3D dimensions in TechDraw

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Msegade
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3D dimensions in TechDraw

Postby Msegade » Mon Apr 24, 2017 12:16 pm

I want to make some 3D dimensions in the TechDraw module in an isometric view, the problem is that the dimensions lines are perpendicular to the projected line, and I want them in the direction of the axis.

Is this possible?
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beam.png
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wandererfan
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Re: 3D dimensions in TechDraw

Postby wandererfan » Mon Apr 24, 2017 3:00 pm

Msegade wrote:Is this possible?
No. Is this a common convention?
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NormandC
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Re: 3D dimensions in TechDraw

Postby NormandC » Mon Apr 24, 2017 5:01 pm

Yes.

Following image quickly made in the drawing module of a proprietary CAD program.
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Dimensioned_Iso_View.jpg
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yorik
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Re: 3D dimensions in TechDraw

Postby yorik » Tue Apr 25, 2017 3:31 pm

NormandC wrote:Following image quickly made in the drawing module of a proprietary CAD program.
The text stays aligned like in techdraw... It would be just a matter of skewing the extension lines actually...
Marco_T
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Re: 3D dimensions in TechDraw

Postby Marco_T » Tue Apr 25, 2017 10:35 pm

wandererfan wrote:
Msegade wrote:Is this possible?
No. Is this a common convention?
Look at ISO 5456-3... I think Normand is right.

Sorry for non english links:
https://books.google.it/books?id=r3irIp ... -3&f=false

https://books.google.it/books?id=Nd0yK- ... -3&f=false

http://joho.p.free.fr/EC/COURS%20DOC/PE ... RIQUES.pdf

--
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NormandC
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Re: 3D dimensions in TechDraw

Postby NormandC » Wed Apr 26, 2017 1:36 am

On that third link, I can translate the relevant French text:
Dimensioning should be avoided in axonometric views. If it is necessary, the same rules as those used for orthogographic views should be employed.
To amend what I succinctly replied at the end of my lunch break: I don't think dimensioning axonometric views is considered an "official" convention in either of the existing norms (ISO, ANSI...), but it is commonly used nonetheless. And yes, the dim extension lines should be parallel to the XYZ axes.