Custom list of materials

[Anonymous]

When i work with sheet metal parts, i can put the info of sheet metal length and width, and also the weight of the part but i need to put the weight of the part as if it was without holes or negative cuts, the weight of the piece as as a brute part to know how much do i need to create the mechanical part. I`ve tried to create an ecuation as an i property but it didnt work out. Any suggestion? 

[johnsonshiue · Accepted solution]

Hi! I believe you can leverage iPart or Derive part. For iPart, you will need to create two members: original vs suppressed holes. Or, you can derive the part into another part. Use Delete Face -> Heal to remove the cutouts. Regardless, you will need two ipt files here.

We are working on a project allowing you to store multiple geometric definitions within one ipt file. It is available for testing on Inventor Feedback Community (https://autode.sk/InventorBeta).

Many thanks!

[Cadmanto · Accepted solution]

@Anonymous 

I think this thread speaks to what you are looking for using iLogic.

https://forums.autodesk.com/t5/inventor-customization/sheet-metal-blank-weight-formula/td-p/6700809 

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[Anonymous]

Hi. I still dont figure it out. I dont know how to insert as a custom paramter the ones from sheet metal length/width, to then manage to create the formula, also as a custom parameter, of sheet metal length*sheet metal width* gauge* any factor, which will dive me the result of the brute sheet metal weight. Supressing holes i understand that allows me to see weight of the piece, but it doesnt take into account the flanges. 

In the image you can see on the parts list that i have the dimensions and the wight considering the holes and the negative cuts, but i want whe weight creating an ecuation as the one shown  below the drawing. and to insert the result on the parts list.

[johnsonshiue]

Hi Diego,

I believe it should be doable. Please share the files here so forum experts can take a look.

Many thanks!

[Anonymous]

I attached an image were in iproperties i can see and use the parameters cause you tipe them as function and appears, the ones of sheet metal. Then in parameters i know i could put an ecuation as a custom parameter to then export the result to the parts list template, but i have written sheet metal length per say but it doesnt recognize it so i cant create the ecuation. The ecuation i want to achieve is: <SHEET METAL LENGTH>*<SHEET METAL WIDTH>* <THICKNESS>* "SPECIFIC WEIGHT OF THE MATERIAL"/1000000.

[johnsonshiue]

Hi Diego,

I see what you are trying to do now. The issue here is that the property equation only works for text-based expressions. You can add numerical values but they are not evaluated like math equations. The values are taken as text.

I believe you will need iLogic to do what you are looking for. Basically, you can create a text or number iProperty. The in the rule, you simply write the math equations to calculate the values. Then assign the values to iProperties.

Please share an example here. It is fairly easy to do. With an example, you will understand it more clearly.

Many thanks!

[Anonymous]

Ive got as iproperties all the parameters i need to create the ecuation. But i dont know where to create that rule you say. I dont know what do you mean with shearing an example here. 

Thanks, i think we re close to the issue

[johnsonshiue]

Hi Diego,

Please share the ipt file here. It is easier to look at the file than look at an image.

Many thanks!

[Anonymous]

I attached the requested file.

Thanks.

[johnsonshiue · Accepted solution]

Hi! This is indeed doable using iLogic. Please take a look at attached part. I added "Rule0." Basically, it does the mass compute behind the scene using the sheet metal extents and the density. You need to watch out the units. After that, the result is populated to iProperties.

Many thanks!

[Anonymous]

Shiue THANK YOU!!! Thats what y needed to do! 

[Cadmanto]

@johnsonshiue 

Just curious,  What is the difference between what you did with iLogic versus what was done in the link I provided?

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[johnsonshiue]

Hi Scott,

Indeed, my solution was very similar to the post you referred to. I am marking your reply as a solution. BTW, I never mark my own reply as a solution.

The reason why I asked Diego for an example is that he seems new to iLogic. Without an example, it is a bit hard to explain how to do it. He created a text parameter and tried to combine numerical values of sheet metal extents, thickness, and density in a math equation. Parameters table does not support such conversion. The way he did it would not yield any meaningful result. This is why I used his attached part and provided a solution.

Many thanks!

[Anonymous]

Im new to ilogic ^_^

[Cadmanto]

Hi Johnson,

Thank you for the explanation.  Like I said I was curious from a learning perspective.

I am not a guru with ilogic either, so when I found that link, it seemed to be very similar to what the OP was looking for.

I am glad it could help.  That's why you and I are on these forums, to help those that don't know what we know!!! 😉

Windows 10 x64 -16GB Ram
Intel i7-6700 @ 3.41ghz
nVidia GTS 250 - 1 GB
Inventor Pro 2021

[Anonymous]

I have an issue again. When i change the material of the piece it doesnt change the density from the ecuation, if i change the thickness or dimensions it recognizes those changes but not the density. I found that i think it is taking density from users parameters but when i go there, it is not showing anything. What am i doing wrong?

[johnsonshiue · Accepted solution]

Hi! Diego,

It is because the density you used is a parameter, unassociated with the material style. If you want, you can simply find the density by replacing the parameter with the following expression.

iProperties.Mass/iProperties.Volume

Many thanks!

[Anonymous]

Hi! I return to you to ask you a question about the issue i had creating rules.

I tried to create the rule you gave on an other template but it didnt work out. 

i think its because the iproperties i made or the custom parameters.

i attach the template i made. 

Cheers.

[Anonymous]

I found the solution, thanks.