# Thread: Scaling in isometric View

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## Scaling in isometric View

Good morning......... I have a doubt about isometric drawing preperation of piping.Is it possible to prepare in scale?that is angle and other dimensions in scale.Is it NTS or SCALED?normally it is NTS(not in scale)?please reply as soon as possible.Thanking you....

With best regards,

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## Re: Scaling in isometric View

The concept of scale doesn't really apply in isometric views because the x and y scales are always different.

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## Re: Scaling in isometric View

Originally Posted by BinuM
Good morning......... I have a doubt about isometric drawing preperation of piping.Is it possible to prepare in scale?that is angle and other dimensions in scale.Is it NTS or SCALED?normally it is NTS(not in scale)?please reply as soon as possible.Thanking you....

With best regards,
You can draw it with a scale in mind, but it wouldn't have a scale called out.
You just want to avoid someone putting a scale on it to get dimensions.

I've done some isometric drawings where lines were drawn and dimensioned at the correct length, but the scale was stated: "N.T.S."

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## Re: Scaling in isometric View

Iso's can't be to scale since each line is foreshortened to the plane of projection. NTS is the only way to go.

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## Re: Scaling in isometric View

Originally Posted by Richard.Kent
Iso's can't be to scale since each line is foreshortened to the plane of projection. NTS is the only way to go.
Not entirely true. A 3D view set to one of the OOTB Iso (e.g. SW) can be scaled if you use a scale factor of 1.22474487*<desired scale>.

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## Re: Scaling in isometric View

The OP asked about an isometric drawing which is a 2D drawing, so my comment stands. Even still, calling a 3D iso view to scale still seems wrong to me.

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## Re: Scaling in isometric View

Originally Posted by RobertB
Not entirely true. A 3D view set to one of the OOTB Iso (e.g. SW) can be scaled if you use a scale factor of 1.22474487*<desired scale>.
x and y scales in the view plane will be different.

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## Re: Scaling in isometric View

Originally Posted by Richard.Kent
Iso's can't be to scale since each line is foreshortened to the plane of projection. NTS is the only way to go.
I agree and disagree.
While I agree that you can't/shouldn't call out a scale for isometric drawings, you can draw them accurately and dimension them. The lines can be drawn to their actual length at their respective isometric angles. It makes the object appear a bit longer in those planes than it actually is, but can be done. This is actually discussed in a book I have from college, it's done to "simplify the drawing an Isometric view".

See the enclosed drawing, I created this in the Isometric snap style.
The lines are drawn and dimensioned to the correct lengths.
I used a dimension style for plotting 1" = 1'-0", but I wouldn't state a "scale".

** The OP's question was (I'm paraphrasing) "Can Isometric drawings be prepared to a scale?"
I say Yes you can draw them accurately (if needed) with a plotted scale in mind but you shouldn't call out a scale.

But..if you're just doing a single-line (schematic) isometric drawing, it doesn't need to be done to any scale (1:1 ps is fine).

That's all I'm sayin'

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## Re: Scaling in isometric View

Originally Posted by RobertB
Not entirely true. A 3D view set to one of the OOTB Iso (e.g. SW) can be scaled if you use a scale factor of 1.22474487*<desired scale>.
Well, techinially it can be dimensioned correctly in CAD using the scale factor, but it can't be scaled. In other words, when it's plotted, a sub can't put a scale on it to get a dimension in the field.

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## Re: Scaling in isometric View

Originally Posted by dzatto
Well, techinially it can be dimensioned correctly in CAD using the scale factor, but it can't be scaled. In other words, when it's plotted, a sub can't put a scale on it to get a dimension in the field.
Wrong. Plot the attached DWF file and place a scale on it. That DWF is of a single 3D box, 1×4×9.

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