Parts Only View export problems

[Anonymous]

Inventor 2012

I have a large assembly (20,000+ parts) which consists of many layers of assemblies and fabricated, machined and purchased parts.  When I generate the top level Parts Only BOM I expect to end up with the list of items I need to purchase in order to assemble the final product.  However, the list that is generated includes the "purchased" parts that are part of "purchased" assemblies.  This is consistent with the knowledge article below, but can anyone help me understand why it works this way, and how to get a final list of the parts and assemblies I need to actually purchase.

See paragraph 3 of "Parts Only View"

https://knowledge.autodesk.com/support/inventor-products/learn-explore/caas/CloudHelp/cloudhelp/2016...

As a simple example, I have an air filter assembly which is purchased from a vendor.  It contains a canister (BOM property Normal), filter (BOM Purchased), barbed fitting (BOM Purchased), bracket (BOM Normal), and several pieces of Content Center hardware (BOM Purchased).  My final Parts Only BOM contains:

Air Filter Assembly Qty=1

Filter  Qty=1

Barbed Fitting Qty=1

Hex Screw Qty=4 more than I need

Washer Qty=4 more than I need

Nut Qty=4 more than I need

But since I already buy the assembly, I do not need to purchase the filter, barbed fitting, or the hardware separately.  I could change the BOM property of the filter and barbed fitting to Normal, but that doesn't make logical sense, and the hardware is in the Content Center, so I cannot modify the property.

If this were just one small assembly, I could go through each line manually and determine what was not needed, but with such a large assembly it becomes nearly impossible to try to decrement the top level number of pieces of hardware that have been promoted, vs the quantity that needs to be purchased.

Is there something I'm missing?  Is the Parts Only BOM not the correct method of obtaining my final list of items to go purchase?

Thanks,

Dan

[mcgyvr]

The components of the purchased assembly should just be marked as normal as they aren't purchased.. Only the assembly is..

Then they will not show up in the parts only export..

[Anonymous]

I seem to get an error every time I try to change a content center part's BOM structure.  For other parts I could change their BOM structure to Normal, but it seems counterintuitive since they are clearly purchased items (filters, bearings, cylinders, dampeners, etc).

Is there a different/better way to get only the necessary data into our purchasing system?

Thanks,
Dan

[mcgyvr]

by default CC parts are Purchased..

You can create custom CC parts. 

I don't use CC so I'm not burdened with that whole silly system.. So there may be other tricks I'm not aware of..

But in the end parts inside a purchased kit need to be set to normal. 

I'd just make the CC part a normal one (not in the CC) then just change its bom structure to normal.. 

[Anonymous]

Not using CC would be nice, but it's what we do.  I will go ahead and change all the parts I can, and then only the CC parts will be counted incorrectly.  It seems almost like an Inventor bug that has now been labeled added functionality.

Thanks for the help,

Dan

[mcgyvr]

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@Anonymous wrote:

  It seems almost like an Inventor bug that has now been labeled added functionality.

Thanks for the help,

Dan

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Its 100% as intended.. CC is intended to give users a library of "commonly purchased parts" that people use in their products..

So naturally they are marked as purchased..

Its just something you weren't aware of until now.. 

[Anonymous]

What I think is the bug is NOT that they are "Purchased" in the BOM structure, but rather that a "Purchased" screw used on a "Purchased" assembly rolls up to the top level on the Parts Only BOM.  I fully understand why the CC parts are "Purchased".  In fact, the other parts on my assemblies should be marked as "Purchased" but I need to go counter to all logic in order to not have them ordered twice (once in the assembly, and once for the top level).

[mcgyvr]

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@Anonymous wrote:

What I think is the bug is NOT that they are "Purchased" in the BOM structure, but rather that a "Purchased" screw used on a "Purchased" assembly rolls up to the top level on the Parts Only BOM.  

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Gotcha... And yes I agree 

@johnsonshiue  Johnson is this a bug? or just a "limitation"

Should a part market as purchased show up in a parts only BOM if its a component of a purchased subassembly?

I agree with johnsda4 that it shouldn't but there may be a reason we aren't thinking about.. Sure makes using CC parts in purchased subs a pain

[johnsonshiue]

Hi! The behavior does not sound right to me. But, I cannot seem to reproduce it on my machine. Could you provide an example showing such behavior (post it here or send it to me directly johnson.shiue@autodesk.com)?

Many thanks!

[mcgyvr]

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@johnsonshiue wrote:

Hi! The behavior does not sound right to me. But, I cannot seem to reproduce it on my machine. Could you provide an example showing such behavior (post it here or send it to me directly johnson.shiue@autodesk.com)?

Many thanks!

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I can't reproduce it either (just tried in Inv 2016).. I took the OP's word for it before trying.. oops..

I just noticed he stated Inventor 2012 though so that may be their issue..

@Anonymous Have you updated your version of Inventor with all updates/service packs?

It seems its either a bug in your old software  or something specific to your assembly.

Inventor works as you/I think it should now.. purchased components of a purchased sub do not show in a parts only bom..

[Mark.Lancaster]

Wondering if the sub-assembly has a BOM structure of Phantom and not purchase.. 

[Mark.Lancaster]

If it was me..  I wouldn't be managing a purchased assembly as an assembly in my model.  I would convert it to a single part...

[Anonymous]

My mistake.  I thought it was happening for Inseparable AND Purchased assemblies, but you are correct.  It is happening only for Inseparable assemblies.  This is most problematic for parallel pins welded into a weldment or pressed into a machined part.  The pin is "Purchased" and the assembly is "Inseparable" so the top level BOM contains parallel pins that are not needed because the machine shop installs them when the make the weldment.

Thanks,

Dan

[Mark.Lancaster · Accepted solution]

Here's some reference informaiton http://synergiscadblog.com/2015/02/06/inventor-bill-of-materials-structures/ that details out the Inventor BOM struictures and what happens under each condition..

[Anonymous]

My mistake.  I thought it was happening for Inseparable AND Purchased assemblies, but you are correct.  It is happening only for Inseparable assemblies.  This is most problematic for parallel pins welded into a weldment or pressed into a machined part.  The pin is "Purchased" and the assembly is "Inseparable" so the top level BOM contains parallel pins that are not needed because the machine shop installs them when the make the weldment.

I agree that we need to upgrade to newer inventor, but our primary customer uses 2012, so we cannot.

Thanks,

Dan

[Anonymous]

Thanks.  Even though I understand how it works, I don't think it's appropriate to change the BOM structure of a weldment from Inseparable to Purchased in order to not roll up the purchased parallel pins, weld nuts, and cage nuts to the top level Parts Only BOM.