Mass properties differ in assembly and parts
Mass properties differ in assembly and parts
(OP)
I am using SW 2010 and have come across an issue where I have 2 parts that I have assembled. Separately, the parts weigh 124 and 100 pounds respectively. But when assembled and mated together, they weigh 214 pounds, 9 pounds less than individually. Any thoughts? I am using this to do virtual testing and 9 pounds will make a difference.






RE: Mass properties differ in assembly and parts
RE: Mass properties differ in assembly and parts
RE: Mass properties differ in assembly and parts
I use assembly cuts quite often, but I never experienced errors in mass.
Best regards,
Alex
RE: Mass properties differ in assembly and parts
Gwubs, There are no assembly cuts in either assembly.
RE: Mass properties differ in assembly and parts
I am having an issue with "Save As" command. When I save an assembly model (*.sldasm) together with selective components, SW indicated that I saved them successfully. But equations I have in eithor parts' model or the assembly model do not get updated to file names of the new created assembly and parts.
When I use "Pack n Go", I do not have the issue. Did anyone experience this issue?
Best regards,
Alex
RE: Mass properties differ in assembly and parts
Alex
RE: Mass properties differ in assembly and parts
The reason for asking about "Assigned Mass Properties" is that when you check that box CBL has shown in his picture, you can overide the actual weight of an item or assembly and put in a different weight.
www.phoenixdyno.com
Home of the world's most accurate and repeatable dynamometers, dynamometer accessories, and data acquisition & control software.
RE: Mass properties differ in assembly and parts
I was asking if a mass had been manually assigned to the assy. An assigned mass would override the sum of automatically assigned mass of the component parts. If a manually assigned mass has not been applied at the assy level, that eliminates one reason for the discrepancy.
RE: Mass properties differ in assembly and parts
Could you post your assembly models with components? Discrepanies in mass are not very likely.
Best regards,
Alex
RE: Mass properties differ in assembly and parts
RE: Mass properties differ in assembly and parts
RE: Mass properties differ in assembly and parts
Anna Wood
Xeon W3680, Nvidia Quadro 4000, 12 Gb RAM, WD Velociraptor, Dell U3011 Monitor
SW2011 SP1, Windows 7 x64
http://www.solidmuse.com
http://www.phxswug.com
RE: Mass properties differ in assembly and parts
It is much easier for us to be able to see what is happening rather than make wild guesses.
-handleman, CSWP (The new, easy test)
RE: Mass properties differ in assembly and parts
RE: Mass properties differ in assembly and parts
You could make a custom BOM template for the sole purpose of exporting/using it separately in Excel. Customize the template to include the part densities and weights. In Excel add a sumproduct of the weights * quantities to get the total weight. Some of us are not so adept with API. The BOM tables can be shown in an assembly now, not just the drawings.
- - -Updraft
RE: Mass properties differ in assembly and parts
RE: Mass properties differ in assembly and parts