Physical Materials - density not accurate enough

[evilc]

The density field for Physical Materials only allows values to 3 decimal places - I need 4

Carbon Fibre for example, for me at least, is 0.0015 g/mm3

eg for a part I have had cut from a design in Fusion that actually weighs 1.65g, 0.001 yields a weight of 1.094g and 0.002 yields a weight of 2.187g - a ~50% difference in weight, which is unacceptable

Please fix

[g-andresen · Accepted solution]

Hi,

If necessary you can change the settings in your preferences:

günther

[TheCADWhisperer]

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

[evilc]

This is pointless - you don't need my design to repro this issue, it repros with all designs

I am asking why the "Density" field here only accepts values to 3 decimal places, I need at least 4

The "Scientific notation precision" setting mentioned above has no effect on this dialog

[TheCADWhisperer]

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@evilc wrote:

This is pointless - you don't need my design to repro this issue, 

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Interesting you should write that.

In my FEA class we create our own custom library of materials and enter any values that we need.

If you had given me your file - I would have used it in an example video.

Good luck with your Fusion 360 endeavors!

[evilc]

Can you show me a screenshot of that dialog with 0.1234 g/mm^3 in it?

[TheCADWhisperer]

or...

[evilc]

Hmm, interesting

Sample project attached, but surely this is an application-wide setting?

[evilc]

No idea why I cannot get that box to show that many decimal places, but I figured out how to add a material with the correct density by using the full material library.

All I did before was open that dialog, duplicate Steel (What I guess is the default material for all bodies), rename it and try and type my value into that dialog

As soon as I worked out how to use the full materials library, was able to create a new material with the correct density, although it still rounds to 3DP in that dialog, the Mass is correct

[TheCADWhisperer]

Click on the Advanced.

[aeytwp]

I have exactly the same problem and a search bring me to this post.

The density in my material setting box only limit to 3 decimals.   Can you please elaborate on how did you solve this problem? How to add a new material (not duplicate) the full material library?

[TheCADWhisperer]

@aeytwp 

Can you Attach your *.f3d file here?

Can you Attach some screenshots of what you see?

[aeytwp]

Please see my screen cast. 

https://autode.sk/3Is0RTr

I put in more than 3 decimals, but it rounds to 3 decimals.  Please advice.

[aeytwp]

This screencast is my unit setting, https://autode.sk/3L0gxPl

Please advice how to make the density setting accepts more than 3 decimal points.