Hi Everyone,

I am a student at Portland Community College and, since I'm not in class until Wed., wanted to see if I could get a question answered about a fillet issue I'm having with a project. I've attached two screen shots showing the surfaces I'm trying to fillet: I wouldn't mind if the program resolved them in a neat manner but, as you can see in the second screen shot, the finished product is kind of ugly. The two fillets can't seem to resolve on the multi-angled corner and I have to do them individually because it yells at me, telling me that it's too complicated. I've checked to make sure the underlying geometry and extrudes are actually aligned and am wondering if it's because I'm filleting a rectangle rather than a square? Is there a way to change the ending angle of a fillet so it actually meets the corner? Any help would be greatly appreciated...let me know if any additional screen shots or parameters would be helpful in answering the question.

Hi Colin,

It's likely this doesn't work because the angle of the two adjacent faces are not the same value; in other words, one is sloping greater than the other and therefore you can not apply a fillet to both edges as you might expect because the first fillet doesn't know how to "blend" to the second. You can verify this by applying a .25mm fillet to all 4 intersecting edges. Is there a equal intersection of faces on either side of the sloping edge?

If it is true that the two face's slopes that meet each other are not equal in angle, then the solution you are looking for is geometrically impossible. Take a look at the attached model. There are three configurations on the model, click on the Equal slope config. Is this what you are trying to achieve? If so, you need those two adjacent faces slope angles to be equal. Now click on the unequal solution solution config. Zoom into the corner where the two fillets meet. See the gap difference between them. Now the third is the only possible solution if you have unequal slopes - you'll need to blend the difference between them.

Are constant fillets use what is refered to in the industry as a "rolling ball" solution. The fillet will only be applied as the imaginary rolling ball rolls along the inside corner. This is why SW results with "flats" that you see in your image; the ball only rolls to the dialogal crease and stops.

Hopes this helps.

Mark

Senior Product Specialist - New Product Concepts