Assignment 1 Engineering Lettering PDF

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Mapua University School of EECE

ASSIGNMENT #1 ENGINEERING LETTERING

ELDRIN JAE T. IBE EE-1

Christy D. Mendoza -Professor-

1. History and Importance of Engineering Lettering

Lettering is an important part of engineering drawing. It gives information regarding size, and instructions, in the form of notes and dimension. On a drawing, whole of the written information is always in the form of lettering. It is not hand written. Also, it may be added here, that Lettering is appropriate and correct words but not printing. Lettering is a fundamental component in both conventional drawing and CAD drawing. Realistic correspondence is frequently insufficient to totally depict an object. Lettered text is important to give definite specifications and about the drawn item. Furthermore, there are various formal rules that apply to the placement of lettering and to undertake production work of an engineering components as per the drawing, the size and other details are indicated on the drawing. This is done in the font of notes and dimensions. Individuals with talent, wisdom, vision, and innovative ideas have influenced the history of engineering drawing. Major changes in agriculture, manufacturing, mining, and transport also greatly influenced the evolution of engineering drawing and had an overpowering effect on socioeconomic and cultural conditions between the eighteenth and nineteenth centuries. Recently and more rapidly, computers have become a driving force in the way people create engineering drawings. (Madsen, 20160217)

2. Proportion of letters Size of Letters is measured by the height h of the CAPITAL letters as well as numerals. Standard heights for CAPITAL letters and numerals recommended by BIS are given below: 1.8, 2.5, 3.5, 5, 6, 10, 14 and 20 mm.

Recommended Size (height h) of Letters I Numerals Main Title Sub-Titles

5 mm, 7 mm, 10 mm 3.5 mm, 5 mm

Drawing number in Title Block and letters denoting Cutting Plane Section Alteration, Enteries and Tolerances

10mm, 12mm

Dimensions, Notes, etc.

2mm, 3mm 2.5 mm, 3.5 mm, 5 mm

3. Guidelines The light thin lines drawn to obtain uniform and correct height of letters are called Guide Lines. Guide line should be drawn very light and thin, so that, they need not be erased after the lettering is finished. To erase guide lines after finishing the lettering is not easily possible. Guide line for capital and lower-case lettering.

4. Styles of letters The lettering, in general, is classified in two categories :1. Gothic Lettering 2. Roman Lettering. Gothic Lettering Lettering having all the alphabets or numerals of uniform thickness is called Gothic Lettering. 1. Vertical Gothic Lettering 2. Italic or Inclined Gothic Lettering. Single Stroke Letters gothic lettering. The word single-stroke should not be taken to mean that the lettering should be made in one stroke without lifting the

pencil. It means that the thickness of the letter should be uniform as if it is obtained in one stroke of the pencil. These are vertical letter having thickness of each line of alphabet or numerals etc. Same as the single stroke of a pencil. Since Stroke means that the letter is written with one or more stems or curves and each made with single stroke.

Double Stroke Vertical Gothic Lettering-Vertical letter drawn by double Stroke of pencil with uniform thickness between these strokes are called Double Stroke Vertical Gothic Lettering.

Double Stroke Inclined Gothic Lettering- Double stroke gothic when inclined at an angle of 75' is called Double Stroke Inclined Gothic Lettering.

Lower Case Vertical Single Stroke Gothic Lettering-Lower case vertical gothic lettering is shown along with its sizes.

Lower Case Vertical Double Stroke Gothic Lettering

Lower Case Inclined Single Stroke Gothic Lettering

Roman Lettering The lettering in which all the letters are formed by thick and thin elements is called Roman Lettering. It may be vertical or inclined or inclined. It can be written with a chisel pointed Pencil or D-3 type Speed Ball Pen.

Free Hand Lettering The writing of alphabets without the use of drawing instruments and in free hand is called Free Hand Lettering. It may be vertical or Inclined Gothic Lettering.

Mechanical Lettering In Mechanical Lettering, standard uniform characters that are executed with a special pen held in a scriber and guided by a template. Mechanical lettering does not normally require the use of lettering guidelines. You will use mechanical lettering principally for title blocks and notes on drawings, marginal data for special maps, briefing charts, display charts, graphs, titles on photographs, signs, and any other time that clear, legible, standardized lettering is required. One of the most popular types of mechanical lettering sets is the LEROY lettering set. The Mechanical Lettering is sometimes done using special type of device called a Pantograph. A PANTOGRAPH is basically a device consisting of four links which are pinned to each other in a parallelogram fashion. The links can move about the hinge. The lowermost link of the parallelogram is fixed to two rigid supports. One vertical link at one end is connected to a profile tracer which traces the profile of the letter to be drawn and the second vertical link and the other horizontal link are jointly connected to a pencil that draws the exact shape of the profile traced.

5. Elements of letters STEM-

6. Methods of Construction a) Freehand lettering is done without the assistance of tools. To regulate lettering height, commonly 3 mm (1⁄8-in), guidelines are drawn. b) Mechanical lettering is done using tools such as lettering guides, templates, or using a small mechanical pantograph referred to by the Keuffel and Esser trademark "Leroy" c) Modern drawings are lettered with computer-aided design software.

Bibliography Websources: https://edengdrawing.blogspot.com/2013/02/technical-lettering.html https://www.bartleby.com/essay/Engineering-Lettering-PKXCRJDK86VS http://dl.icdst.org/pdfs/files1/2ebf86ac14d0b113b55d92e58f502321.pdf

Books: Madsen, D. A., Madsen, D. P. (20160217). Engineering Drawing and Design, 6th Edition [VitalSource Bookshelf version]. Retrieved from vbk://9781305887923...