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darren.howarth
Posts: 4
Registered: ‎03-24-2011
Message 1 of 6 (326 Views)
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Can not extrude a pattern sketch that is fully constrained

326 Views, 5 Replies
01-27-2014 09:15 PM

Hi l am using Inventor 2013 l can not extrude a fully constrained sketch. l done a 2D profile then used the circle Patten command to complete the profile in the sketch. Now l can not extrude the sketch and do not know why? l have attached the file to see if anyone can help.

 

Any help would be greatly appreciated.

 

Regards

Darren

 

 

Active Member
vince480
Posts: 6
Registered: ‎06-27-2012
Message 2 of 6 (309 Views)

Re: Can not extrude a pattern sketch that is fully constrained

01-28-2014 01:11 AM in reply to: darren.howarth
Is it something to do with your sketch pattern?

Have you closed the loop properly?

If you create a new sketch and project your previous sketch onto this, can you then extrude the projected sketch?
*Expert Elite*
-niels-
Posts: 1,460
Registered: ‎06-20-2006
Message 3 of 6 (307 Views)

Re: Can not extrude a pattern sketch that is fully constrained

01-28-2014 01:21 AM in reply to: darren.howarth
Welcome to the Forum!

Sketch patterns do not automatically connect endpoints, so you basically have a lot of disconnected loops.

You might try going at it differently, making a cylinder shape first and removing a single "tooth" then make a pattern of that single extrusion.

Using IV2014 Pro SP2, Win7-64bit
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JDMather
Posts: 26,161
Registered: ‎04-20-2006
Message 4 of 6 (296 Views)

Re: Can not extrude a pattern sketch that is fully constrained

01-28-2014 03:58 AM in reply to: darren.howarth

Why did you create the outer arcs as two arcs rather than one?

Edit the sketch and right mouse button select Show All Constraints.  What do you see?

 

In the browser right click on the sketch and select Sketch Doctor.  Diagnose the sketch and run through the repair.

 

Is noted - it is (almost) always better to model simple geometry and pattern the feature rather than pattern sketch entities.

 

I will try to post a couple of alternative techniques later today when I get to my 2013 machine.

 

Extrude and pattern this.

Pattern Pie.PNG

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Member
darren.howarth
Posts: 4
Registered: ‎03-24-2011
Message 5 of 6 (235 Views)

Re: Can not extrude a pattern sketch that is fully constrained

02-24-2014 04:34 PM in reply to: JDMather
Thanks for your help this is a much better way
Member
darren.howarth
Posts: 4
Registered: ‎03-24-2011
Message 6 of 6 (235 Views)

Re: Can not extrude a pattern sketch that is fully constrained

02-24-2014 04:36 PM in reply to: -niels-
Thanks for your help this is a much better way.
Cheers

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