Template:Problem solving circular fillet

Circular fillets can be very tricky. Your geometry needs to be very 'clean'. On some geometry, a fillet may just not work. Alternatively you could use a Freeform Fillet between two isoparms on both surfaces.

Some problems can be solved relatively easily however:

• Tolerance

A problem with precision or tolerance may also arise with Circular Fillet.

Solution: You can increase the tolerance in the Options of the Circular Fillet Tool. A smaller number will result in a higher precision and may be required when intersecting small surfaces. Another solution is to increase the overall scale of your objects.

• Wrong side

The fillet is created on the wrong side of the surface(s). It might not even show up because it cannot be created on that side (radius is too big).

Solution: This problem is caused by the direction of the surface normal of both surfaces. The fillet will be created on the 'positive' side of both surfaces. You can fix this in several ways:

• When creating a fillet, use the Reverse surface normal setting in the Circular Fillet Optionbox;
• On an existing fillet, you can change one of the radii (or both) into a negative value in the INPUTS of the fillet (rbfSrf) that are shown channelbox (history).
• Change the surface normal of one of the surfaces manually through Edit NURBS > reverse Surface Direction.