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Member
Posts: 3
Registered: ‎11-07-2012
Message 1 of 7 (342 Views)

Need Help with LOTS of OPEN LOOPS... :(

342 Views, 6 Replies
11-07-2012 09:59 PM

I've finished sketching what will be the design for an engine block and I am encountering an error when trying to extrude the sketch. I really dont want to have to re-draw this sketch from the beginning. What could be my problem?

*Expert Elite*
Posts: 873
Registered: ‎02-16-2006
Message 2 of 7 (337 Views)

Re: Need Help with LOTS of OPEN LOOPS... :(

11-07-2012 10:28 PM in reply to: SupraStoked

The problem is the sketch pattern of open loops, they do not constrain end points even if they mathmatically exact.

Create the extrusion from a base closed loop and pattern as a feature.

 

*Expert Elite*
Posts: 25,288
Registered: ‎04-20-2006
Message 3 of 7 (313 Views)

Re: Need Help with LOTS of OPEN LOOPS... :(

11-08-2012 12:38 AM in reply to: SupraStoked

Edit your sketch.

Right Mouse button and select Show All Constraints.

What do you see?

 

This is actually a simple sketch to do if you start over, about 5 minutes work.

Keep sketches simple and pattern (and mirror) features  rather than pattern sketches as suggested.
You are doing wayyyyyy too much work.

In fact, this one is soooo simple I would do it over for you if you find it too hard to do over, if you attach your file here.

 

I recommend you start here

http://home.pct.edu/~jmather/SkillsUSA%20University.pdf

Please mark this response as "Accept as Solution" if it answers your question.
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jclaidler
Posts: 484
Registered: ‎10-29-2009
Message 4 of 7 (251 Views)

Re: Need Help with LOTS of OPEN LOOPS... :(

11-08-2012 11:49 AM in reply to: SupraStoked

That sketch is way too complicated.  Keep sketches as simple as possible.  Great rule, start from the outside in.  The outside profile would be your first sketch, but keep fillets, chamfers and patterns (arrays) out of all sketches.  Those are best managed as a feature.

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Posts: 3
Registered: ‎11-07-2012
Message 5 of 7 (181 Views)

Re: Need Help with LOTS of OPEN LOOPS... :(

11-12-2012 06:36 AM in reply to: JDMather
When i hit show all constraints, i got what looked like an electron cloud all around my sketch.. Okay, ill give it a shot later today. Thanks everyone for the help. P.s. what happened to that little "pill bar" that would show up next to my cursor when i would highlight a sketch feature? That thing was very useful and I can never get it to come up anymore... Sent from my iPhone
*Expert Elite*
Posts: 25,288
Registered: ‎04-20-2006
Message 6 of 7 (175 Views)

Re: Need Help with LOTS of OPEN LOOPS... :(

11-12-2012 07:00 AM in reply to: SupraStoked

SupraStoked wrote:
When i hit show all constraints, i got what looked like an electron cloud ....

Inventor has to solve all of those sketch constraints. Making complicated sketches like this will bring your computer to it's knees.

That is why everyone is suggesting to pattern features rather than sketches.

Please mark this response as "Accept as Solution" if it answers your question.
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Autodesk Inventor 2014 Certified Professional
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Member
Posts: 3
Registered: ‎11-07-2012
Message 7 of 7 (166 Views)

Re: Need Help with LOTS of OPEN LOOPS... :(

11-12-2012 08:00 AM in reply to: JDMather
Oooh makes sense, thanks everyone! Problem solved. Sent from my iPhone

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