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rjones0215
Posts: 9
Registered: ‎10-01-2011
Message 1 of 8 (242 Views)
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Constraint Virus?

242 Views, 7 Replies
05-02-2012 05:35 AM

For 3 or 4 days now, 90% of the time I place a mate or flush constraint, it automatically offsets to some random direction and I have to reset to zero.  Anyone know what might be causing this?

Inventor 2013 Certified Professional

I have never seen this behavior.

Is this with 2013?

 

Do you have Predict Offset enabled?

Can you attach an assembly here that exhibited this behavior (accept the offset constraint - don't reset it to zero).  Only need the parts that are constrained.

In the constraint dialogue box you have ticked the box with an image of a ruler next to it. When ticked if faces are parallel the dimension they are offset by is automatically placed in the offset box.

 

Regards

 

Martin 

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JDMather
Posts: 27,982
Registered: ‎04-20-2006
Message 2 of 8 (231 Views)

Re: Constraint Virus?

05-02-2012 05:59 AM in reply to: rjones0215

I have never seen this behavior.

Is this with 2013?

 

Do you have Predict Offset enabled?

Can you attach an assembly here that exhibited this behavior (accept the offset constraint - don't reset it to zero).  Only need the parts that are constrained.

Please mark this response as "Accept as Solution" if it answers your question.
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Martin_Goodland
Posts: 302
Registered: ‎07-15-2005
Message 3 of 8 (229 Views)

Re: Constraint Virus?

05-02-2012 06:00 AM in reply to: rjones0215

In the constraint dialogue box you have ticked the box with an image of a ruler next to it. When ticked if faces are parallel the dimension they are offset by is automatically placed in the offset box.

 

Regards

 

Martin 


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johnsonshiue
Posts: 2,282
Registered: ‎04-30-2008
Message 4 of 8 (219 Views)

Re: Constraint Virus?

05-02-2012 06:08 AM in reply to: rjones0215

Hi! Could you show me an example by providing Inventor files or a video? What release of Inventor are you on?

Thanks!

 



Johnson Shiue (johnson.shiue@autodesk.com)
Senior Principal SQA Engineer, Inventor
Mechanical Design
Autodesk, Inc.

Active Member
rjones0215
Posts: 9
Registered: ‎10-01-2011
Message 5 of 8 (217 Views)

Re: Constraint Virus?

05-02-2012 06:10 AM in reply to: rjones0215

Ha.  Yes, I must have clicked the "Predict Offsets" box.  I didn't even know if was there.  It's unchecked now and everything seems to be back to normal.  Thanks again.

Inventor 2013 Certified Professional
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JDMather
Posts: 27,982
Registered: ‎04-20-2006
Message 6 of 8 (205 Views)

Re: Constraint Virus?

05-02-2012 06:55 AM in reply to: rjones0215

Then it should have been 100%  in your original problem description.

Watch out for this one as if your parts are already close to alignment you might not even notice the offset and this is one of the few setting changes that persist after leaving the dialog (I think even after leaving a session of Inventor - but I would have to check on that).

Please mark this response as "Accept as Solution" if it answers your question.
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Active Member
rjones0215
Posts: 9
Registered: ‎10-01-2011
Message 7 of 8 (203 Views)

Re: Constraint Virus?

05-02-2012 06:58 AM in reply to: JDMather

I believe you are correct.  In the future, I will be more cautious of this.

Inventor 2013 Certified Professional
Valued Mentor
Martin_Goodland
Posts: 302
Registered: ‎07-15-2005
Message 8 of 8 (185 Views)

Re: Constraint Virus?

05-02-2012 07:36 AM in reply to: rjones0215

It does persist across sessions (I normally have it turned on). It does only work when the mating faces are aligned though, if there is any rotation then the value remains zero.

 

Regards

 

Martin


PDSU 2014 SP1.3
Windows 7 64bit SP1, Office 2007 Pro
Intel i7 980x, 24 Gb DDR3 RAM
Geforce 760GTX Graphics (Diver 337.88)
256GB SSD OS, 80GB SSD working folder
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