/lAyer state/Orthographic/Delete/Restore/Save/Ucs/Window]: _seiso Regenerating model. Command: elev Specify new default elevation <0.0000>: Specify new default thickness <0.0000>: 300 Command: l LINE Specify first point: Specify next point or [Undo]: Specify next point or [Undo]: Specify next point or [Close/Undo]: Specify next point or [Close/Undo]: c Command: LINE Specify first point: Specify next point or [Undo]: Specify next point or [Undo]: Specify next point or [Close/Undo]: Specify next point or [Close/Undo]: c Command: z ZOOM Specify corner of window, enter a scale factor (nX or nXP), or [All/Center/Dynamic/Extents/Previous/Scale/Window/Object] <real time>: e Regenerating model.

  26. Move UCS to Top Corner by Picking Point w/ Mouse EX14-14 → 4 • Draw CrossBar using • Osnap • Elev • Thickness Enter an option [New/Move/orthoGraphic/Prev/Restore/Save/Del/Apply/?/World] <World>: n Specify origin of new UCS or [ZAxis/3point/OBject/Face/View/X/Y/Z] <0,0,0>:

  27. EX14-14 → 5 • Commands to Construct CrossBar Command: z ZOOM Specify corner of window, enter a scale factor (nX or nXP), or [All/Center/Dynamic/Extents/Previous/Scale/Window/Object] <real time>: w Specify first corner: Specify opposite corner: Command: elev Specify new default elevation <0.0000>: Specify new default thickness <300.0000>: 50 Command: l LINE Specify first point: Specify next point or [Undo]: Specify next point or [Undo]: Specify next point or [Close/Undo]: Specify next point or [Close/Undo]:c

  28. Move and Rotate UCS so that the XY plane Resides on the inside of the 1st tower Z-axis extend toward 2nd Tower EX14-14 → 6 • The Command History (pts Picked) Command: ucs Current ucs name: *NO NAME* Enter an option [New/Move/orthoGraphic/Prev/Restore/Save/Del/Apply/?/World] <World>: n Specify origin of new UCS or [ZAxis/3point/OBject/Face/View/X/Y/Z] <0,0,0>: 3p Specify new origin point <0,0,0>: Specify point on positive portion of X-axis <1.0000,50.0000,0.0000>: Specify point on positive-Y portion of the UCS XY plane <0.0000,51.0000,0.0000>:

  29. Use xline and offset to Locate Cyl Ctr • Draw Connecting Cylinder using • elev → 0 • Thickness → 110 • Circle → Ø50 EX14-14 → 7

  30. EX14-14 → 8 • Expand Limits, zoom → 1 to fit

  31. EX14-14 → 9 • Commands to Construct OrthoViewPorts Command: limits Reset Model space limits: Specify lower left corner or [ON/OFF] <0.0000,0.0000>: Specify upper right corner <210.0000,330.0000>: 210,360 Command: z ZOOM Specify corner of window, enter a scale factor (nX or nXP), or [All/Center/Dynamic/Extents/Previous/Scale/Window/Object] <real time>: 1 Command: z ZOOM Specify corner of window, enter a scale factor (nX or nXP), or [All/Center/Dynamic/Extents/Previous/Scale/Window/Object] <real time>: 1 Command: -view Enter an option [?/Categorize/lAyer state/Orthographic/Delete/Restore/Save/Ucs/Window]: o Enter an option [Top/Bottom/Front/BAck/Left/Right]<Top>: r Regenerating model. Command: z ZOOM Specify corner of window, enter a scale factor (nX or nXP), or [All/Center/Dynamic/Extents/Previous/Scale/Window/Object] <real time>: 1

  32. All Done for Today • 3D Orbit Command The AMEandBonus Tol.

  33. Engr/Math/Physics 25 Appendix  Time For Live Demo Bruce Mayer, PE Licensed Electrical & Mechanical EngineerBMayer@ChabotCollege.edu

  34. Rotate Axis OnScreen

  35. EX14-5

  36. EX14-5 → zoom → 1

  37. EX14-5

More Related