gsmst foe 04 sketching and dimensioning part 3 07

Engineering Drawing

Sketching SkillsGSMST

Objectives

Tips and TechniquesLetteringPatience and practice needed

3

Sketching

Although most final drawings are computer generated, initial and freehand sketches are vital to the design processFreehand does not mean messy. Sketches should display an adequate amount of detail, and any pertinent notes/comments pertaining to the drawing For instance, if a line is supposed to be

straight, make it as straight as possible. A square will not pass for a circle.

Sketching

Sketching is a rapid, freehand method of drawing without the use of drawing instruments. Sketching is also a thinking process and a method of communication.

SketchingThis is not artistic sketching, but technical sketchingEmphasis will be on sketching geometric figures to represent features of objectsMedium grade pencils work best for sketchingAll lines should be dark enough to standout from the page

Engineering Drawing RulesAlways use a Pencil.Make all lettering the same size.Use Engineering or Drafting Paper.

Pencil Lead Designation

Note: Reverse order below

Sketching Tips

Sketching straignt lines does not mean they have to look like they are machine drawn.

Sketching TipsIf you don’t have a ruler, you can estimate dimensions using your pencil when sketchingAlways keep your pencil at arms length. Why?

Sketching Tips

Layout of drawing using your pencil for dimensional reference

Lettering

The style of engineering lettering we will use in this course is Single Stroke Gothic Lettering An example of the characters is

shown on drawing numbers 1 and 2 Notice that only capital letters are

demonstrated, since we will use only capital letters on drawings

12

Lettering Notes

Lettering Guidelines – HandoutLettering Styles Shape of Letters Order of Drawing LinesCharacter UniformitySpacing

Single Stroke Gothic Lettering

14

Lettering – Vertical Gothic Font

Lettering with Fractions

Sketching Techniques