# Problem with tie constraint

**URL:** <https://prepomax.discourse.group/t/problem-with-tie-constraint/2950>\
**Category:** General Questions\
**Created:** [September 5, 2025, 7:03am UTC](https://prepomax.discourse.group/t/problem-with-tie-constraint/2950 "2025-09-05T07:03:19Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Metalworx](https://avatars.discourse-cdn.com/v4/letter/m/4491bb/32.png) [@Metalworx](https://prepomax.discourse.group/u/Metalworx)\
**Post date:** [September 5, 2025, 7:03am UTC](https://prepomax.discourse.group/t/problem-with-tie-constraint/2950/1 "2025-09-05T07:03:19Z")

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Hi

I think i have a problem with tie constraint in my frame case. First two constraint works well, I have only problem with gusset. Tried merging parts, tried compound part → then I can’t mesh part, tried swapping master/slave, tried constraint only surface, whole part etc. Tried also set adjust to no in tie constraint data. Always gusset goes on own way away from frame.

 ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/c/c1248afb99069699fccf7c404b5fa3dd83d96da0.jpeg)

Interesting is fact that with previous model (thinner pipe wall) it seems to work properly with same constraints. I have trial FEA license in IronCAD to compare results and with thinner wall it was okay, even results were similar. Then i made new stronger frame and can’t compare results due to gusset moving

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**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\
**Post date:** [September 5, 2025, 7:52am UTC](https://prepomax.discourse.group/t/problem-with-tie-constraint/2950/2 "2025-09-05T07:52:53Z")

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Did you try significantly increasing position tolerance ? This is the key setting in such cases.

You could also try tied contact, sometimes it works better than tie constraints despite being nonlinear.

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<div class="post-metadata">

**Author:** ![Metalworx](https://avatars.discourse-cdn.com/v4/letter/m/4491bb/32.png) [@Metalworx](https://prepomax.discourse.group/u/Metalworx)\
**Post date:** [September 5, 2025, 8:02am UTC](https://prepomax.discourse.group/t/problem-with-tie-constraint/2950/3 "2025-09-05T08:02:33Z")

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Noo way that’s it, increased position tolerance to 0.5mm and it’s working, also very similar results to FEA module in IronCAD.

Thanks guys, you and Matej are doing a mega job, also surprised by quick response time.

 ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/2/22a2c637fa874f3515693c974e815a16f22dd2e9.png)