Using Multibody Parts In NC Assemblies
Multibody parts are supported in NC assemblies. You can assemble reference models with multibody parts in NC assemblies. You can assemble a multibody part with the 
Merge Reference Model or the 
Inherit Reference Model options. However, the part will show only one body after you inherit or merge it. In this process, no data is lost as the multiple bodies are converted into one body.
Merge Reference Model or the Inherit Reference Model options. However, the part will show only one body after you inherit or merge it. In this process, no data is lost as the multiple bodies are converted into one body.Consider the following limitations when working with multibody parts:
• Only single body workpiece is supported in Manufacturing.
When a single body workpiece converts to multibody workpiece, a manufacturing feature fails when the feature gets regenerated or when you use 
Edit Definition.
Edit Definition. | • If a manufacturing feature refers to a workpiece or workpiece geometries, it is possible to regenerate the feature using  Regenerate or  Regeneration Manager.• If a manufacturing feature does not refer to a workpiece or workpiece geometries, use  Insert Here on the Model Tree or use the Model Player to force regeneration. |
• Only a single body solid tool or cutting tool adapter is supported in Manufacturing. When a single body tool or cutting tool adapter used in sequences is converted to multibody, the related sequence fails when the feature gets regenerated or when you use Edit Definition.
Edit Definition.| | To force regeneration, use Insert Here on the Model Tree or use the Model Player. |
• When working with construction bodies, consider the following information:
◦ Construction bodies are considered as non-existent and are ignored in toolpath calculation.
◦ Selection of a construction body using Body in the smart filter is not supported.
◦ Selection of construction body surfaces in any machining step where surfaces are used as machining references is not supported.
◦ Selection of construction body surfaces in any machining step where edges are used as machining references is not supported.
◦ Construction bodies are not considered as Check Surfaces.
◦ Tool collision is not detected with construction bodies.
◦ Construction bodies are not visible and considered in Material Removal Simulation.
◦ Regeneration is not triggered automatically when a body is set or unset as construction body. To consider or ignore the construction body, NC features referring to the construction body must be redefined or require forced regeneration.
◦ If you define one or more bodies as construction bodies, an existing mill volume, mill window, or turn profile created using all bodies or a multibody reference part is regenerated automatically. To force regeneration, use Edit Definition. Alternatively, you can use Insert Here on the Model Tree or use the Model Player to force regeneration.
Edit Definition. Alternatively, you can use Insert Here on the Model Tree or use the Model Player to force regeneration.• Selection of surfaces across multiple bodies is not supported.
• Selection of edges across multiple bodies in the form of containment or closed loop is not supported.
• When a part is selected in the rotary rough and rotary finish sequences, the axial and radial limits do not change due to construction bodies. The limits are calculated based on the outermost surfaces. These surfaces may include construction body surfaces.
• The following limitations apply for a Turn Profile:
◦ Creation of a Turn Profile by using 
Surface is possible on surfaces from a single body only.
Surface is possible on surfaces from a single body only.◦ When creating a Turn Profile using 
Cross Section, consider the following:
Cross Section, consider the following:▪ Creation of a Turn Profile on cross section is possible from a single reference body or a single reference part.
▪ If you select a multibody reference part, the Turn Profile is created on a body that has the highest radii.
▪ If you select a single body, the Turn profile is directly created on the selected body.
▪ If you select multiple bodies, the Turn Profile is not created.
◦ Creation of a Turn Profile by using 
Chain is possible on curves or edges from a single reference body only.
Chain is possible on curves or edges from a single reference body only.• You can select either a part or a single body as a reference for the rotary rough, rotary finish, auto deburring, and undercut machining HSM sequences.
• You can select only a single body workpiece model for the stock boundary feature.
• You can select either a single part or a single body while trimming the mill volume.
• The holemaking sequences support part selection only. Selection of a body is not supported.