Creating UDFs Using On-Surface Coordinate Systems Theory
The placement of a User-Defined Feature (UDF) gains some capabilities when the features used to create the UDF reference an on-surface coordinate system. Upon placement, the UDF will appear in a dynamic preview that can be dragged to locate the UDF. You can also specify an additional rotation angle for the UDF.
Keep in mind the following regarding the on-surface Csys and UDFs:
- The features comprising the UDF should reference ONLY the on-surface Csys. They should not have any parents other than the on-surface Csys in the model from which the UDF is created. To simplify this, create three orthogonal datum planes through the on-surface Csys to act as a set of "default datum planes."
- If an on-surface Csys is included in the UDF features, the UDF setup will require prompt creation only for the references of the Csys.
- When placing the UDF in this case, you can select references to place the on-surface Csys in the destination model.
- If an on-surface Csys is NOT included in the UDF features, the UDF setup will require the creation of one prompt for the selection of a coordinate system.
- When placing the UDF in this case, you have the option to create an on-surface Csys on-the-fly.
