Numbering and Revising Multisheet Drawings Question 2

[DraftingSuper]

There is a difference of opinion in our company regarding the numbering and revising of multisheet drawings. The current company standard is to put Sheet 1 of X on the first sheet and then number the following sheets as Sheet 2, Sheet 3, etc. If one or more sheets of a multisheet drawing are revised, only the revised sheets are "reved up", not all sheets.

Our company acquired an electronic controls manufacturer who wants the drawings to have the Sheet X of X on every sheet and when any sheet within the multisheet drawing is revised, they want all sheets to be "reved up" to the same rev level which they say is an "industry standard".

Does anyone have some input on this? My background is mechanical and I am not familiar with the electronic controls industry.

 

[ewh]

Ask them which standard they are referring to.
I have seen revisions done both ways, though very rarely see separate revisions on drawing sheets. A drawing is usually considered "one" item, with every sheet reflecting the revision level of the entirety. This is also often driven by the CAD package and PLM (if any) systems used.
As to the "SH X of X" on every sheet issue, I have also seen that done both ways. If memory serves, it was DOD-STD-100 that drove having the total only on the first sheet method, but I rarely see it used today.

"Good to know you got shoes to wear when you find the floor." - [small]Robert Hunter[/small]

 

[PeterStock]

I have seen it both ways, I do not know if there is a "industry standard" for what is used. Ask them for a reference to a standard. In any case company standards trump industry standards for the most part.

Both of our clients use the following:

Sheet 1 has "SHEET 1 OF X" where "X" is the number of sheets. There is a block on the sheet with all the sheet numbers and their revisions shown (called "REVISION STATUS OF SHEETS"). Sheet 1 allways gets revised if only to state "REV STATUS OF SHEET 2 AND 4 CHANGED".

All other sheets just state their sheet number. They are revised only if there is a change to that sheet.

Your practice is probably similar.

Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services

http://www.infotechpr.net

 

[PeterStock]

ASME Y14.35M-1997- REVISION OF ENGINEERING DRAWINGS AND ASSOCIATED DOCUMENTS is the standard for drawing revisions. Both methods are shown.

Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services

http://www.infotechpr.net

 

[ewh]

There you go!
Now, about those sheet numbers...
;-)

"Good to know you got shoes to wear when you find the floor." - [small]Robert Hunter[/small]

 

[KENAT]

The first method you currently do was mandated by govt in the UK for govt contracts - or at least the ones I worked on. This also had a 'drawing list' for each major assy/sell-able item or the like which listed the revs of the drawings & if appropriate the rev of sheets of the drawing.

How well some CAD/PDM/ERP or similar systems can manage this is another matter.

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[fcsuper]

Revising each sheet separately doesn't make as much sense these days as it used to for many industries, though I can see where it would be useful for some. It used to be easier to just revise one sheet back in the pencil and board days. Nowadays with CAD and custom properties and Product Data/Lifecycle Management applications, it seems like it would be easier to maintain one rev for all sheets. If separate revisions are necessary, then perhaps there needs to be separate drawings (assuming that we are talking about assemblies)?

Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion

http://groups.yahoo.com/group/solidworks & http://twitter.com/fcsuper

 

[CorBlimeyLimey]

"...which they say is an "industry standard"."
Note the "an" ... not "the". It is one of several 'industry standards'.

Who acquired who? Usually the acquirer tells the acquired how things will be.

"Resistance is futile, you will be assimilated, you will comply"

 

[ewh]

My thoughts also, CBL. Hopefully the acquirer will keep the best and forget the rest.

"Good to know you got shoes to wear when you find the floor." - [small]Robert Hunter[/small]

 

[ctopher]

Also check out "ASME Y14.1 Decimal Inch Drawing Sheet Size and Format". I think Sheet 1 of X is acceptable, I prefer it.

ALso "ASME_Y14.35M_Revision of Eng Dwgs and Associated Documents".

Chris
SolidWorks 09 SP5.0
ctopher's home
SolidWorks Legion

 

[dgallup]

Having multiple rev levels on different sheets is a hopelessly complicated system. I'm not surprised the UK government specifies this, was that part of the Department of Redundancy Department?

We put sheet N of X on every sheet and all sheets have one rev level. That way, if you only have one sheet you can find the complete drawing package.

The other way may be acceptable, it doesn't make it smart.

 

[KENAT]

The UK govt system specified it in part because a lot of the drawings were not on CAD but hard copy drawings where it's a much better system than having to needlessly revise sheet after sheet of drawings with no changes.

Nothing hopelessly complicated about it in the right application.

Like wise only having sheet no. and not sheet "x of y" also makes a lot of sense for hard copy drawings.

(Oh, and before you make a smart comment about the UK still being on hard-copy - so were many of the American drawings I dealt with in that job.)

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[btrueblood]

I've seen and used both methods. A star to Peter for the ref.

 

[looslib]

My last company did the individual sheet revision thing. In an AutoCad environment where we had one file per sheet, that made sense. But in Pro/E with all sheets in one file, the still did it. When we put in PDMLink, I said no, the whole file is revised, so all sheets are revised. It took some work,but they did eventually agree.


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Ben Loosli

 

[ctopher]

I just realized I added the same spec as Peter. Sorry Peter.

Chris
SolidWorks 09 SP5.0
ctopher's home
SolidWorks Legion

 

[MechEng2005]

A little off-topic, but still within view of the path being traveled...

In the case where all sheets of a drawing are kept at the same revision number/letter, does the revision note get written out completely on all the drawings?

Say I have a drawing consisting of 4 sheets, and in one view on sheet 2 somebody typed in a dimension incorrectly. So on sheet 2 I put a revision stating "Dimension was 3.155, now 3.511" or something. Would I put that same revision note on pages 1, 3, and 4? Or on those sheets, would I just update the number without any indication of what was changed? Or on the non-affected sheets, would I make the revision note say "Revision to sheet 2".

In some programs where all the sheets are tied to a single file, it may be easiest to have all the sheets have the complete revision note in the title block. However, we are using AutoCad, so each sheet is a different file and the updates need to occur independently.

Another thought, maybe I'm wrong altogether here... Do people normally have a "revision table" with the note explaining what was revised on EVERY sheet, or is a different sheet format used that only has the location for revision notes on the top sheet? I think that would probably make the most sense if all sheets in the drawing are kept at the same revision number/letter.

Anybody care to clarify how they do or have seen this method applied?

-- MechEng2005

 

[fcsuper]

For the case where all sheets are one rev, only one table is necessary. It can be on a cover sheet or just 1 of X. In the description column, just put a full detail of where the chg happens like "Sheet 2: .25 was .30". If you are using a zone column in your rev block, that's all you'd need.

Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion

http://groups.yahoo.com/group/solidworks & http://twitter.com/fcsuper

 

[fcsuper]

To follow up on the zone column...it's fairly common to place the sheet number with the zone in that column.

Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion

http://groups.yahoo.com/group/solidworks & http://twitter.com/fcsuper

 

[btrueblood]

What FCsuper said is not uncommon. But often I find I didn't leave room on my first sheet for a humoungous revision table, and will abbreviate unaffected sheets with verbage along the lines of "see sheet 2 and 3", etc. We also have started placing "delta" symbols alongside changed dimensions and callouts to help clarify (or confuse) things.

 

[ewh]

To simplify even more, on sheets other than the first state "SEE SH 1" in the revision block; on sheet one state "SEE ECN XXXXX" (or equivalent). We have used this method for years without any problems. If details of the change are required, the ECN is then referenced.

"Good to know you got shoes to wear when you find the floor." - [small]Robert Hunter[/small]