Adding an Offset Between Parts
The Add Offset command is available when the Stackup table is open and showing the details of one of the Stackups.
Although it is assumed that the assembly constraint features selected between parts during the Stackup loop definition are coincident, you can add distance or offset between the parts with an associated tolerance.
Use the Add Offset command to control the distance between parts during assembly such as the gear on a motor shaft, or to add the thickness of a coating operation to one or both parts if the coating is not included in the model. In rare scenarios, you can specify a negative value for the offset that results in surface of one part extending into the surface of the other part.
To add an offset, follow these steps:
1. Click > . The Add Offset Dimension dialog box opens. All assembly constraints defined for the current Stackup are in the constraint list.
2. Select a constraint from the Constraints list and click OK. The Stackup Details table shows an offset row between the two parts.
3. In the Stackup Details table, specify the nominal value and tolerance for the distance.
You can remove the offset by clicking 
in the Stackup Details table.
in the Stackup Details table. | You cannot define an offset if one of the features referenced by the assembly constraint is a feature of size such as hole or slot with an associated size dimension. |