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Using Turning Reference Models

It is important to understand how reference models are used in manufacturing assemblies.
Reference models represent the finished machined component. For example, this can be:
• A component machined from solid.
• A machined casting.
Creating reference model options:
• Same Model
• Inherited
• Merged by Reference
Reference Models

Using Turning Reference Models

Figure 1 – Reference Model Example
Reference models, often referred to as design models, represent the finished machined component. Model geometry, such as surfaces and edges, is selected from the reference model and is used as references when creating NC sequences. If the reference model changes, then all associated machining toolpaths are updated to reflect the changes. The reference model can be a part or assembly and can take many forms, for example:
• A component machined from solid. In this case, it is likely all component geometry would be machined.
• A machined casting. Normally only certain surfaces on the casting would be machined. In addition, holes would be drilled, bored, or tapped as required.
Creating Reference Model Options
You can assemble reference models using the reference model tool. There are three options available when assembling your reference model.
• Same Model
– In this case, the selected model is used directly as the reference model, and no new parts are created.
• Inherited
– In this case, a new reference part is created. The reference part inherits all geometry and feature information from the original design part. You can specify the geometry and the feature data that you want to modify on the inherited part without changing the original part. Inheritance provides greater freedom to modify the reference part without changing the design part.
• Merged by Reference
– In this case, a new reference part is created. The new reference part contains an external merge feature; this feature contains all geometry
and datum features which have been copied from the original design part. All layer information is also copied into the new reference part.
If an assembly is selected as the reference model, then the assembly is used directly as the reference model, and there is no option to use the Inherited or Merge by Reference options.

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