Use of X by
Use of X by
(OP)
When using basic dimensions, is the referenced dimension still box. ie 5X [5.00] = ( [15.00] ).
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RE: Use of X by
ASME Y14.5M-1994 shows the quantity inside the basic dimension box on all the figures I just examined. If you are using SolidWorks, the quantity will wind up outside the basic box. I can still see that the dimension is basic.
Anything inside brackets, as per Figure 1-54 is a reference dimension, and should not be boxed. Your [5.00] above is your real dimension. Your calculation of the total is a perfect illustration of why the figure in brackets is for reference only.
I screw up too sometimes.
JHG
RE: Use of X by
The form you are asking about is generally used to denote non-cumulative dimensions, and basic dimensions are non-cumulative by default, so all you really need is 5X [5.00] or [5X 5.00] (either of which is permissable per the standard , para 1.9.5).
If you do use that form, the = should also be in the parenthesis.
The Edge... there is no honest way to explain it because the only people who really know where it is are the ones who have gone over. - Hunter S. Thompson
RE: Use of X by
However, there is nothing in there I'm aware of that says having out of the box is explicitly wrong so I will allow it on drawings I check.
In our CAD system you have to dig down into the settings to get it to be in the box but I've now set our default settings to be that way.
As regards your example, I agree with drawoh that I don't believe the 15 should be boxed.
KENAT,
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RE: Use of X by
So I was a little off track.
KENAT,
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RE: Use of X by
Okay, parentheses it is. :)
JHG
RE: Use of X by
KENAT,
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RE: Use of X by
The Edge... there is no honest way to explain it because the only people who really know where it is are the ones who have gone over. - Hunter S. Thompson
RE: Use of X by
RE: Use of X by
The bottom one is I believe more correct but it should be X not x. Also, while not explicitly stated as far as I can see, the figures show the = in the parenthesis.
5X [1.000](=5.000)
KENAT,
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RE: Use of X by
You are correct that X is uppercase:
5X [1.000].
But, here in the US, [] is usually meant to be the secondary units, () is meant as reference dim's.
Chris
SolidWorks/PDMWorks 08 3.1
AutoCAD 08
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RE: Use of X by
Once that is addressed you might consider using 'EQUALLY SPACED' to indicate the desired locations.
RE: Use of X by
I think that we are only using brackets to denote basic dimensions in this thread.
It should be "X", not "x". All upper case, except for certain abreviations such as mm. And yes, the = should be in parenthesis, because it makes no real sense outside of them. A dimension such as "= 5.00" makes little sense, so you shouldn't see "(5X 1.00)= 5.00" either.
The Edge... there is no honest way to explain it because the only people who really know where it is are the ones who have gone over. - Hunter S. Thompson
RE: Use of X by
KENAT,
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RE: Use of X by
As I pointed out, above, there is an excellent reason why the total value is a reference dimension.
The term EQUALLY SPACED does not appear anywhere in ASME Y14.5M-1994. I think it is clearer and safer to provide an explicit count of features.
JHG
RE: Use of X by
One of the tips on Tec-Ease used 'Equally Spaced" on a basic locating dimension. That is a little 'worrysome' IMHO>
RE: Use of X by
Also EQUALLY SPACED has been flogged to death in previous threads, why bring it up here. Equally spaced is not shown in 14.5 that I'm aware of but arguably may have use for bolt circles. However, its use on linear dimensions as in the OP is more problematic and I believe the approach shown in 14.5 is better.
As to your comment about tec-ease, while I believe their main instructor may be on the 14.5 committee, by himself he is not the standard. If I recall correctly he also pushes use of profile of a surface more than most other committee members/instructors.
KENAT,
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RE: Use of X by
RE: Use of X by
Maybe I am stretching it, but I hate to see Basic dimensions ever referred to parenthetically (in brackets, Ken), even duplicated on aux views on continuation sheets.
To me basic is basic, i.e. no tolerance, so put it in a box.
What say you all?
RE: Use of X by
KENAT,
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RE: Use of X by
KENAT,
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RE: Use of X by
The Edge... there is no honest way to explain it because the only people who really know where it is are the ones who have gone over. - Hunter S. Thompson
RE: Use of X by
Dimension specification...
21X [0.393] (=8.250)
Note that 21×0.393 is 8.253. I wonder about going something like...
[8.250] (= 21X 0.393)
JHG
RE: Use of X by
RE: Use of X by
Thanks. I was confusing [] for brackets, not the basic box.
Been a long week.
Chris
SolidWorks/PDMWorks 08 3.1
AutoCAD 08
ctopher's home (updated Aug 5, 2008)
ctopher's blog
SolidWorks Legion