How to remove the weight of a part without changing part parameters & density from an assembly?

[AC_10506276]

How is it possible to remove from an assembly the weight of a part without changing part parameters and without changing part density? I mean just to remove the part mass from an assembly total mass

[MartinHanak]

Hi,

in https://community.ptc.com/t5/3D-Part-Assembly-Design/Volume-calculation-with-interfering-parts/m-p/879902 discussion you can download my example and see how mass properties feature can be used.

[dgarcia · Accepted solution]

Hello

Yes, you can do it using flexibility:

1. Make the component Flexible if it is not already

2. Add these parameters to Varied Items and give these values:

   PRO_MP_SOURCE: PARAMETERS

   PRO_MP_ALT_AREA: 0

   PRO_MP_ALT_MASS: 0

   PRO_MP_ALT_VOLUME: 0

3. The weight, area and volume of the components will not be included when calculating the mass properties of the assembly

You can select the component and run mapkey com0 to do this:

mapkey com0 ~ Activate `main_dlg_cur` `page_Model_control_btn` 1;\
 ~ Command `ProCmdEditMakeFlexible` ;\
 ~ Select `flexdiffstabdlg` `VarItemsTab` 1 `Parameters`;\
 ~ Open `params_dlg` `ParamsPHLay.OMPrmType`;\
 ~ Close `params_dlg` `ParamsPHLay.OMPrmType`;\
 ~ Select `params_dlg` `ParamsPHLay.OMPrmType` 1 `alternative_mp`;\
 ~ Select `params_dlg` `ParamsPHLay.ParTable` 56 `rowPRO_MP_SOURCE` `name` \
 `rowPRO_MP_SOURCE` `value` `rowPRO_MP_SOURCE` `attribute` `rowPRO_MP_SOURCE` \
 `access` `rowPRO_MP_SOURCE` `source` `rowPRO_MP_SOURCE` `description` \
 `rowPRO_MP_SOURCE` `restricted` `rowPRO_MP_SOURCE` `unit_quantity` \
 `rowPRO_MP_SOURCE` `unit` `rowPRO_MP_ALT_MASS` `name` `rowPRO_MP_ALT_MASS` \
 `value` `rowPRO_MP_ALT_MASS` `attribute` `rowPRO_MP_ALT_MASS` `access` \
 `rowPRO_MP_ALT_MASS` `source` `rowPRO_MP_ALT_MASS` `description` \
 `rowPRO_MP_ALT_MASS` `restricted` `rowPRO_MP_ALT_MASS` `unit_quantity` \
 `rowPRO_MP_ALT_MASS` `unit` `rowPRO_MP_ALT_VOLUME` `name` \
 `rowPRO_MP_ALT_VOLUME` `value` `rowPRO_MP_ALT_VOLUME` `attribute` \
 `rowPRO_MP_ALT_VOLUME` `access` `rowPRO_MP_ALT_VOLUME` `source` \
 `rowPRO_MP_ALT_VOLUME` `description` `rowPRO_MP_ALT_VOLUME` `restricted` \
 `rowPRO_MP_ALT_VOLUME` `unit_quantity` `rowPRO_MP_ALT_VOLUME` `unit` \
 `rowPRO_MP_ALT_AREA` `name`;~ Activate `params_dlg` `PBInsert`;\ 
 ~ Arm `flexdiffstabdlg` `ParamTable` 2 `*ID*1 -2 PRO_MP_SOURCE*TYPE*5*` \
 `NewValue`;\
 ~ Select `flexdiffstabdlg` `ParamTable` 2 `*ID*1 -2 PRO_MP_SOURCE*TYPE*5*` \
 `NewValue`;~ Update `flexdiffstabdlg` `ParamTable_INPUT` `PARAMETERS`;\
 ~ Select `flexdiffstabdlg` `VarItemsTab` 1 `GeomTolerances`;\
 ~ Select `flexdiffstabdlg` `VarItemsTab` 1 `Parameters`;\
 ~ Arm `flexdiffstabdlg` `ParamTable` 2 `*ID*1 -2 \
 PRO_MP_ALT_VOLUME*TYPE*5*` `NewValue`;\
 ~ Select `flexdiffstabdlg` `ParamTable` 2 `*ID*1 -2 PRO_MP_ALT_VOLUME*TYPE*5*` \
 `NewValue`;~ Update `flexdiffstabdlg` `ParamTable_INPUT` `0`;\
 ~ Select `flexdiffstabdlg` `VarItemsTab` 1 `GeomTolerances`;\
 ~ Select `flexdiffstabdlg` `VarItemsTab` 1 `Parameters`;\
 ~ Arm `flexdiffstabdlg` `ParamTable` 2 `*ID*1 -2 \
 PRO_MP_ALT_AREA*TYPE*5*` `NewValue`;\
 ~ Select `flexdiffstabdlg` `ParamTable` 2 `*ID*1 -2 PRO_MP_ALT_AREA*TYPE*5*` \
 `NewValue`;~ Update `flexdiffstabdlg` `ParamTable_INPUT` `0`;\
 ~ Select `flexdiffstabdlg` `VarItemsTab` 1 `GeomTolerances`;\
 ~ Select `flexdiffstabdlg` `VarItemsTab` 1 `Parameters`;\
 ~ Arm `flexdiffstabdlg` `ParamTable` 2 `*ID*1 -2 \
 PRO_MP_ALT_MASS*TYPE*5*` `NewValue`;\
 ~ Select `flexdiffstabdlg` `ParamTable` 2 `*ID*1 -2 PRO_MP_ALT_MASS*TYPE*5*` \
 `NewValue`;~ Update `flexdiffstabdlg` `ParamTable_INPUT` `0`;\
 ~ Select `flexdiffstabdlg` `VarItemsTab` 1 `GeomTolerances`;\
 ~ Select `flexdiffstabdlg` `VarItemsTab` 1 `Parameters`;\
 ~ Activate `flexdiffstabdlg` `OkButton`;\
 ~ Activate `main_dlg_cur` `dashInst0.stdbtn_1`;