Active Member
Posts: 10
Registered: ‎03-21-2008
Message 1 of 5 (172 Views)

# scaling fractions

172 Views, 4 Replies
09-20-2008 12:51 PM
I am new at scaling drawings--I attempt to scale a drawing and it ask me to specify scale factor and enter 1/2"=1'. I get the error message "numeric distance or two points required.
HELP PLEASE??? Thank You!!
Frank Carson
Distinguished Contributor
Posts: 668
Registered: ‎02-22-2008
Message 2 of 5 (172 Views)

# Re: scaling fractions

09-20-2008 01:32 PM in reply to: frank1737
12 divide 1/2 = 24
*George Drayton
Message 3 of 5 (172 Views)

# Re: scaling fractions

09-20-2008 01:48 PM in reply to: frank1737
You may be "missing" the scale concept. In CAD we draw/model at full
size in model space. We zoom in and out to see the parts of the
drawing/model that we wish to see or work on. To produce a plot, we use
a Layout with a view of all or some of the model space stuff. It is
this "VIEW" which is accurately "scaled" prior to printing. The
viewports toolbar contain commands which help this process but there are
other ways too.

George Drayton CD-CAD Ltd Christchurch New Zealand
*Aug
Message 4 of 5 (172 Views)

# Re: scaling fractions

09-23-2008 05:43 AM in reply to: frank1737
And by the way,....the scale for 1/2"=1' is 0.041666666.

Aug
Distinguished Contributor
Posts: 1,190
Registered: ‎06-03-2005
Message 5 of 5 (172 Views)

# Re: scaling fractions

09-27-2008 04:13 PM in reply to: frank1737
> {quote:title=frank1737 wrote:}{quote}I am new at scaling drawings--I attempt to scale a drawing and it ask me to specify scale factor and enter 1/2"=1'. I get the error message "numeric distance or two points required. HELP PLEASE??? Thank You!! You are getting this error message because you are attempting to enter an architectural value when your units are not set to accept feet/inches as an input. You don't want to use an equation either. 1/2"=1'-0" is equal to a scale factor of 1/24th (or .0416666667).

The normal school of thought is to draw full scale (1:1) in model space and outline what you want printed in a viewport in a Layout scaled to the output scale you want (in your example 1/2"=1'-0"). I still prefer the old model space method of scaling the title block border up around the objects at 1:1 (even in Layouts). The border is drawn to fit the paper and scaled up by the dimscale factor (24) then plotted to fit. Scales are set for dimensioning and plotting, not drawing.

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Michael Grutter
Cedar Engineering and Design Service
http://www.cedarengineering.com/

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