1. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 1 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Bruce Mayer, PE Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege.edu Engineering 22 AutoCAD © 2D Construction-2

2. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 2 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Learning Goals  Become Proficient with invocation of AutoCAD Drawing Commands  Create Basic AutoCAD 2-Dimensional Drawing Elements e.g.; Lines, Circles, Ellipses and PolyGons  Use a Combination of ACAD 2D Element to construct more Complex 2D Shapes

3. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 3 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Last Time  Line  Construction Line  Circle  Circle Center Lines  PolyLines  Spline  Ellipse  Erase

4. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 4 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics RECTANGLE Command  The RECTANGLE command draws a rectangle whose sides are vertical and horizontal. The position and size of the rectangle are defined by picking two diagonal corners  A very Easy to use Command  To Invoke the Rectangle Command PullDown Menu: Draw → Rectangle The Tool on the Drawing ToolBar Command Line: RECTANGLE or REC or RECTANG

5. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 5 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics POLYGON Command  The Polygon command can be used to draw any REGULAR polygon from 3 sides up to 1024 sides  POLYGON Requires 4 User Inputs 1.number of sides 2.a pick-point for the polygon center 3.whether the polygon is inscribed or circumscribed 4.a pick point which determines both the radius of this imaginary I/C circle and the orientation of the polygon

6. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 6 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics POLYGON Command  To Invoke the Polygon Command PullDown Menu: Draw → Polygon The Tool on the Drawing ToolBar Command Line: POLYGON or POL Inscribed Heptagon – 2” R Circumscribed Heptagon – 2” R

7. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 7 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics POINT Command  The POINT command inserts a point marker in the drawing at a position which you pick in the drawing window or at any co-ordinate location which you enter at the keyboard.  The default point style is a simple dot  This is often difficult to see  The point style Can Be Changed to something more easily visible or elaborate using the point style dialog box.

8. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 8 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics POINT Command  To Invoke the Point Command PullDown Menu: Draw → Point The Tool on the Drawing ToolBar Command Line: POINT  To Change the Point Shape Activate Point Style Dialog box PullDown Menu: Format → Point Sytle... Command Line: DDPTYPE

9. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 9 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics POINT Style  The Point Style Dialog box Default Point Style Fine-Tuned Point Style

10. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 10 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics TEXT Command  The TEXT command inserts a SINGLE LINE of Text into the dwg  To Invoke the TEXT command PullDown Menu: Draw → Text → Single Line Text Command Line: TEXT  Text  Inserts Text at Mouse Pick-Point  Always Expects another Line Command: text Current text style: "Standard" Text height: 0.0000 Specify start point of text or [Justify/Style]: Specify height <0.2000>:.3 Specify rotation angle of text <0>: Command: Command: Command: *Cancel*

11. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 11 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics MTEXT Command  The MTEXT command inserts a BOX in Which Multiple Lines of Text are Placed  To Invoke the MTEXT command PullDown Menu: Draw → Text → Mulitline Text Command Line: MTEXT  The Tool on the Drawing ToolBar  Inserts a “Rectangle-Like” Text Box, along with the Text Formatting DiaLog Box

12. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 12 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics MTEXT Example Form MultiLine Box by Dragging Corners Text formatting Box Invoked Automatically by MTEXT command

13. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 13 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Text Options  MText Turns on the Text Formatting Dialog Box  DText (Dynamic text) Invokes Command Line Options: Command: dtext Current text style: "Standard" Text height: 0.3000 Specify start point of text or [Justify/Style]: j Enter an option [Align/Fit/Center/Middle/Right/TL/TC/TR/ML/MC/MR/BL/BC/BR]:  Justification Examples

14. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 14 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Editing/Tuning Commands  Move  Copy  OffSet  Mirror VERY Useful

15. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 15 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Editing/Tuning Commands cont  Array  Rotate  Trim  Extend

16. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 16 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Editing/Tuning Commands cont  Break  Chamfer  Fillet  Table

17. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 17 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics All Done for Today Its Fill-Lĕt, NOT Fill-Lāy

18. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 18 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Bruce Mayer, PE Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege.edu Engr/Math/Physics 25 Appendix 

19. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 19 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Break Command  Command: break Select object: quad of Specify second break point or [First point]: nea to Breaks CCW

20. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 20 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Demo  Open AcadIso.dwg  Set Limits: 297, 210  Grid/Snap: 5/1  Make Obj layer Magenta & Cont.  Draw Obrnd Slot 4 dia, 10 ctr-to-ctr  Array slot 3x5  Rotate Middle Slot by -37 deg Use Line-mid

21. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 21 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Demo - 2  Draw Rectangle Above, & Polygon below the slanted Slot  Extend the slot sides to the rect & ellipse  Break Ell with Break Command Use First Point Option  Stretch Col-5 Slots to Right Try withOUT & With CROSSING option  For the Previously Drawn Rectangle for 2 corners each Chamfer – 2.7 Fillet – 4.3 – ReFillet to 0

22. BMayer@ChabotCollege.edu ENGR-22_Lec-04_2D_Construction-2.ppt 22 Bruce Mayer, PE Engineering 22 – Engineering Design Graphics Demo - 3  Make Table 3 x 2 Col width = 13 Txt ht = 3