Dimensioning problems

Dimensioning problems

Anonymous
Not applicable
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Message 1 of 14

Dimensioning problems

Anonymous
Not applicable

Hopefully there is an easy 'fix' for this...and someone can help me. We draw our home plans in AutoCAD Architecture 1015. Our dimensioning is set to: Primary units set to Architectural, Precision set to 1/32", Round Off set to 0", Zero Suppression checked for 0 Feet, and Scale factor set to 1.0000. Tolerancing method set to None. What has been happening for quite some time and I mean many many months, is that we will place our windows and doors /walls and sometimes when we go back in to dimension our plans, the dimensions that fall in place are a 32nd and/or 16th...even though if we run the Distance command it does not show this and we did not place them at 32nd's or 16th's. This does NOT happen with every drawing although and we have not yet found a resolve for this. Obviously we do not want our floorplans and rafter centerlines at 32nd's or 16th's if at all possible, however we do have drawings that we draw for the cutting of the homes that need to be at 32nd's for our shop drawings. The floorplan drawings and the shop drawings are drawn on different .dwg files at a different time and using different template files anyway. This has never been a problem before but has started to happen and get worse. What might have changed that I can check on our templates and/or drawings to fix this issue? I am not an AutoCAD genius, so if you respond, please explain so that i understand. Thank you in advance for everyone's help!

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Replies (13)
Message 2 of 14

leothebuilder
Advisor
Advisor

Do you have any lisp routines running that maybe alter the set values for dimension styles?

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Message 3 of 14

David_W_Koch
Mentor
Mentor

I am assuming that the description you gave are the settings in the Dimension Style you are using for your dimensions.

 

What are your Units settings, specifically, to what value is the linear precision set?  If your linear precision is set to 1/8", 1/4" or higher, the DIST command and the Properties palette will display linear dimensions rounded to that precision.  If items are placed in an imprecise manner, then even though the DIST command indicates that a reference point on that item is 5'-0" away from another reference, when you dimension those same references, it could easily read 5'-0 1/32" or 4'-11 15/16".

 

I like setting imperial drawings to Engineering units (feet, inches and decimal inches) with a precision of at least five decimal places, to make it easy to catch things that are slightly off, and fix them before that error snowballs as other objects are placed relative to the inaccurately placed one.


David Koch
AutoCAD Architecture and Revit User
Blog | LinkedIn
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Message 4 of 14

Anonymous
Not applicable

Possibly yes...however these are the same LISP routines that we have had and used for many years....used on older versions of AutoCAD and up until this version....with some tweaking over the course of the years of course to get them to work with the newer versions.

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Message 5 of 14

Anonymous
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My Unit Format is Architectural and my precision for linear dimensions says 0'-0 1/32".

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Message 6 of 14

leothebuilder
Advisor
Advisor

I would check the lisp routines and make sure there is nothing that resets the dimension variables.

And as David suggested increase the precission in the drawing units.

I use architectural units and have the precission set at 1/256"

When using the distance command this will give you a very precise result.

Note that this is different from the dimension style precission / round off

 

For the dimension style I set the precission to 1/16"

 

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Message 7 of 14

Victoria.Studley
Autodesk
Autodesk

Hi @Anonymous,

 

Thank you for posting your question here in the community.

 

Could you post a file for us to analyze?

 

Perhaps there is a setting or workflow issue we could identify by taking a look at a file where the issue is occurring.


Victoria Studley
Principal Experience Designer - Fusion Configurations
Join us in the Fusion Insider Program
Fusion Learn & Support | Fusion Documentation
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Message 8 of 14

Anonymous
Not applicable

That would be wonderful...here is one that we had problems with....like i mentioned...it is not every file but this was one that was most recent. Refer to the floorplan and the dimensions to the exterior of the wall on the left side by the fireplace...Thank you! 

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Message 9 of 14

David_W_Koch
Mentor
Mentor

I looked at your drawing, and the issue is similar to what I had previously said.

 

Your FlrDoor-Window dimension style has a precision of 1/32" and a roundoff of 0 (to eight decimal places).

 

Your drawing units have a linear type of Architectural (feet, inches and fractional inches) and a linear precision of 1/16".

 

The two windows that flank the fireplace have a dimensioned distance of 12'-4 7/32".

Using the DIST command, the reported distance is 12'-4 1/4".

Changing the draiwng units to Engineering (feet, inches and decimal inches) and setting the linear precision to eight decimal places, the DIST command reports a distance of 12'-4.214875000".  That is exactly 12'-4 7/32", so the dimension is behaving as expected.  That is exactly half-way between 12'-4 3/16" and 12'-4 1/14", so it gets rounded up to 12'-4 1/14" by the DIST command when the linear drawing units are set to Architectural with a precision of 1/16".  So the DIST command is behaving as expected.

 

There is no problem here, other than in the selection of drawing units or the precision with which the objects were placed.  If you do not want a dimension that contains thirty-seconds of an inch, do not place objects exactly an odd number of thirty seconds of an inch apart.  If you want the DIST command to tell you when objects have been placed that way, increase the precision of the linear drawing units to at least 1/32".


David Koch
AutoCAD Architecture and Revit User
Blog | LinkedIn
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Message 10 of 14

pendean
Community Legend
Community Legend
>>>... This does NOT happen with every drawing ...<<<
A test: use INSERT command to insert a bad dwg file into a good dwg file, explode it, then try it. Does the problem go away? If not, dig a little deeper, are different dimstyles at play by chance?
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Message 11 of 14

Anonymous
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Forgive me if i'm not understanding completely....when placing windows/doors/etc. we are not placing them at an odd (1/32") dimension. We are placing them at an 'even' dimension. So if i'm placing a window at 5'-0", why is it dimensioning at a 1/32" off? And why is this not on every drawing?

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Message 12 of 14

Anonymous
Not applicable

I did exactly what you suggested and even tried redimensioning and no change.

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Message 13 of 14

David_W_Koch
Mentor
Mentor

@Anonymous wrote:

Forgive me if i'm not understanding completely....when placing windows/doors/etc. we are not placing them at an odd (1/32") dimension. We are placing them at an 'even' dimension. So if i'm placing a window at 5'-0", why is it dimensioning at a 1/32" off? And why is this not on every drawing?


How are you assuring that you are placing a Window at 5'-0" from some reference point?  Are you typing the exact distance as a relative distance from the reference point, or are you "eyeballing" a number in a temporary dimension or in the coordinates display?  If you are typing in the exact distance, are you using ORTHO or POLAR tracking, or typing in an explicit angle, to be certain that the distance typed is being applied in the desired direction?

 

You may not believe you are placing items in odd 1/32's of an inch, and perhaps you are not doing so every time, but the two windows in your posted file were that way.  Are your drawing units the same (1/16" precision) in your other drawings?  Could SNAP be turned on there, with a relatively large spacing, that would make it impossible to enter a distance with odd 1/32" of an inch by clicking two points, in the files that do not have this problem?


David Koch
AutoCAD Architecture and Revit User
Blog | LinkedIn
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Message 14 of 14

Anonymous
Not applicable

Thank you David. When placing windows or doors, we use the ortho on and would type in a distance such as 5'....

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