AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 11001
Lecture 2 Content
Drawing environment
– Drawing equipment
– Drawing setup
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 11002
Drawing equipment– Full description of all equipment is tedious and
unnecessary– Aim is to cover the essentials– Discuss:
Drawing boardsT-squaresSet squaresScalesProtractorsCurvesDividersCompasses
Drawing pensDrawing inkLettering pensStencilsErasersColorsDrawing paper
Plastic coated cardTracing paperTracing filmDetail paperBacking sheetsFixing
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 11003
Drawing boards:– Made in sizes to correspond with standard paper
sizesA1 -- 920mm x 650mm
A2 – 1270mm x 920mm
– Flat, smooth, do not twist or buckle– Soft enough to attach pins, staples, etc.
T-squares– Sizes correspond to lengths of drawing boards– Provides right angle straight lines that are
perpendicular to the drawing board’s edge
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 11004
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 11005
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 11006
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 11007
Set squares
– Used for drawing vertical and inclined lines
– It is a triangle with an adjustable side
– Protect from damages
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 11008
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 11009
Scales– Thin narrow strips of white or yellow
plastic with dimensions along each edge
– At various recognized proportions eg. 1:1, 1:10, 1:100, 1:250, 1:2500, etc.
– Scales normally 30cm or 15 cm long
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110010
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110011
Protractor– Used for measuring or for setting out
angles– Divided into degrees– Center and diameter is shown
Curves– Called French curves or flexible ruler– Used to draw irregular or complex curves– Not recommended to draw regular shapes
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110012
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110013
Dividers– Used for dividing lines into equal units and
for multiplying or transferring distances
Compasses– Used for drawing circles and arcs– Consists of a needle point leg, and the
other leg for a pencil attachment
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110014
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110015
Drawing pens– Also called technical pens– Based on the fountain-pen principle, with ink
reservoirs– Nibs can be interchanged, ranging from 0.2mm to
1.2mm
Drawing ink– Waterproof (especially for drawings that are used
outdoors)– Pre-filled cartridges or filled straight from the
bottle
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110016
Pens and stencils
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110017
Pencils– Ordinary drawing pencils are made of cedar wood
with ‘leads’ of compressed clay and graphic
– ‘leads’ are made in varying degrees of hardness and softness ranging from the hardest, 9H, to the softest, 6B
– Most drawing are done in HB or F– Pencils require frequent sharpening– More popular are the clutch pencils
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110018
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110019
Erasers– Used for alterations, corrections– Special ink eraser removes inks from
tracing paper and drafting film
Colors– Used extensively for drawings to represent
features– Used the primary colors (RED, YELLOW,
BLUE)
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110020
Drawing paper– Machine made papers (eg. Cartridge)
which are used for exercises and line drawing
– Handmade or mould made papers which are used for rendering drawings
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110021
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110022
Tracing paper and film– Specially treated paper and polyester film of
transparent or semi-transparent
Detail paper– Supplied in rolls and pads of 100 sheets– Up to A2 size
Backing sheets– Wooden drawing boards are covered with backing
sheets to provide a firm and even working surface
Fixings– Holding the paper to the board using drafting tape
or scotch tape
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110023
Drawing setup in AutoCAD
Drawing units– Default in a new drawing is linear and
angular units which are set to decimal numbers
– Could use existing templates or start from scratch
– Set the length and angle types, and their respective precision
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110024
Drawing size– Defined as the part of the screen in which you
draw– Involves setting:
1. GridPattern of regularly spaced dots used as an aid to drawing
2. LimitsSetting the coordinates of the lower-left (ll) and upper-right (ur) corners of the gridDefault (ll) is (0,0) while (ur) is set accordingly
Grid and Snap– Ensures lines are connected (snapped) onto
points as shown on the grid
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110025
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110026
AutoCAD …. Lecture 2 AutoCAD …. Lecture 2 Dr. Steve Ramroop Dr. Steve Ramroop04/21/23
GEM 110027
… The End …
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