Primary unit is fraction, how to control when override to decimal?

[Bouing]

In a drawing, I've setted my primary dimension as fraction. For some dimensions I overrided them to decimal but I don't know from there how to control the number of digits as default. In unit you have the option to set the fraction denominator or the decimal numbers, not both.

I went to option-document-dimension-precision with no success as well. I can just override it at the dimension tab ("other", but cannot find where is the document setting for decimal format when fraction is the default)

 

[JMirisola]

There isn't a system option for what you're trying to do. The only thing you can do, after overriding the dimension, is to click on the value tab and adjust the number of decimal places under Tolerance/Precision. You could use dual dimensions and set the value of the second dimension to use decimals instead of fractions.

Jeff Mirisola, CSWP, Certified DriveWorks AE

http://designsmarter.typepad.com/jeffs_blog

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[CorBlimeyLimey]

Favourites?

 

[Bouing]

The funny part is that when your override it, you can adjust, for every dimension, the number of digits and one choice is x.xx(documents). Where is ti pointing?

 

[EEnd]

At least on 2008 SP5, it appears to be pointing to the value set for the decimal dimension. You could change the default type to decimal, set the number of digits and then change the units back to fractions. Previously overridden dimensions will not be changed, but newly overridden (or re-overridden) ones will.

Eric

 

[ctopher]

Bouing,
If I read correctly, you're mixing fractions and decimals together on drawings?

Chris
SolidWorks/PDMWorks 08 3.1
AutoCAD 08
ctopher's home (updated Aug 5, 2008)
ctopher's blog
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[Bouing]

cotpher,

Yes, the whole drawing is in fraction but some holes and positionning are critical and I nedd to put x.xxx value but the default (when overridden) is set to x.xx and I am wondering how to change it to x.xxx. MOreover that when you override it you can adjust the number of digits to (document!)

 

[ctopher]

The entire drawing needs to be one or the other.
To answer your question, I think double-click on the dim and manually change it?

You may email me.

Chris
SolidWorks/PDMWorks 08 3.1
AutoCAD 08
ctopher's home (updated Aug 5, 2008)
ctopher's blog
SolidWorks Legion

 

[CorBlimeyLimey]

"The entire drawing needs to be one or the other."

Why? Because some standard says to do so? Whadda they know?

Seriously though, fractions have been used as a means of indicating tolerance for a long time.

Tolerance (Unless Specified)
.XXX = ± .005"
.XX = ± .010"
.X = ± .020"
Fractions = ± 1/32"

 

[ctopher]

Mixing them can be an issue. Rounding a fraction vs a decimal dim sometimes will not be the same.

Bouing,
Check your company stds, I 'think' this is not allowed.

Chris
SolidWorks/PDMWorks 08 3.1
AutoCAD 08
ctopher's home (updated Aug 5, 2008)
ctopher's blog
SolidWorks Legion

 

[CorBlimeyLimey]

Rounding a decimal (.625 to .62 or .63) can create the same issue ... but company standards should take precedent.

 

[ctopher]

I agree to follow company standards, but company standards should be based on industry standards.
See 10.2.2.2, pg 89:

http://mscweb.gsfc.nasa.gov/543web/files/GSFC-X-673-64-1F.pdf

I have had too many arguments with machinists that round the fractions vs decimals differently.

Chris
SolidWorks/PDMWorks 08 3.1
AutoCAD 08
ctopher's home (updated Aug 5, 2008)
ctopher's blog
SolidWorks Legion