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Extrude and maintain radius of internal angles
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andyww  
#1 Posted : Sunday, April 9, 2017 4:36:14 AM(UTC)
andyww

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I am trying to extrude a shape which has filleted internal sides, at an extrusion offset angle of 8 degrees.

The problem is the arcs of the fillets reduce in radius to zero as the extrusion progresses. This would be expected but is there any way to maintain the arcs constant?
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jdi000  
#2 Posted : Sunday, April 9, 2017 6:14:54 AM(UTC)
jdi000

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Andy

Can you post some pics of what you are describing?

Not sure what this looks like but can you add the radius after extrusion.

Regards

Jason
Windows 11, 10
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L. Banasky  
#3 Posted : Sunday, April 9, 2017 6:30:29 AM(UTC)
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Hi Andy,
As Jason suggested, an example would be helpful.
You could subtract a tapered solid.
Larry
File Attachment(s):
Extrusion.sfx (103kb) downloaded 9 time(s).
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Extrusion.jpg (90kb) downloaded 9 time(s).

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andyww  
#4 Posted : Monday, April 10, 2017 2:57:16 AM(UTC)
andyww

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This shows the issue, the lines should end up parallel rather than the radius tapering and the lines converging, eventually to a point.
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extrude.png (5kb) downloaded 8 time(s).

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L. Banasky  
#5 Posted : Monday, April 10, 2017 4:10:27 AM(UTC)
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Andy,
As Jason suggested:

<<<< Not sure what this looks like but can you add the radius after extrusion.>>>>
seems to work well.
Larry
File Attachment(s):
Extrusion2.sfx (31kb) downloaded 10 time(s).
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andyww  
#6 Posted : Monday, April 10, 2017 11:25:23 AM(UTC)
andyww

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That is what I need to do.

How to do this?

Thanks.
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L. Banasky  
#7 Posted : Monday, April 10, 2017 12:50:32 PM(UTC)
L. Banasky

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Draw the outside and inside lines.
Extrude with 8 degree taper.
Use Constant Blend, and select the corner where the inside
sides meet.
Larry
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andyww  
#8 Posted : Wednesday, April 12, 2017 8:02:39 AM(UTC)
andyww

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When I try this is seems to be applying a fillet to all corners of the selected corner, including the front and back faces.

I have made sure nothing is originally selected, then selecting just the curve in the existing corner does this.
andyww attached the following image(s):
solid.png (23kb) downloaded 9 time(s).

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andyww  
#9 Posted : Wednesday, April 12, 2017 8:38:57 AM(UTC)
andyww

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OK I have this now. Doing a multi-select works.

Thanks!
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