Centre of Gravity on an assembly

[jonesc]

Hi all,

I'm trying to create a CSO or point at the COG of my tool assembly (not
using tool design module).

In the mass properties dialog in the feature tab, the datum check boxes
are greyed out and I can't find out how to enable?



Can someone please point me in the correct direction





Regards

Craig Lobban-Jones



craigl@hitechtooling.com.au



+61 7 3711 9855




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[rrich]

I think you need to have the advanced assembly extension to be able to use
that. Here is how you can do it without.



Do a mass prop analysis - on analysis tab select feature from lower left
pull down menu - click eye glasses for preview - click on feature tab at top
- scroll down parameter window and click check boxes for XCOG, YCOG, ZCOG -
click green check mark . You now have a MASS_PROP_XXX in your model tree
as a feature to your assembly.



Next create a CSYS in your assembly relative to the assembly_csys used for
mass prop calculations just put it at a nominal distance from other csys
like 20, 20, 20



Now you need to write a relation to move that newly created csys. Click
Tools menu - select relations option - now you choose the pull down for
feature and select your newly created csys. your relations will look
similar to this but d4:1 and other dimensions might be different as your
assembly may have other dimensions or multiple assemblies in it.

[jellis]

Hi Craig. Which release of Wildfire are you using? Ron's suggestion is very good and particularly the part of putting the feature in the footer so it always regens last.

In WF4 you can create the feature through the Analysis menu. Analysis--->Model--->Mass Properties will yield the Mass Prop dialog box.

At the bottom, change Quick to Feature--->Click Eyeglass icon for Preview--->Click Feature tab--->Select desired Params & Dtms--->Green check icon to complete.

In the Model Tree--->RightMouse to Rename the feature and Move to Footer. This method doesn't require any relations.

Regards,

Jim