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How to read mass? [fixed]

Engr62

Member
@Max, will the mass fix be installed with the v22 update if I allow Alibre Design to update when I start up? (I've been having it "remind me tomorrow" until the mass fix was made). Thanks!
 

beastro

Senior Member
Possibly a 'Format' selection and 'Number of decimal places' on the Physical Properties dialog which is saved between sessions would be truly magical! :)

+1. I personally prefer scientific notation, but I can see why it might be counterintuitive as well.
 

simonb65

Alibre Super User
@Max, will the mass fix be installed with the v22 update if I allow Alibre Design to update when I start up? (I've been having it "remind me tomorrow" until the mass fix was made). Thanks!
The mass fix is in build 22053, which is available now if you just let it update at start up.
 

NateLiquidGravity

Alibre Super User
Please Max, can you post a copy of that assembly? :p:D
I'm not Max but here is one of mine. The part is completely centered on the origin - but look at the results.

Code:
Design summary
 Parts : 1
 Faces : 6
 Edges : 12
 Vertices : 8
 Unique parts : 1
===========================
Volume = 9E1 in³
Mass = 2.546852942E1 lbm

Center of Mass = [ -9.955841225E-16 in, 2.427855290E-16 in, 0 in ]

Surface Area = 1.260000000E2 in²

Mass moments of inertia =
xx:7.216083337E1 in²·lbm yy:9.550698534E1 in²·lbm zz:1.294650246E2 in²·lbm
yz:2.434405665E-15 in²·lbm zx: 0 xy:4.868811331E-15 in²·lbm

Principal Axes and Moments of inertia =
      7.216083337E1 in²·lbm  {1,  0,  0}
      9.550698534E1 in²·lbm  { 0, 1,  0}
      1.294650246E2 in²·lbm  { 0,  0, 1}


Accuracy:High
 

Attachments

  • New Part (1).AD_PRT
    243.5 KB · Views: 3

sz0k30

Senior Member
View attachment 31875 View attachment 31876

Trying to read the mass of this asm. It doesn't make sense to me? What is 2.68536....E6 in pounds?

A HUGE improvement in V23!!!

Design Summary for 00173

Volume = 752.17 in³
Mass = 24.74 lbm
Surface Area = 4369.53 in²

Center of Mass
[ 21.77 in, .81 in, -.02 in ]

Mass Moments of Inertia
xx: 594.95 in²lbm
yy: 16447.19 in²lbm
zz: 16611.12 in²lbm
yz: 2.75 in²lbm
zx: -6.77 in²lbm
xy: 453.14 in²lbm

Moments of Inertia and Principal Axes
578.45 in²lbm {1, 0, 0}
4725.59 in²lbm {0, 1, .02}
4873.2 in²lbm {0, -.02, 1}

Geometry Summary
Parts : 16
Faces : 1498
Edges : 3878
Vertices : 2426
Unique parts : 16
 

Hunter

Senior Member
Now we just need a CoG symbol in the 3D model that also shows in the 2D drawing environment.
 

JST

Alibre Super User
Now we just need a CoG symbol in the 3D model that also shows in the 2D drawing environment.
And can be measured to! Showing is nice, numbers are better.

IIRC there are a few things that show in drawings but cannot be measured to in V22 and earlier.
 

GIOV

Alibre Super User
Stefan,
Normally the symbol of the cg in the 2D Drawing is this:
upload_2021-6-17_17-46-36.png
 
Last edited:
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