Cadd Manual

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    SYLLABUS

    ME2155 - COMPUTER AIDED DRAFTING AND MODELING LABORATORY

    As Per Anna University Chennai Syllabus

    (For All Non-Circuit Branches)

    L T P C

    0 1 2 2

    List of Exe!ises "si#$ soft%&e !&'&()e of D&fti#$ * Mo*e)i#$

    1. Study of caabilities of soft!are for "raftin# and $odelin# % Coordinate

    syste&s (absolute' relative' olar' etc.) % Creation of si&le fi#ures lie oly#on

    and #eneral &ulti-line fi#ures.

    . "ra!in# of a *itle Bloc !ith necessary te+t and ro,ection sy&bol.

    . "ra!in# of curves lie arabola' siral' involute usin# B-sline or cubic sline.

    . "ra!in# of front vie! and to vie! of si&le solids lie ris&' yra&id'

    cylinder' cone' etc' and di&ensionin#.

    /. "ra!in# front vie!' to vie! and side vie! of ob,ects fro& the #iven ictorial

    vie!s (e#. 0-bloc' Base of a &i+ie' Si&le stool' b,ects !ith hole and

    curves).

    2. "ra!in# of a lan of residential buildin# ( *!o bed roo&s' itchen' hall' etc.').

    3. "ra!in# of a si&le steel truss.

    4. "ra!in# sectional vie!s of ris&' yra&id' cylinder' cone' etc'

    5. "ra!in# iso&etric ro,ection of si&le ob,ects.

    16. Creation of -" &odels of si&le ob,ects and obtainin# -" &ulti-vie!

    dra!in#s fro&

    -" &odel.

    Note+ P)otti#$ of *&%i#$s ,"st (e ,&*e fo e&! exe!ise * &tt&!e* to te

    e!o*s %itte# (. st"*e#ts/

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    CONTENTS

    Ex/

    No/N&,e of te Exe!ises P&$e

    1

    a) Creation of Si&le fi#ures lie Poly#on usin# AbsoluteCo-ordinate syste&

    b) Creation of 7eneral $ulti fi#ures usin# 8elative Co-ordinate syste&

    c) Creation of 7eneral $ulti fi#ures usin# Polar Co-ordinate syste&

    "ra!in# of a *itle Bloc !ith necessary te+t and ro,ection sy&bol

    a) "ra!in# of Curves lie Siral usin# Bsline

    b) "ra!in# of Curves lie Parabola usin# Sline

    a) "ra!in# of front vie! and to vie! of si&le solids lie ris& and

    di&ensionin#

    b) "ra!in# of front vie! and to vie! of si&le solids lie yra&id and

    di&ensionin#c) "ra!in# of front vie! and to vie! of si&le solids lie cylinder and

    di&ensionin#

    d) "ra!in# of front vie! and to vie! of si&le solids lie cone and

    di&ensionin#

    /

    a) "ra!in# front vie!' to vie! and side vie! of 0-bloc fro& ictorial

    vie!

    b) "ra!in# front vie!' to vie! and side vie! of 9Base of $i+ie fro&

    ictorial vie!

    c) "ra!in# front vie!' to vie! and side vie! of 9si&le stool: fro&

    ictorial vie!

    d) "ra!in# front vie!' to vie! and side vie! of ob,ect fro& ictorialvie!

    2 "ra!in# of a lan of residential buildin#

    3 "ra!in# of a si&le steel truss

    4

    a) "ra!in# sectional vie! of ris&

    b) "ra!in# sectional vie! of Cylinder

    c) "ra!in# sectional vie! of Cone

    d) "ra!in# sectional vie! of Pyra&id

    5 "ra!in# iso&etric ro,ections of si&le ob,ects

    16Creation of " &odels of si&le ob,ects and obtainin# " $ulti 0ie!

    dra!in#s fro& " &odel

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    COMPUTER AIDED DESIGN CAD

    *he bi##est use of co&uter #rahics has been as an aid to desi#n since t!o

    decades. *his is #enerally referred to as CA" and it is a o!erful tool to desi#n and

    draft the arts or fi#ures interactively.

    ;hen an ob,ect:s di&ensions have been secified to the co&uter syste&' thedesi#ners can vie! any side of the ob,ect' to see ho! it !ill loo after construction.

    Civil' $echanical' ndividual sections of vehicle co&onents can be desi#ned searately and fitted

    to#ether to dislay the total ob,ect.

    Buildin# desi#ns are also created !ith co&uter #rahics by the Architects forthe desi#n of floor lans' arran#e&ent of doors' !indo!s and three di&ensional

    buildin# &odels er&it Architects to study the aearance of sin#le buildin# or a #rou

    of buildin#s.

    GENERAL PURPOSE GRAP3ICS SOFT4ARE

    $any inds of co&uter inut and outut are no!adays ro#ra&&ed in

    standard !ays usin# #rahics soft!are or ro#ra&&in# lan#ua#es.

    So&e of the #rahics soft!ares are available for dislayin# and &aniulatin#

    #rahics outut. Basic functions available in these aca#es are desi#ned for the

    #rahics Pro#ra&&e that includes those for #eneratin# icture co&onents (such as

    strai#ht li#ht' oly#ons' circles' ortho#rahic and iso&etric and other fi#ures etc.)

    settin# colors and intensity values' selectin# vie!s and alyin# transfor&ation etc.

    By contrast' alication aca#es for #rahics are desi#ned for non-

    ro#ra&&es and are set u so that users can roduce #rahics !ithout !orryin# about

    ho! they do it.

    *he interface to the #rahics routines in such aca#es allo!s users to

    co&&unicate !ith the ro#ra&s in their o!n ter&.

    So&e of the 7rahics aca#es areA"toCAD Po-E U#i$&'i!s I-DEAS

    CATIA NASTRAN et!/

    AUTOCAD INTRODUCTION

    CA" is the acrony& for Co&uter-Aided "esi#n. A CA" syste& is a

    co&bination of hard!are and soft!are that enables en#ineers and architects to desi#n

    everythin# fro& furniture to airlanes.

    A CA" syste& allo!s an en#ineer to vie! a desi#n fro& any an#le !ith the

    ush of a button and to ?oo& in or out for close-us and lon#-distance vie!.

    AutoCA" is an interactive dra!in# syste& desi#ned to er&it a user to

    construct or edit a dra!in# on a #rahics dislay screen.

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    St&ti#$ A"toCAD

    @ou can start AutoCA" by choosin# it in the St&t&enu or by double clicin#

    the A"toCAD 2000 icon on the ;indo!s desto.

    *o start AutoCA" fro& the St&t ,e#"

    Choose Start Pro#ra&s AutoCA" 666 $enu AutoCA" 666

    ;hen you start AutoCA"' the ro#ra& dislays a St&t U' dialo# bo+ as sho!n

    belo!.

    A"toCAD I#tef&!es

    *he AutoCA" screen has the follo!in# si+ arts.

    1. *itle Bar

    . $enu bar

    . *ool bars

    . "ocu&ent ;indo! or "ra!in# area

    /. Co&&and ;indo!

    2. Status bar

    Tit)e (&+ *his is at the to of the !indo! sho!s the na&e of the ro#ra& and thena&e of the current dra!in#.

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    Me#" (&+ ocated directly belo! the title bar' rovides ull-do!n &enus fro& !hich

    you can choose co&&ands.

    St&t"s (&+ *his is in the botto& of the screen sho!s the coordinates of the screen

    cursor as !ell as the current settin#s of various AutoCA" ro#ra& &odes.

    Co,,* 4i#*o%+ *he Co&&and ;indo! located at the botto& of the Screen. @ou

    can start any AutoCA" co&&and by tyin# the co&&and and then Press

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    COMMAND 4INDO4

    >n Co&&and ;indo! you can tye AutoCA" co&&ands and vie! ro&ts

    and ro#ra& &essa#es. *he Co&&and ;indo! initially dislays the three &ost recent

    lines of ro&ts' but you can chan#e the nu&ber of lines dislayed. Scroll bars on the

    ri#ht side of this !indo! let you scroll bac to see revious ro&ts.

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    MAIN MENU OPERATIONS

    Several tyes of &enu !ill be seen in AutoCA".

    Do'-*o%# &enus aear !hen a na&e is clicked in the &enu bar.

    S"(-,e#"s aear !hen a na&e in a dro-do!n &enu follo!ed by an out!ardointin# arro! is selected !ith a click.

    Ri$t-!)i!7 &enus aear !ith a right-click in so&e situations.

    enin# the O'tio#s dialo# fro& the ri#ht-clic &enu in the co&&and !indo!.

    *he O'tio#s dialo# !ith the Dis')&. sub-dialo# and the Co)o O'tio#s

    A ri#ht %clic &enu sho!s the &enu aearin# !ith a ri#ht-clic in the co&&and

    !indo!. A&on# other ri#ht-clic &enus areD

    Too)(&s+ 8i#ht-clic in any toolbar on screen brin#s a &enu sho!in# all the availabletoolbars.

    TERMS IN AUTOCAD

    C"so+ Several tyes of cursors !ill be seen !hen usin# AutoCA" such as those

    sho!n in the fi#ure belo! $ove the &ouse and the cursor in action &oves as the

    &ouse is &oved.

    Do!7e*+A feature in a osition ri#ht u a#ainst the ed#e of the screen or a#ainstanother toolbar.

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    Def&")t+ *he na&e #iven to the settin#s or ara&eters of an alication as set !hen the

    soft!are is first urchased.

    Di&)o$+ A !indo! in !hich settin#s &ay be &ade.

    Do'-*o%# ,e#"+ A &enu !hich aears !ith a clic on a na&e in the &enu bar ofAutoCA"E

    E#te+ *ye the #iven !ord or letters at the eyboard.

    E#tit.+ as the sa&e &eanin# in AutoCA" as has the !ord ob,ect.

    Es!+ *he Es! ey of the eyboard. >n AutoCA" 66 ressin# the

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    St&t"s (&+>ncludes a nu&ber of buttons SNAP'78>"' etc. Coordinate fi#ures in +'y'?

    nu&bers aear at the left-hand end of the bar. ;hen a tool is called' its action is

    dislayed in a sentence dislacin# the coordinate nu&bers.

    Mo*e) * L&.o"t t&(s+A clic on one of these tabs taes the !indo! into $odel

    Sace (the $odel tab) or Paer Sace (a ayout tab). ;hen AutoCA" is oened' its!indo! !ill aear in $odel Sace for&at.

    UCS i!o#D Sho!s the d