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Computer-aided design's role

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					ENGR 2160 - Engineering Graphics

   More Advanced Commands

           Chapter 3
OSNAP

   Remember the SNAP command allows users to snap
    to points.

   However the Object SNAP command allows users to
    snap to entities on the drawing.
       Endpoint of a Line
       Midpoint of a Line
       Intersection of two Lines
       Center Point of a Circle
       Etc.
Exercises
   PRACTICE (From Page 78)
     SP 3-1
     SP 3-2

   CLASSWORK (From Page 110)
     EX 3-1
     EX 3-2

     EX 3-3
GRIPS
   The GRIPS function is used to quickly identify and lock
    onto convenient points on entities.
      For Example: End points of a line, Center point of a
       circle.
   GRIPS are helpful when using some modify
    commands:
      Turning GRIPS on and off (use Command Line)
       For the following select the object and right click on
       the convenient points.
      Extend
      Move
      Rotate
      Mirror
BLOCKS
   BLOCKS are group of entities saved as a single unit.
   Blocks are used to same shapes and groups of
    shapes that are used frequently when creating
    drawings.
      The idea is to save time by inserting pre-drawn
       objects in the SAME DRAWING.
      Insertion allows positioning, scaling and rotation
   BLOCK Operations
      Create Block (Use Block Toolbar)
      Insert Block (Use Block Toolbar)
      Change Scale of Block (Use Block Toolbar)
      Explode a Block (Use Explode from Modify Toolbar)
WBLOCK
   WBLOCKS are group of entities saved as a single unit
    that can be used in ANY DRAWING.
      The idea is to save time by inserting pre-drawn
       objects in multiple drawings.
   WBLOCK Operations
       Create Block (Type WBLOCK in Command Line)
       Insert Block (Use Block Toolbar)
       Change Scale of Block (Use Block Toolbar)
       Explode a Block (Use Explode from Modify Toolbar)
Basic Information Included in a Drawing

   Projected  Views: Show as many sides as needed for
    completeness.
   Cross Sections: A view that is good for showing
    interior features.
   Table: Usually placed on the lower right corner,
    consists of material information, part name,
    designer etc.
   Dimensions: These are the most important and
    most complicated part of the drawing. There is
    more to it than just the numerical values!

       Source: http://engineering.dartmouth.edu/mshop/pdf/introdr.pdf
Basic Information Included in a Drawing




      Source: http://engineering.dartmouth.edu/mshop/pdf/introdr.pdf
TITLE BLOCKS


             SUSHIL ACHARYA
          SOFTWARE ENGINEERING
         ROBERT MORRIS UNIVERSITY
         TITLE:

         EXERCISE NO.:
         SCALE:     DATE:   REV:
ATTRIBUTES
   ATTRIBUTES are sections of text added to a block that
    prompt the drawer to add information to the drawing.
      For Example a title block may have an attribute that
       prompts the illustrator to add the date to the title
       block as it is inserted into the drawing.
   ATTRIBUTE Operations
       Add an Attribute to a Block (Use Block Toolbar)
       Create a New block that includes Attributes (Use Block
        Toolbar)
       Insert an existing block with attributes (Use Block Toolbar)
       Edit and Existing Attribute (Use Block Toolbar)
Exercises
   CLASSWORK (From Page 110)
     EX 3-1, EX 3-2, EX 3-3
     EX 3-30 (Attach Title Block to your drawing)

     EX 3-35 (Attach Title Block to your drawing)

     EX 3-36 (Attach Title Block to your drawing)

   HOMEWORK (Page 117)
       EX 3-34 (Attach Title Block to your drawing)

REMEMBER ONLY Submit the Homework by lab class next week.
End of Chapter - 3

				
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