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My professor asked me to make the orthographic projection of this object with the third angle rule, but the object has an oblique/slanted surface. Does it require an auxiliary view too?

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  • $\begingroup$ which feature would require an auxiliary view, and why? $\endgroup$
    – jsotola
    Commented Oct 15, 2023 at 17:20
  • $\begingroup$ go with your instinct ... after all, it is an assignment that you should be doing without someone else telling you what to do ... just ask yourself does an auxiliary view add new information? $\endgroup$
    – jsotola
    Commented Oct 15, 2023 at 18:53
  • $\begingroup$ Think of technical drawing like writing a report. Its natural language, you dont have to always use the same construction. If you feel that two views is enough then it probably is. You could use a auxiliary view, cutaway or a partial cutaway... $\endgroup$
    – joojaa
    Commented Oct 17, 2023 at 5:00
  • $\begingroup$ Being a nit picker for wording, the question in the picture states "Draw AN orthographic projection..." as oppose to "Draw the orthographic...". So to me its pick a single view and draw it, though if it is from a practice book, I would draw all the orthographic views I could as a matter of practice. $\endgroup$
    – Forward Ed
    Commented Feb 22 at 13:07

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Does it require an auxiliary view too?

I would think yes to make the dimensions of the dovetail slot clear.

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Your questions is: "Does it require an auxilliary view also?"

It's not part of the assignment as written. I would ask the lecturer/teacher about this question first. I strongly suspect that they only want one of the 2 views but stating the less obvious is to show your calculation of the 60 deg angle measures using trignometry. The horizontal distance being lengthcos(60) and vertical distance being lengthsin(60) with the understanding that arctan 60=Vertical/Horizontal. Going the extra distance without time constraints only pushes your mark higher.

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