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Valued Contributor JM.
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JM.
Posts: 55
Registered: ‎01-07-2011
Message 1 of 10 (3,849 Views)
Accepted Solution

Constraint locks object

3849 Views, 9 Replies
01-10-2011 01:48 PM

When I add a single constraint to an object it locks in into position.  Also, non-related constraints are causing error messages (for example inserting a screw is causing an error in a flush constraint in non-related parts).  I had issues with this in the previous release of Inventor but have not had a problem with 2011.  This problem just occurred today - attempts to delete problem parts and rebuild the assembly does not resolve the issue.

 

Any suggestions as to the problem?

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dan_inv09
Posts: 2,300
Registered: ‎12-12-2006
Message 2 of 10 (3,834 Views)

Re: Constraint locks object

01-10-2011 04:39 PM in reply to: JM.

Suggestions:

 

1. Too much adaptivity - turn as much adaptivity as possible off (unless the latest constraint is supposed to affect it, it should not be adaptive at this time.)

 

2. Daisy chained assembly - Let's say part A is grounded and part B is constrained to it, then part C is constrained only to B, and D only to C etc. It's got to figure out each constraint and how it affects each other constraint and after a while it just gives up and parts you place don't want to move. Temporarily grounding some stuff near where the new stuff is going sometimes got it to work when I used to have this problem.

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blair
Posts: 3,964
Registered: ‎11-13-2006
Message 3 of 10 (3,832 Views)

Re: Constraint locks object

01-10-2011 04:53 PM in reply to: JM.

Look for a bad contraint somewhere in your assembly. It could be in a sub-assembly as well.

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Valued Contributor JM.
Valued Contributor
JM.
Posts: 55
Registered: ‎01-07-2011
Message 4 of 10 (3,791 Views)

Re: Constraint locks object

01-11-2011 07:51 AM in reply to: JM.

Rather than chase through all the constraints I have decided to rebuild the object (sliding window) in a new assembly (I changed the frame parts to a new profile which created the constraint crash).  Now if I add a constraint I cannot move the object, however additional constraints will work to properly align the object.  I seem to remember this happening before as well and it was a matter of a setting being changed but of coarse I cannot remember where of if this was in fact the problem. Have you experienced this issue?

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JDMather
Posts: 26,342
Registered: ‎04-20-2006
Message 5 of 10 (3,788 Views)

Re: Constraint locks object

01-11-2011 07:57 AM in reply to: JM.

Zip and attach your assembly here.

Please mark this response as "Accept as Solution" if it answers your question.
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Valued Contributor JM.
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JM.
Posts: 55
Registered: ‎01-07-2011
Message 6 of 10 (3,776 Views)

Re: Constraint locks object

01-11-2011 08:44 AM in reply to: JM.

It won't let me send the file at 3.2 MB, I am trying to eliminate as much stuff as possible but still keep enough stuff to demonstrate the problem.

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JDMather
Posts: 26,342
Registered: ‎04-20-2006
Message 7 of 10 (3,765 Views)

Re: Constraint locks object

01-11-2011 09:22 AM in reply to: JM.

Roll up the EOPs to make the ipts smaller before zipping.

I suspect you should be able to isolate the problem to two or three parts in the assembly.

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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Valued Contributor JM.
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JM.
Posts: 55
Registered: ‎01-07-2011
Message 8 of 10 (3,744 Views)

Re: Constraint locks object

01-11-2011 11:49 AM in reply to: JM.

Attached file.  Oddly enough I can't even get the constraints to work on these three pieces even though I had assembled it earlier in the day.  All that is missing is a flush constraint so that all the parts line up.

 

This project seems to be the only one that will not work.  Other window (larger) window drawings still work fine.

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blair
Posts: 3,964
Registered: ‎11-13-2006
Message 9 of 10 (3,739 Views)

Re: Constraint locks object

01-11-2011 11:54 AM in reply to: JM.

Works fine here

Did you find this reply helpful ? If so please use the Accept as Solution or Kudos button below.

IV2015 up1 PDSU / Sim Mech 2015 /
Win7-64
EVGA X79 - Classified, iCore7 3930k 32Gb Quad-Channel
950Gb (2 x 500Gb Sata III SSD RAID0 Adaptec 6805E Controller)
Nvidia GTX-690 Classified - 335.23
SpacePilot Pro 3.17.7, 6.17., 4.11
Valued Contributor JM.
Valued Contributor
JM.
Posts: 55
Registered: ‎01-07-2011
Message 10 of 10 (3,714 Views)

Re: Constraint locks object

01-12-2011 08:56 AM in reply to: JM.

Problem seems to be rooted in bad frame drawings at the cad level.  I redid the vendor drawings by tracing the section outline using P-lines.  When these were extruded and imported into the assembly all the previous issues vanished and the window will now function properly.  

 

 

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