introduction to lettering, dimensioning and points

7/23/2019 Introduction to Lettering, Dimensioning and Points

1/27

INTRODUCTION TO

LETTERING, DIMENSIONING, PROJECTION OF POINTS


2/27

DRAWING PAPER

Drawing paper sho!" #e $hi%&, s'oo$h, s$rong an" ni(or' in $hi%&n

Fi#res o( $he "rawing sho!" #e worn o$ whi!e sing a goo" eraser)

*IS has re%o''en"e" $he se o( s$an"ar" si+e "rawing papers -


3/27

LETTERING AND DIMENSIONING

PRACTICES

These are re%o''en"e" #. *IS / SP012334

The %orre%$ shape an" si+e o( $he o#5e%$ %an #e 6isa!i+e" (ro' $he n

o( no$ on!. i$s 6iews, #$ a!so (ro' 6arios $.pes o( !ines, "i'ensions

For genera! %!assroo' wor&, we se A2 si+e "rawing)


4/27

TITLE *LOC7

Ti$!e #!o%& sho!" #e on #o$$o' righ$ han" %orner o( $he "rawing shee

The $i$!e #!o%& %an ha6e 'a8i'' o( 9:3'' !eng$h an" 1;'' heigh

A $.pi%a! $i$!e #!o%& (or %!assroo' wor& is shown (or re(eren%e)


5/27

DRAWING SIS 93:992339?


6/27

FOLDING OF DRAWING SIS 991109

IS spe%i(ie" $wo 'e$ho"s (or (o!"ing "rawing shee$s / One si$a#!e (o

o$her 'e$ho" (or &eeping (i!es in %a#ine$s

I$ is i'por$an$ $o no$e $ha$, in #o$h $.pes o( (o!"ing, $he Ti$!e #!o%& sh

#e 6isi#!e)


7/27


8/27

LINES >IS 93:90 >Par$ 23? 2339 SP 012334?


9/27

LETTERING >IS @13@ >PART 3? SP 012334 Main (ea$res o( !e$$ering / !egi#i!i$., ni(or'i$. an" rapi"i$. o( e8e%

Genera!!., !e$$ering sho!" #e "one freehand .

SINGLE STRO7E LETTERS / I$ 'eans, $ha$ $he $hi%&ness o( $he !e$

#e as ni(or' as i( o#$aine" (ro' one s$ro&e o( $he pen%i!)

T.pes o( s$ro&e !e$$ers -

T.pe A >i? Ber$i%a! an" S!ope" >:;o$o hori+on$a! ? an"

T.pe * >i? Ber$i%a! an" S!ope" >:;o

$o hori+on$a! ? Genera!!., 6er$i%a! !e$$ers are pre(erre" (or eas. an" (as$ e8e%$ion)


10/27

LETTERING

Le$$ers in "rawing 's$ #e in %api$a!s >Upper %ase !e$$ers?

Lower %ase !e$$ers are se" (or a##re6ia$ions !i&e '', %' e$%)

Si+e o( !e$$ers- S$an"ar" heigh$ (or CAPITAL !e$$ers an" n'era!s

re%o''en"e" #. *IS are gi6en #e!ow -

9), 2);, 4);, ;, 1, 93, 90 an" 23''

Gi"e!ines - In or"er $o o#$ain %orre%$ an" ni(or' heigh$, o( !e$$ers a

n'era!s, gi"e!ines are "rawn >sing 2< pen%i!? wi$h !igh$ pressre)


11/27


12/27


13/27


14/27


15/27


16/27

CLASSWOR7 TO DO

9) Wri$e (reehan" $he (o!!owing, sing sing!e s$ro&e 6er$i%a! >CAPITAL

!ower%ase? !e$$ers

a? A!pha#e$s >Upper %ase an" !ower %ase? an" N'era!s 3 $o @ >h 9

#? ENGINEERING GRAP h 4);''?


17/27

PROJECTION OF POINTSENGINEERING DRAWING


18/27

INTRODUCTION -

An o#5e%$ is represen$e" #. "rawing $he #on"aries o( a!! $he sr(a%es o( $he o#5e%$)

The #on"ar. o( a sr(a%e 'a. #e 'a"e p o( s$raigh$ !ines or %r6e" !ines or #o$h) As

ea%h %r6e or s$raigh$ !ine is !ogi%a!!. 'a"e p o( n'#er o( poin$s, $he $heor. o(

or$hographi% pro5e%$ions s$ar$s wi$h projection of points.


19/27

When planes of projection are extended beyond their line of intersection, they for

QUADRANT


20/27

ORT!O"RA#!$% #RO&'%T$ON ( TO# )$'W AND *OTTO+

)$'W

Reference ine -./0


21/27

FIRST ANGLE PROJECTION -

When $he o#5e%$ is si$a$e" in Firs$ a"ran$, i)e) in (ron$ o( B)P)

an" a#o6e


22/27

Thir" Ang!e Pro5e%$ion - The o#5e%$ is si$a$e" in 4r"a"ran$) The (

%o'es #e!ow = p!ane, an" $op 6iew a#o6e = p!ane)

*IS re%o''en"s $he se o( (irs$ ang!e pro5e%$ions in !ine wi$h ISO spe

a!! aron" $he wor!")

Posi$ions o( poin$s in spa%e-


23/27

NOTATIONS TO *E FOLLOWED -

9) A%$a! poin$s in spa%e are $o #e "eno$e" #.%api$a! !e$$ers i)e) A,*,C )

2) Their (ron$ 6iews are "eno$e" #.

%orrespon"ing !ower %ase !e$$ers wi$h "ash

a,#,% an" $heir $op 6iews #. a,#,%4) Pro5e%$ors are "rawn as %on$inos $hin !in


24/27

EAMPLE FOR FIRST ANGLE PROJECTION -


25/27

EAMPLE FOR T


26/27

C!asswor&$o "o -

9) For poin$s in a p!ane are in s%h a wa. $ha$,

Poin$ A is 23 a#o6e Pro(i!e P!ane

(ron$, $op an" si"e 6iews o( $he poin$)

4) A poin$ A is 9; a#o6e


27/27

C!asswor& $o "o -

0) A poin$ a$ 2; a#o6e $he re(eren%e p!ane 8. is in $he (ron$ 6iew o( $wo poin$s A

The $op 6iew o( A is 03 #ehin" B)P an" $he $op 6iew o( * is ;3 in (ron$ o( B)P)

Draw $he pro5e%$ions o( $he poin$s an" s$a$e $heir posi$ions re!a$i6e $o $he p!anes o

pro5e%$ion an" $he Ka"ran$s in whi%h $he. !ie)

;) A poin$ A is 23 a#o6e

introduction to lettering, dimensioning and points

Documents