2. Objectives
• Identify and describe the usage for
common line types
• Identify two different methods in
which an object is represented on a
print
• Identify the proper orientation of the
views used in an orthographic
projection
4. Basic Lines
• Each line type has a separate
meaning
• Line determines:
– Shape of object
– Dimensioning
5.
6.
7.
8.
9.
10. Basic Views
• Drawings describe an object in
sufficient detail to permit fabrication
• Orthographic projection: exact form
of object shown by various views
11. Basic Views (cont’d.)
• Views have a definite arrangement
– Top view directly above and in line
with front view
– Right side view to the right and in line
with front view
– In accordance with third angle
orthographic projection
12.
13. Basic Views (cont’d.)
• No limit on number of views
– Three usually sufficient
– Bottom left and side views may be
included
• Front view gives best indication of
shape and detail
• Profile selected for front view
describes most detail
14. Basic Views (cont’d.)
• Views have a specific position with
relation to each other
– Horizontal or vertical alignment
15.
16. Summary
• Lines determine shape and
dimension of object
• Drawings describe object in
sufficient detail for fabrication
• Views have specific arrangement
• No limit on number of views
• Profile selected for front view
describes the most detail
