![]() Breaks for rectangular metal or wood are drawn freehand, whether using traditional tools or CAD.” ( Technical Graphics Communication by Bertoline, Wiebe, Miller, Nasman, ISBN 7-X, p. These same procedures are followed with CAD, as well. For larger parts, the figure “8” is drawn using a template or compass, following the procedures shown in Figure 14.51. ![]() With CAD, the SPLINE command can be used to create irregular curves. Cylindrical or tubular material is represented as a figure “8” or “S.” For very small parts, the figure “8” can be drawn freehand or using an irregular curve. (Figure 14.49) Examples of the conventional breaks used for different materials and cross sections are shown in Figure 14.50. The printed dimension specifies the true length. If you are seeing STBs and you want to switch to CTBs, go to your OPTIONS dialogue box > 'Plot and Publish' tab, lower right corner is a 'Plot Style Table Settings' pickbox > set the 'Default plot style behavior for new drawings' to 'Use color dependent plot styles'. Shortening the length of a part leaves room for the part to be drawn to a larger scale. “Conventional breaks are used for revolved section views or for shortening the view of an elongated part, such as a shovel handle or vehicle axle.
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