Danger said:I did an awful lot of draughting by hand (even built my own table with a really nice machine and all of the fun tools), but I studied it only in grade 9 and 10. (It wasn't available in higher grades at my school.)
The way that I remember it is that auxiliary views are simply alternates to the normal ones, such as close-ups of exploded components. Sectionals are cut-aways, as if part of the object has been removed to reveal something behind it without the confusion of using hidden lines.
I'm not 100% sure about that, but it's the way that I was taught.
Auxiliary and sectional views are two types of orthographic projections used in drafting to show more details and dimensions of an object from different angles.
Auxiliary and sectional views are used to provide a more comprehensive and accurate representation of an object, especially when the object has complex shapes or features that cannot be fully shown in the primary views.
Auxiliary views are created by projecting the features of an object onto an auxiliary plane that is perpendicular to the primary view. Sectional views are created by cutting an object along a specific plane and showing the internal details of the object.
Auxiliary views are used to show features that are not parallel to any of the primary views, while sectional views are used to show internal features and details of an object. Additionally, auxiliary views are projected onto an auxiliary plane, while sectional views are created by cutting the object along a specific plane.
It depends on the complexity of the object and the level of detail needed. In some cases, auxiliary views may not be necessary if the object can be fully represented in the primary views, while sectional views may not be needed if the internal features are not relevant or can be shown in other ways. However, in most cases, auxiliary and sectional views are used to provide a more accurate and detailed representation of an object.