why do my item numbers in the drawing change when I replace a part in an assembly? How do I keep this from happening?
In the properties of the BOM select the option indicated in the image below.
I did that and it did not change numbers and reassigned a new number for the item I replaced with a new revision.
is there someway that you can just replace the item number with the new revision.
example my item number is 3, for revision A. I update the assembly with the new revision B. I want the drawing to keep the same item number 3 (do not change any other numbers) for the new revision B.
How are you editing your revised part? If you open your part and save it as a new revision (i.e. name) it should update automatically - that is, you shouldn't need to bring it in again. If for some reason this is not possible (maybe you're revising it in another location) just Save As with the new name from the assembly, then close your assembly and copy the revised part over using Windows Explorer.
this is the steps I take.
1. place all drawing and assembly in new location and bring up in Solidworks
2. edit the assembly, save as new revision
3. open drawing make sure assembly was updated. New assembly gets updated on the BOM, however the drawing has assigned a new item number and placed at the bottom and has changed several other item numbers.
4. So, I redid and this time made sure "DO NOT CHANGE ITEM NUMBER WAS CHECKED" the drawing BOM now has skipped the orginal item number and placed the new revision at the bottom with a new item number. All other item numbers remained the same.
My question is, Is there a way to update a assembly and not have the new revised item change numbers on the BOM?
The short answer is no. I, like most others who look at that check box, assumed it meant "Don't change Item Numbers from what I set up". Unfortunately, what it really means is "don't change Item Numbers from what Solidworks assigns". I have many issues with Solidworks Bills of Material, none of which seem to be a high priority to fix.
The easiest work around I have found for keeping the BOM in the original order I set up is to do a screen shot of it before I start, or have a hard copy of the print handy and drag the items back where I had them when I'm done. They end to stay put, until the next time they change that is.
You can also try using "Follow assembly order", if your assembly was built the way you want the BOM ordered.
Thanks, what if I don't use(or not allow) BOM?
John Tsang wrote: Thanks, what if I don't use(or not allow) BOM?
John Tsang wrote:
I don't understand your question. If you don't have a BOM (Bill of Materials), then you don't have balloon numbers to change. If you're not talking about balloon numbers, then what numbers are changing?
Thanks for the reply Glenn;
Since "do not change item number" function only happen in BOM feature.
What if I created balloon without BOM, but I don't want to change balloon item number in the next revision (even I delete a item in the assembly) what can I do?
It's probably my fault, but I'm still confused. If you create a balloon without a BOM then the balloon won't have a table to reference, so if the balloon type is set to "Item Number" the value will always be 1. If it's set to "Text" then the value you enter shouldn't change unless you or another user manually edits it.
Thanks for the explanation, I just didn't explain very good. My bad.
Yes if I set to item number, the first parts will always be 1. However, if I revise the assembly and deleted a part (for example item 2 ), item 3 will auto generate to 2. My question is how can I avoid it? (beside text in the item number).
Thank you very much
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