Drafting Question: What are auxiliary and sectional views?

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Discussion Overview

The discussion centers on the concepts of auxiliary and sectional views in the context of orthographic projections in drafting. Participants share their understanding and experiences related to these views, particularly in manual drafting, and explore their significance and applications.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant requests clarification on auxiliary and sectional views, emphasizing a focus on hand drafting without references to software.
  • Another participant describes auxiliary views as alternatives to standard views, providing close-ups of components, while sectional views are characterized as cut-aways revealing internal details without hidden lines.
  • A different participant echoes the previous explanation, indicating a lack of formal training but recalling similar definitions.
  • Further elaboration on auxiliary views includes their role in providing dimensional information that may be difficult to extract from standard views, suggesting they are more relevant for training in manual drafting.
  • One participant mentions the term "assembly drawing" in relation to exploded views, indicating a personal preference for this type of drawing from their drafting experience.

Areas of Agreement / Disagreement

Participants generally agree on the basic definitions of auxiliary and sectional views, but there is some uncertainty regarding the details and applications of these concepts, particularly in relation to modern drafting tools.

Contextual Notes

Some participants express uncertainty about their recollections and definitions, indicating that their understanding may be based on limited training or experience. The discussion does not resolve the nuances of how these views are applied in contemporary drafting practices.

Who May Find This Useful

This discussion may be useful for individuals interested in manual drafting techniques, particularly those seeking to understand the roles of auxiliary and sectional views in orthographic projections.

Bipolarity
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What are auxiliary and sectional views when making orthographic projections? I missed class today, so I would like if someone could explain their significance in drafting.

P.S. I am drafting by hand, so no references to auto-CAD or SolidWorks please.

BiP
 
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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.
 
Like Danger, without any formal training since high school, I would have said the same thing as he.
 
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 views are projections onto a plane that is not one of the three orthogonal planes. They are (Or were) used to provide dimensional information that was difficult to extract from the normal top, side, and front views or isometric drawings. With today's 3D drafting tools they are probably only useful in training to develop visualization skills for manual drafting.

Sectional drawings are as you described.

Exploded View drawings (my favorite when I was a draftsman in the dark ages BC - before computers) were considered an assembly drawing in our terminology.
 
Thanks for the info, NUCENG.
I can't afford any kind of draughting software, so I do my stuff in Inkscape (or Illustrator if I fire up one the the G3's). Auxiliaries are still quite handy to me.
Now that you've mentioned it, I remember the term "assembly drawing". I'd forgotten in the 40 years since school.
 

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