Wilsons Sandbox

Cadintosh users:

I'm now having a different problem with Cadintosh. My drawing was
created with millimeters as the unit of measure -- I was copying from a
paper drawing that was in mm. I am using inches as the alternate unit
of measure. The issue is this:

In: Options Menu - Dimensions - Global Settings the alternative unit is
"inches". The factor (it came pre set) is .0394. But I think that this
is wrong. The correct factor is .03937. When I input that number into
the "Alternative Unit" field, I get correct conversions of the
underlying millimeter measurements. BUT, if I open the "Dimensions"
screen again for any reason, that field automatically reverts to .0394,
resulting in incorrect measurements. For all I know, some other action
may also cause the factor to revert. I'm only sure that I produced a
drawing with mostly wrong measurements.

Jon Oshima

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>In: Options Menu - Dimensions - Global Settings the alternative unit is
>"inches". The factor (it came pre set) is .0394. But I think that this
>is wrong. The correct factor is .03937. When I input that number into
>the "Alternative Unit" field, I get correct conversions of the
>underlying millimeter measurements. BUT, if I open the "Dimensions"
>screen again for any reason, that field automatically reverts to .0394,
>resulting in incorrect measurements. For all I know, some other action
>may also cause the factor to revert. I'm only sure that I produced a
>drawing with mostly wrong measurements.

On Aug 24, 2006, at 11:03 AM, Rowland Carson wrote:

> At 2006-08-23 17:18 -0400 jroshima@aol.com wrote:
>
>> In: Options Menu - Dimensions - Global Settings the alternative unit
>> is
>> "inches". The factor (it came pre set) is .0394. But I think that this
>> is wrong. The correct factor is .03937. When I input that number into
>> the "Alternative Unit" field, I get correct conversions of the
>> underlying millimeter measurements. BUT, if I open the "Dimensions"
>> screen again for any reason, that field automatically reverts to
>> .0394,
>> resulting in incorrect measurements. For all I know, some other action
>> may also cause the factor to revert. I'm only sure that I produced a
>> drawing with mostly wrong measurements.
>
> Jon - things may not be as bad as you think. I've not used the
> alternative units option before, but I did the following experiment
> (in CADintosh X v5.3.2) to test its behaviour.
>
> Open new drawing with mm as standard unit. Set decimal places in
> dimensions dialogue to 3. Draw line 100mm long. Dimension it and it
> is labelled "100.000". Switch to alternative units. Dimension the
> same line again, it is now labelled "3.940Inch". Go to the dimensions
> dialoge and change the conversion factor to the true value of 0.03937
> (although it still displays as 0.0394 when next viewed). Dimension
> the line again - it is now labelled "3.937Inch".
>
> My conclusion is that if you set the conversion factor to the true
> value before you create the dimensions, the values displayed will be
> correct, within the decimal places displayed.
>
> If you drew the objects to the correct sizes in mm, they will be OK.
> But in order to show their exact equivalent sizes in inches, you will
> need to delete all the dimensions (or those created before the
> converson was correctly set) and re-create them after setting the
> conversion factor to the correct value. At least this is less tedious
> than re-drawing everything!
>
> As I said, I have not used alternative units before, but I would be
> pleased if Thorsten could make the default conversion factor correct,
> irrespective of the number of decimal places displayed in the
> dialogue. It would be even better if more places were displayed in
> the dialogue box so that there was no doubt what factor was in use.
>
> regards
>
> Rowland
> --
> | Wilma & Rowland Carson http://home.clara.net/rowil/
> | ... that's Rowland with a 'w' ...
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>

> /David
> /David A. Gaarder AIA
> UW School of Medicine and Public Health
> Medical Sciences Center Rm. B87
> 1300 University Avenue
> Madison, WI 53706
>
> 1.608.262.1100
> FAX (608) 263-6463

> On Aug 24, 2006, at 11:03 AM, Rowland Carson wrote:
>
> At 2006-08-23 17:18 -0400 jroshima@aol.com wrote:
>
> In: Options Menu - Dimensions - Global Settings the alternative
> unit is
> "inches". The factor (it came pre set) is .0394. But I think
> that this
> is wrong. The correct factor is .03937. When I input that number
> into
> the "Alternative Unit" field, I get correct conversions of the
> underlying millimeter measurements. BUT, if I open the "Dimensions"
> screen again for any reason, that field automatically reverts to
> .0394,
> resulting in incorrect measurements. For all I know, some other
> action
> may also cause the factor to revert. I'm only sure that I
> produced a
> drawing with mostly wrong measurements.
>
>
> Jon - things may not be as bad as you think. I've not used the
> alternative units option before, but I did the following experiment
> (in CADintosh X v5.3.2) to test its behaviour.
>
> Open new drawing with mm as standard unit. Set decimal places in
> dimensions dialogue to 3. Draw line 100mm long. Dimension it and it
> is labelled "100.000". Switch to alternative units. Dimension the
> same line again, it is now labelled "3.940Inch". Go to the dimensions
> dialoge and change the conversion factor to the true value of 0.03937
> (although it still displays as 0.0394 when next viewed). Dimension
> the line again - it is now labelled "3.937Inch".
>
> My conclusion is that if you set the conversion factor to the true
> value before you create the dimensions, the values displayed will be
> correct, within the decimal places displayed.
>
> If you drew the objects to the correct sizes in mm, they will be OK.
> But in order to show their exact equivalent sizes in inches, you will
> need to delete all the dimensions (or those created before the
> converson was correctly set) and re-create them after setting the
> conversion factor to the correct value. At least this is less tedious
> than re-drawing everything!
>
> As I said, I have not used alternative units before, but I would be
> pleased if Thorsten could make the default conversion factor correct,
> irrespective of the number of decimal places displayed in the
> dialogue. It would be even better if more places were displayed in
> the dialogue box so that there was no doubt what factor was in use.
>
> regards
>
> Rowland