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Defining Lathe Spindles and Lathe Work Planes siemens NX

You define a lathe spindle in the Machine Tool Builder by classifying a kinematics component as _LATHE_SPINDLE. Every lathe spindle must contain one junction to define a lathe work plane. This is the plane where the tool tip moves during turning operations. Furthermore, the lathe work plane junction defines the rotational axis of the spindle. You do that by assigning one of the following classes to the junction:

  • Lathe Work Plane Z/X — defines the Z-axis as the spindle rotational axis.

  • Lathe Work Plane X/Y — defines the X-axis as the spindle rotational axis.

The system generates a geometry group in the Operation Navigator for every lathe spindle component when the machine is retrieved from the library into the CAM part. Furthermore, a CAM main MCS is created in that geometry group based on the lathe work plane defining junction. All this information is important to the CAM system when generating the tool path. Sometimes, machines have two or more tool carriers (turrets, heads, etc.) that do not work in the same plane. In this case, you can also define a work plane junction in the tool carrier device component. Note that one work plane must be defined in the lathe spindle. The rules are the following:

  1. Define a lathe work plane in every lathe spindle.

  2. If there is a tool carrier that cannot work within that plane, define an additional plane in the tool carrier component.

  3. Either the Z or X axis of the plane-defining junction in the tool carrier has to coincide with the lathe spindle rotational axis.

  4. A work plane must not tilt the lathe centerline.

See the Machine Tool Builder documentation for details about kinematics components, junctions, and their classifications.

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