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mstevens1-Visitor
1-Visitor
June 17, 2012
Solved

Sketches - Fillets don't Offset

  • June 17, 2012
  • 2 replies
  • 3103 views

I am new to Creo. I am trying to figure out why fillets don't offset. Here is what I mean...

 

1. Create a sketch.

2. Create a rectangle.

3. Fillet each corner of the rectangle

4. Click Offset

5. Select Loop from the "Type" dialog

6. Select one side of the rounded rectangle

7. Type a value for the offset such that the offset is inside the original rounded rectangle and hit enter.

 

Step 7 yields a "rectangle" for me; i.e. corners are perpendicular not rounded.

 

If...

7. Type a value for the offset such that the offset is OUTSIDE the original rounded rectangle and hit enter.

 

Then Step 7 yields a rounded rectangle.

 

Is this a feature or a bug?

 

Thanks

 

Melvin


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Best answer by Kevin

Without seeing what you are actually doing it sounds like you are offsetting to create an inner loop with a value equal to or greater than the fillet radius. In this case you will get a square.

2 replies

K
Kevin1-VisitorAnswer
1-Visitor
June 17, 2012

Without seeing what you are actually doing it sounds like you are offsetting to create an inner loop with a value equal to or greater than the fillet radius. In this case you will get a square.

M
mstevens1-VisitorAuthor
1-Visitor
June 18, 2012

Yes is seems that if the offset is >= the fillet radius, that the fillet on the offset is just deleted and replaced perpendicular lines. Will try to post pictures later.

T
TomD.inPDX17-Peridot
17-Peridot
June 17, 2012

You are right, this does seem to be a bug. I can select the wall, fillet, wall and it works fine, but remove one of the walls and the feature fails. Care to report it as a bug?

Confirmed in Creo 2.0 F000

As an indiviual surface, the fillet (round) does offset. I get the failure in either direction if the round is one of the edge boundries. It appears to require bounding on both straight edges.

offset_issue_creo2.jpg

Left: Offset edit with only 2 surfaces selected; right: additional surface selected. Both have preview enables.

T
TomD.inPDX17-Peridot
17-Peridot
June 17, 2012

It doesn't know how to deal with the tangency. It should just default to a shear but it doesn't. If you have a non-tangent edge, it works fine. Still something that could use an enhancement.

The issue is not limited to rounds. It "fails" even with a sketched tangent radius.

Working_edge.JPG

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