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Enhanced Variable Radius Edge Blends Through Points

Siemens Enthusiast Siemens Enthusiast
Siemens Enthusiast

Now you have the ability to create variable radius edge blends using explicit points for radius locations and values in NX 11. 

Previously, when you chose to selected an explicit point for variable radius control, the dialog interpreted the point selection as a parametric location along the edge. Thus, even though you selected an actual point, Edge Blend mapped that point to the edge and associated it with a parameter value. The association back to the original point was lost. In order to overcome this, and to maintain association to the point, you had to manually toggle the dialog to be Location:  “Through Point”.

The default in NX 9 is to use “Arc Length”; to use “Through Point” you must manually toggle the Location option.

 NX Variable Radius Points 1.pngDialog from NX 10NX Variable Radius Points 2.pngDialog from NX 10

Now in NX 11, this manual operation has been eliminated. If you choose to select an explicit point for radius control, the dialog automatically switches to “Through Point”. No manual toggle is necessary, and the location remains associative.

Note that if you change the input to be something other than an explicit point, the dialog resets back to “Arc Length”.

NX11 automatically sets Location to “Through Point” when selecting explicit points, and automatically sets Location to “Arc Length” in all other cases.


NX Variable Radius Points 3.pngDialog from NX 11NX Variable Radius Points 4.pngDialog from NX 11

Let’s take a look at a simple variable radius edge blend and see the difference between using “Arc Length” vs. “Through Point”.

The goal here is to have the variable radius blend grow larger as it passes around the “corner”, and then grow smaller as it moves away. In this example, all the variable radius locations are recognized as “Arc Length” locations.

NX Variable Radius Points 5.png

If the corner size is changed to be something smaller, then after update, the variable radius locations remain at their previous Arc Length values:

 NX Variable Radius Points 6.png

We can create the same blend using explicit points to see the difference. The radius control points below were created along the edge, and are associative to the endpoints of the “corner”:

NX Variable Radius Points 7.png

Six points are created in this example: 2 points are associative to the endpoints of the overall edge chain; 2 points are associative to the endpoints of the corner arc; and two more points are created associatively at a distance away from the endpoints of the corner. The point shown above is 25mm away from the endpoint of the corner arc.

If you change the size of the corner arc, the associative points move accordingly:

 NX Variable Radius Points 8.png

A variable radius Edge Blend is created along the edge, using these points as variable radius locations, with the “Through Point” option automatically set each time an explicit point is selected:

NX Variable Radius Points 9.png

Now, because of the blend’s associativity back to the explicit points, and because the points themselves are associative back to the edge and to the corner arc, when the corner arc size changes, the points move and the blend radius locations move as well:

NX Variable Radius Points 10.png

Using explicit points to control variable radius blend locations provides a robust method of maintaining design intent even if the model changes.

MMorse 5/11/17