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Manual

Manual

7.9.3.10.1.6. Not supported installation situations

7.9.3.10.1.6.1. Function "Generate sketch on selected face" needs at least one edge without Blend

If all adjoining edges of a face have been edited by the Blend feature, the function Generate sketch on selected face cannot be used on this face anymore. This can be recognized by the missing display of coordinate systems.[82]

Example:

All 4 edges edited by Blend feature: "Generate sketch on selected face" is not applicable in this situation

All 4 edges edited by Blend feature: "Generate sketch on selected face" is not applicable in this situation

If at least one "free" edge exists, the function Generate sketch on selected face can be used.

One "free" edge

One "free" edge

If one edge is edited by sketch and the other 3 by Blend feature, the function Generate sketch on selected face can be used.

One edge edited by sketch

One edge edited by sketch

7.9.3.10.1.6.2. Several intersecting chamfers/fillets and Blend feature in addition

[Note] Note

A combination (two or more) of Chamfer/Fillet created by Cut extrusion (by sketch) + Chamfer/Fillet created by the Blend feature (context menu command New Chamfer/Fillet...) may lead to errors and has to be avoided (see following figures).

Of course, you can switch between different ways of creating chamfers/fillets within a model depending on the installation situation. The restriction only applies to directly intersecting edges.

Chamfer/Fillet created by Cut extrude

Chamfer/Fillet created by Cut extrude

In this situation, using the Blend feature is not permitted for an intersecting edge.

In this situation, using the Blend feature is not permitted for an intersecting edge.

Faulty result would be:

Result – View 1

Result – View 1

Result – View 2

Result – View 2

[Note] Note

The combination of one Chamfer/Fillet created by Cut extrude (by sketch) + one Chamfer/Fillet created by the Blend feature (context menu command New Chamfer/Fillet...), would be Ok, whether useful may remain open.

In this example the Blend feature had been applied first, then the Cut extrude.

In this example the Blend feature had been applied first, then the Cut extrude.

7.9.3.10.1.6.3. Edges resulting from Blends

Edges resulting from blends can not be blended.

Message "Edge is a result of another chamfer/fillet"

Message "Edge is a result of another chamfer/fillet"

7.9.3.10.1.6.4. Maximum radius of Chamfer/Fillet
Blend from just one side

If a blend with radius "a" is to be applied to a shoulder height "h", the following applies:

a <= h

The distance of measured planes (shoulder height "h") is 4 mm here.

  1. Initial situation:

    The distance of measured planes (shoulder height "h") is 4 mm here.

    Shoulder height 4 mm

    Shoulder height 4 mm

  2. Selection of desired edge and definition of Chamfer/fillet Radius "a" (here 6 mm)

    Edge selected and radius 6 mm

    Edge selected and radius 6 mm

  3. Result:

    This approach results in errors.

The same applies for chamfers.

Blend from both sides

If two blends with radii "a" and "b" are to be applied to a shoulder height "h", the following applies:

a+b <= h

Otherwise an errors occurs (see following figures).

  1. The distance of measured planes (shoulder height "h") is 4 mm here.

    Shoulder height 4 mm

    Shoulder height 4 mm

  2. Selection of both edges and definition of Chamfer/fillet Radius "a" and "b" (here 3 mm)

  3. This approach results in errors again.

The same applies for chamfers.

7.9.3.10.1.6.5. Blends whose edges meet with different size each

[Note] Note

If intersecting edges shall have different sizes, then this cannot be accomplished by the only use of the Blend feature, but only by a combination of Base extrude (sketch) and Blend.

Example:

  1. The following figure shows that a fillet has already been created by sketch (green marking).

  2. On the 3D model, mark other edges to be rounded (red marking) and in the context menu, call the command New Chamfer/Fillet....

  3. Result:

    In the 3D History, you can see which mode has been used for what.

    Larger fillet created by sketch

    Larger fillet created by sketch

    Smaller fillet created by Blend

    Smaller fillet created by Blend

[Note] Note

Chamfers/fillets, which follow only one axis, should be created by sketch. Chamfers/fillets, which go along at several axes should be created by the Blend feature. The latter ones could not be directly integrated into the sketch by geometrical reasons. An extrude can only model a chamfer/fillet in direction of extrusion.

Valid for fillets and chamfers.

7.9.3.10.1.6.6. Combination of a fillet and a chamfer

[Note] Note

If intersecting edges shall be a combination of fillet and chamfer, then this cannot be accomplished by the only use of the Blend feature, but only by a combination of Basis Extrusion (sketch) and Blend.

Example:

  1. The following figure shows that chamfers have already been created by sketch (green marking).

  2. Now perform a face selection in order for the adjoining edges to be rounded. Then in the context menu, call the command New Chamfer/Fillet....

  3. Result:

    In the 3D History, you can see, which mode had been used for what.

    Chamfers created by sketch

    Chamfers created by sketch

    Fillets created by Blend

    Fillets created by Blend

[Note] Note

Chamfers/fillets, which follow only one axis, should be created by sketch. Chamfers/fillets, which go along at several axes should be created by the Blend feature. The latter ones could not be directly integrated into the sketch by geometrical reasons. An extrude can only model a chamfer/fillet in direction of extrusion.

7.9.3.10.1.6.7. Radius of chamfer/fillet larger than distance to adjoining geometry

If the radius of chamfer/fillet is larger than the distance to an adjoining geometry, material will be removed from the adjoining geometry. This behavior applies for chamfers and fillets in the same way.

[Note] Note

This use case is very rare, so it should be no problem for regular parts.

Example:

  1. On the edge marked in red, a fillet is created by the Blend feature.

    PARTdesigner: Creation of fillet on marked edge

    PARTdesigner: Creation of fillet on marked edge

  2. Since the radius of the fillet is larger than the distance to the overlying geometry, the fillet hollows out this element.

    PARTdesigner: Result

    PARTdesigner: Result

[Note] Note

Changing the length of extrusion does not affect the behavior, (since the Blend feature has priority and the material is removed anyhow).

PARTdesigner: Extrusion extended downward

PARTdesigner: Extrusion extended downward

The behavior of the CAD systems is different. Material will be added to the extrusion automatically and the shape of the blend will be adopted to the adjacent geometry.

SolidEdge

SolidEdge



[82] As of V11 SP4 a respective error message will be displayed.