REVISION SYMBOLS
REVISION SYMBOLS
(OP)
http://www.eng-tips.com/viewthread.cfm?qid=251821
This old thread has been closed, unfortunately, but I wanted to put something out there for you all...
I've never had much experience with that whole "level I, II, and III" stuff, but revision symbols I am quite familiar with. Simply put, they are a symbolic reference to the specific items in the drawing view which correspond with the revision table. For example, if your "Rev C" notes in your revision table say "3.50 was 4.00," you'd place a symbol with the letter "C" inside it next to that specific dimension.
I have also found that the generally accepted symbol to use is a triangle. I don't know if that's just a SolidWorks default and nobody's bothered to change it, and some shops don't know what it is until you tell them... but it's what I've been using for years now.
Anyway, someone please let me know if you find a standard which tells you specifically what kind of symbol to use, etc.
Thanks!
This old thread has been closed, unfortunately, but I wanted to put something out there for you all...
I've never had much experience with that whole "level I, II, and III" stuff, but revision symbols I am quite familiar with. Simply put, they are a symbolic reference to the specific items in the drawing view which correspond with the revision table. For example, if your "Rev C" notes in your revision table say "3.50 was 4.00," you'd place a symbol with the letter "C" inside it next to that specific dimension.
I have also found that the generally accepted symbol to use is a triangle. I don't know if that's just a SolidWorks default and nobody's bothered to change it, and some shops don't know what it is until you tell them... but it's what I've been using for years now.
Anyway, someone please let me know if you find a standard which tells you specifically what kind of symbol to use, etc.
Thanks!





RE: REVISION SYMBOLS
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RE: REVISION SYMBOLS
RE: REVISION SYMBOLS
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RE: REVISION SYMBOLS
Chris
SolidWorks 09 SP5.0
ctopher's home
SolidWorks Legion
RE: REVISION SYMBOLS
RE: REVISION SYMBOLS
So the triangle, means Delta, means change.
I've never actually used them, seemed like a lot extra effort and potential to be introduce mistakes at the next ref etc. My preference is to list the sheet & grid size where ever I'm detailing what the change was be it rev block or ECO or whatever you call it.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: REVISION SYMBOLS
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
&
RE: REVISION SYMBOLS
Thanks for the info. You say that the only shape mentioned is the circle... Is the circle specified, or is it only used as an example?
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: REVISION SYMBOLS
"The revision symbol may be used to identify an item or area of change on the drawing. The symbol should be placed at or near the location affected by the change."
"When a revision symbol is used, the revision letter, and the sequence number when used, shall be enclosed in a circle to form a revision symbol."
"On drawings where use of revision symbols may conflict with other symbols used on the drawing creating a possible misinterpretation, the revision description will be adequate."
There's more, but that's the pertinent wording. I would say that I do see room for improvement on this section, as I do not see why one needs to be limited to using a circle or nothing at all.
In my opinion, if you do wish to use another symbol, you can. Simply define that symbol directly on your drawing (perhaps in the title block). Any exceptions to the ASME standards should always be clearly explained on the drawing or at least in some referenced document that is provided along with the drawing.
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
&
RE: REVISION SYMBOLS
Thanks! That's very helpful, and it explains why we don't use revision symbols here as our standard. We use circles to denote item numbers, so I assume long ago we did away with revision symbols and left the description as adequate revision communication.
But, I don't think we'll be fined for using triangles if we really wanted to. lol
Thanks!
RE: REVISION SYMBOLS
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: REVISION SYMBOLS
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: REVISION SYMBOLS
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
&
RE: REVISION SYMBOLS
Dear Committee Members,
I have a request for a change to Revision of Engineering Drawings and Associated Documents ASME Y14.35M-1997 that may improve the flexibility of the standard.
For Paragraph 5.4, I would like to ask for the inclusion of other shapes for revision symbols (particularly, I request: delta, hexagon, and box). I would also like to suggest that the wording of this paragraph be simplified for clarity, as follows (comments in brackets[]):
5.4 Revision Symbol
The revision symbol may be used to identify an item or area of change on the drawing. The symbol should be placed at or near the location affected by the change. A single revision symbol may be used to identify multiple changes within one area. See Fig 5.1 [same figure currently called Fig 5].
5.4.1 Symbol Application
Where a revision symbol is used, the revision letter, and the sequence number when used, shall be enclosed in a circle, triangle, square or hexagon. See Fig 5.2 [a new figure that shows all the symbols]. One or more leaders may be used to indicate a specific location. See Fig. 5.1 (a), (b), (c) and (d) [same figure currently called Fig 5].
5.4.2 Omitting Symbols
[Remove this section for three reasons. First, the use of revision symbols is not a requirement. Second, with the inclusion of more symbol shapes, the conflict condition isn't likely. Third, the reliance on the revision description is self-evidence when taken in context of the Y14.35 standard on the whole.]
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
&
RE: REVISION SYMBOLS
I am encouraged. I will submit that same request.
-brad
RE: REVISION SYMBOLS
Common on certain defense companies drawings - especially Hughes as I understand it.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: REVISION SYMBOLS
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: REVISION SYMBOLS
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
&
RE: REVISION SYMBOLS
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
&
RE: REVISION SYMBOLS
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: REVISION SYMBOLS
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: REVISION SYMBOLS
Fcsupers proposed change opens it to more options.
I'm just saying there should be a clear mandate that the rev symbol should be unique. A big enough difference in size might be OK, but it would need to be very noticeable.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: REVISION SYMBOLS
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
&