Engineering drawing - mini paper, tools and guides

1. Mini Paper DRAW 110L (Engineering Drawing I)
By: John Paul Espino
De La Salle University – Dasmarinas
Facebook.com/Johnpaul.dss

3. Definitions of Technical Drawing
and its Standard
3
John Paul B. Espino IEE12
M 0700 – 1000
DRAW110L
• The practice or skill of
delineating objects in a precise
way using certain techniques of
draftsmanship, as employed in
architecture or engineering.
• Standards - ISO "A series"

4. Classifications of Drawings4
John Paul B. Espino IEE12
M 0700 – 1000
DRAW110L
• Artistic Drawing
• Technical Drawing

5. Drawing Media and Reproduction5
John Paul B. Espino IEE12
M 0700 – 1000
DRAW110L
• Diazo - a copying or coloring process using a diazo
compound decomposed by ultraviolet light.
• Blueprints - a design plan or other technical drawing.
• Microfilming - a length of film containing
microphotographs of a newspaper, catalog, or other
document.
• Xerography - a dry copying process in which black or
colored powder adheres to parts of a surface
remaining electrically charged after being exposed to
light from an image of the document to be copied.
• Photostatting - PHOTOSTAT. : a device for making a
photographic copy of graphic matter; also : a copy
made by this device.

6. Engineering Alphabet6
John Paul B. Espino IEE12
M 0700 – 1000
DRAW110L
• Guidelines and letter proportion – all letters
should be in the same height, proportion and
inclination.
• Common Errors

7. Sketching Techniques7
John Paul B. Espino IEE12
M 0700 – 1000
DRAW110L
• The best pencil for lettering on most surfaces are the H, F, and HB
grades.
• Hold your pencil in the position shown. It should make approximately
a 60o angle with the paper.
Pencil Techniques

8. Instrumental Drawing8
John Paul B. Espino IEE12
M 0700 – 1000
DRAW110L
• Drawing Table - is, in its antique form, a kind of
multipurpose desk which can be used for any
kind of drawing, writing or impromptu
sketching on a large sheet of paper or for reading
a large format book or other oversized document
or for drafting precise.
•
• T- square - a T-shaped instrument for drawing or
testing right angles.
• Metric scale - is the system of measurement used
in the metric system.
• Triangles (45x45, 60x30 scale) - A three-
sided ruler, typically has two equal sides which
meet at a 90 degree angle joined to a third side at
a 45 degree angle. Used to identify true bias lines
or to square a corner.

9. Instrumental Drawing9
John Paul B. Espino IEE12
M 0700 – 1000
DRAW110L
• Compass - an instrument for drawing circles and arcs and measuring
distances between points, consisting of two arms linked by a movable joint, one
arm ending in a point and the other usually carrying a pencil or pen.
• Pencil - an instrument for writing or drawing, consisting of a thin stick of
graphite or a similar substance enclosed in a long thin piece of wood or fixed in
a metal or plastic case. The best pencil for instrumental drawing on most
surfaces are the H, F, and HB grades.
• Mechanical Pencil - a pencil with a plastic or metal case and a thin
replaceable lead that may be extended as the point is worn away by twisting the
outer casing.
• Irregular Curve - is a set of pixels that define a curve that does not fit the
perimeter of a conic section.

10. Instrumental Drawing10
John Paul B. Espino IEE12
M 0700 – 1000
DRAW110L
• Templates - a shaped piece of metal, wood, card, plastic, or other material
used as a pattern for processes such as painting, cutting out, shaping, or
drilling.
• Technical Pen - is a specialized instrument used by an engineer, architect,
or drafter to make lines of constant width for architectural, engineering,
or technical drawings. A "rapidograph" pen is a trademarked name for one
type of technical pen.

11. Instrumental Drawing11
John Paul B. Espino IEE12
M 0700 – 1000
DRAW110L
• Drawing Paper - a paper specially prepared for the use of
drawers (such as draftsmen or sketchers).
• Dusting Brush - a brush used for dusting.
• Drafting machine - is a tool used in technical drawing, consisting
of a pair of scales mounted to form a right angle on an articulated
protractor head that allows an angular rotation.

12. Instrumental Drawing12
John Paul B. Espino IEE12
M 0700 – 1000
DRAW110L
• Geometric figures/ Polygons - is a
plane figure that is bounded by a finite
chain of straight line segments closing in a
loop to form a closed chain or circuit. These
segments are called its edges or sides, and
the points where two edges meet are
thepolygon's vertices (singular: vertex) or
corners.

13. References
13
John Paul B. Espino IEE12
M 0700 – 1000
DRAW110L
• www.m-w.com
• Google Search Definitions
• wikieducator.org/images/9/9c/FT101.pdf
• web.aeromech.usyd.edu.au
• https://www.google.com.ph/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=technical+drawing+deifinition
• https://www.google.com.ph/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0CCIQFjABahUKEwi1suKi
0fTHAhWWf5IKHZgsCBo&url=http%3A%2F%2Fwww.merriam-webster.com
• https://www.google.com.ph/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0CAcQjRxqFQoTCPG0l
LPB9McCFYMVkgodkoQKSQ&url=http%3A%2F%2Fwww.mclarenelectronics.com
• https://www.google.com.ph/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CB8QFjAAahUKEwix1JL
b1vTHAhUPFpIKHTCdDvU&url=http%3A%2F%2Fwww.vcaa.vic.edu.au
Bibliography
John Paul Bacolod Espino (March 19, 1998) is a 16 years old male Filipino student, son of Corazon B. Espino
and Diosdado B. Espino. He graduated in Maddalena Starace School Elementary (2011) and Highschool at
2015.

14. References
 https://www.google.com.ph/webhp?sourceid=chrome-
instant&ion=1&espv=2&ie=UTF-8#q=technical+drawing+deifinition
 https://www.google.com.ph/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad
=rja&uact=8&ved=0CCIQFjABahUKEwi1suKi0fTHAhWWf5IKHZgsCBo&url=http%3
A%2F%2Fwww.merriam-
webster.com%2Fdictionary%2Fdrawing%2520paper&usg=AFQjCNGPQ3pW6oeRk
RNtxo_00j9c1yn_rg&bvm=bv.102537793,d.aWw
 https://www.google.com.ph/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ca
d=rja&uact=8&ved=0CAcQjRxqFQoTCPG0lLPB9McCFYMVkgodkoQKSQ&url=http
%3A%2F%2Fwww.mclarenelectronics.com%2FProducts%2FProduct%2FTyre%2520
Pressure%2520Receiver&bvm=bv.102537793,d.aWw&psig=AFQjCNF0NlICMqJmoj
EYKx9vWbS_f-2wmA&ust=1442250889262076
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