1) Set your limits in Model Space to 19.5, 12.5
2) Using the proper layers and dimension styles, accurately draw and dimension the widget as shown on
the last page. See page 3 for construction tips.
a. Select "Show menu bar" and make use of the "Construction
Line" tool (found under the "Draw" pull-down menu) for laying
out the linework per the dimensions shown. Note that
construction lines are "Rays" of infinite lengths that will extend
horizontally, vertically, and at specified angles, but they will not
plot. Be sure to use the "CONSTRUCTION" layer for these rays,
and the "OBJECT" layer for the actual object lines.
ana
im
Autodesk AutoCAD 20
Draw Dimension Modify
Modeling
Line
Ray
Construction Line
Multiline
NOTE! All arcs and lines must be tangent. Be sure to utilize the "tangent" and "center" object snaps
when completing this drawing. Utilize circles drawn by Tangent, Tangent, Radius (TTR).
1
widget
NOUN
informal
1 A small gadget or mechanical device.
3) Complete "SECTION A-A". Add a centerline to the thru hole and add an Annotative Hatch using the
ANSI31 pattern and a hatch scale of 1. Check your hatch annotation scale(s) in the Properties palette.
1/n4) Prior to adding dimensions, utilize the "Center Mark" tool from the Annotation
ribbon and place them as shown on the attached example. Once the center marks
are inserted, the lines can be stretched or shortened by using the grips that appear
when the center mark is selected. These center marks should be placed on the
"CENTERLINE" layer. Do not draw your centerlines manually.
i. What is the length of line 'a'?_
5) When you think you are finished, check your drawing for accuracy. Even if your dimensions match
what is on the example, you can still have lines and arcs that are not tangent. Zoom in close if you need
to. There should be no lines/arcs overlapping and there should be no gaps between lines and arcs.
a. Using the Properties palette, individually select the lines labeled 'a' and 'b':
(round to 3 decimal places)
(round to 3 decimal places)
(round to 3 decimal places)
(round to 3 decimal places)
ii. What is the angle of line 'a'?
iii. What is the length of line 'b'?
VOTRCIC
Center Centerline
Mark
iv. What is the angle of line 'b'?.
Centerlines
6) Switch over to paper space by selecting the "ANSI A" layout tab. A viewport already exists in its proper
location; however, the dimensioned widget must be displayed in the viewport at a scale of 1:2. HINT:
To assist in centering the widget in your viewport, double-click inside the viewport to switch to Model
Space and then do a Zoom All. This will get it close to being centered by utilizing the drawing limits that
you set in the beginning, but the scale will be off. Set the viewport scale to 1:2 and then LOCK YOUR
VIEWPORT! If your dimensions and/or text are not being displayed in your viewport, check your scales.
Fig: 1
Fig: 2