Homework Assignment 1 - Sketching
Due 9:30 am, Tuesday, September 10, 1996
Statement: Sketching is a rapid, freehand method of drawing rather than drawing with
instruments. Moreover, sketching is a thinking process as much as a method of communication.
Designers usually develop their ideas by making many sketches before arriving at the final
solution. Designers with sketching skills can use their sketches to assign the drafting of finished
drawings to assistants. Without sketching skills, designers are usable to utilize their helpers
effectively. Many new products and projects have begun as sketches made on the back of an
envelope or on a napkin at a restaurant table. Sketching also helps to communicate on the job
when words are inadequate. The ability to communicate by any means is a great asset, and
sketching is one of the best ways to transmit ideas.
1. Three-View Sketching of the Following Objects. It is recommended that you use the top,
front, and right-sided views. These views should contain
(1) three types of lines: visible lines, hidden lines, and centerlines. Visible lines are
the thickest lines. The hidden lines are dashed lines, which are thinner,
representing features that cannot be seen in a view. The centerlines are the
thinnest lines used to characterizing the symmetric features.
(2) dimensions. Working drawings must show dimensions and contain notes
conveying sizes, specifications, and other information. With the addition of
dimensions and notes, drawings will serve as manufacturing documents.
2. Sketching isometric drawings. This is a reversing process to construct a three-dimensional
view of the object from the given projection views. Mark the dimensions on the isometric
drawings.
