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Fundamentals of Part Modeling                                                                                                                              Engineering Design with SOLIDWORKS® 2018













                                                There are two Orthographic projection drawing systems. The first Orthographic



                                                projection system is called Third Angle Projection. The second Orthographic projection




                                                system is called First Angle Projection. The two drawing systems are derived from




                                                positioning a 3D object in the Third or First quadrant as illustrated.













































                                                                                                                                                                                                                           0





































                                                                                   Front View                                                                                                            Front View
















                                                                                 Third Angle Projection                                                                                                                       First Angle Projection










                                                Third Angle




                                                Projection                                                                                                                    2                                                                                                     1






                                                Third angle projection                                                                            THIRD  ANGLE PROJECTION


                                                                                                                                                                 VIEWS
                                                is a method of



                                                creating a 2D drawing                                                           B                                                                                          TO P                                                                                                   B




                                                of a 3D object. The                                                                                                                                                                                                  ISOMETRIC




                                                3D object is                                                                                                                               -(±)-                                                                           -(±)-


                                                                                                                                                                                             '                                    FRO NT                                     •
                                                positioned in the third                                                                                                                                                                                             -(±)-


                                                                                                                                                                                                                                                                      •
                                                quadrant. The 2D




                                                projection planes are                                                                                    BOTTOM                        LEFT                                 -~                                    RIGHT

                                                                                                                                                                                                                              '  -,
                                                                                                                                                                                                                              I
                                                located between the                                                                                                                                                          -·
                                                                                                                                                                                                                              '  -,
                                                                                                                                                                                                                              I
                                                                                                                                                                                                                              I
                                                                                                                                                                                                                              '
                                                viewer and the part.                                                                                                                                                       BOTTOM



                                                The projected views


                                                                                                                                                                                                                    UNLESS OTHf;RWISE SPECIFIED:                               D&M ENGINEERING
                                                                                                                                                                                                                                                             UAMf     >AH
                                                are placed on a                                                                 A                                                                                   ,ouv,,11(. u:             Ol!AWII                        TITLE:                                              A
                                                                                                                                                                                                                    OIMWJl()llj  A•t  111  !IU;  NU
                                                                                                                                                                                                                                              (. " C¢Kt O
                                                                                                                                                                                                                    UA¢1,<)t1Al!
                                                                                                                                                                                                                    At10UlAI . MA¢11!   U MI>  !   tllGA,,t
                                                                                                                                                                                                                    IWO  HACE OE¢1MAt   :
                                                drawing.                                                                                                                                                            11iRU fl.AC E t>l¢"'Al  !   MIO ,...,,,,                    RIGHT ANGLE

                                                                                                                                                                                                                    l!MUUI  CfOMflh!          O ,A
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                                                                                                                                                                                                                       ------                                                                                -        -
                                                                                                                                                 , • <>~•~H>.                               AHUCA11011                                                  •                                                      SHEET  1 O f  1
                                                                                                                                                                              2                                                                                                     1











































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