topic Re: Contact Solver Problem in Inventor Forum

Contact Solver Problem

josim8DQR7 — Fri, 14 Apr 2023 17:52:28 GMT

Hi, im using inventor por 2023 and im trying to use the contact solver for 2 rotating parts ( i can rotate them seperatly without problems). the shaft should make the plate move when it collides. I did made a contact pair with the 2 part and if i toggle of the contact solver, they just move through each other (as supposed). If i toggle on the contact solver, there is a collision, but no resulting movement. if i try to rotate the top plate through the shaft, the shaft collides and after i drag the mouse further, i teleports through the plate collision points... any suggestions?

Re: Contact Solver Problem

-niels- — Fri, 14 Apr 2023 10:21:00 GMT

Not sure i can really help you here, but i noticed in your screenshot that the red cross is lit up.
That means there are errors that can interfere with the solver, so make sure you fix those first.
Report back if the contact solver still doesn't work after that and hopefully others can give more suggestions.

Re: Contact Solver Problem

JDMather — Fri, 14 Apr 2023 11:07:32 GMT

@josim8DQR7 wrote:

any suggestions?

1. Environments>Dynamic Simulation 2D Contact Joints.

2. Attach assembly here.

Re: Contact Solver Problem

Gabriel_Watson — Fri, 14 Apr 2023 12:46:26 GMT

Try a Rebuild All first (Manage tab). Then, check your settings under Tools (tab) > Doc. Settings > Modelling > Interactive Contact > set to "Contact Set Only", and see if that helps.

Re: Contact Solver Problem

josim8DQR7 — Fri, 14 Apr 2023 17:54:41 GMT

Thanks for the replies,

1. the red cross error shoudn`t effect the rotation of the 2 parts ( im not a pro, its not a clean solution so far )

2. i attached the assambly file

3. rebuild didnt fixed it, "Contact set only" was already selected

Re: Contact Solver Problem

JDMather — Fri, 14 Apr 2023 20:06:01 GMT

@josim8DQR7

An Inventor assembly is comprised of parts (*.ipt files) and the assembly instructions (*.iam file(s)).

Without the parts - the assembly instructions are useless.

Re: Contact Solver Problem

josim8DQR7 — Fri, 14 Apr 2023 20:22:34 GMT

here is the project

Re: Contact Solver Problem

JDMather — Sat, 15 Apr 2023 13:47:57 GMT

@josim8DQR7

I do not own a license to a rar extractor software, but I do own a license to Windows OS (required to run Inventor). Can you use Windows to zip the files rather than use 3rd party rar compression?

Re: Contact Solver Problem

josim8DQR7 — Fri, 28 Apr 2023 07:30:46 GMT

As i rebuild the so far progress (the problematic files are part of the skill builder learning path), i noticed that in the files there are some errors with imates, and gear alignment which didn`t appear in the learning path videos but are already part of the provided files.

Update: turns out, the carousel plate is effecting the cam shaft as expected (physically plausible, but not needed), but not vice versa ( as needed for correct model behaviour)

Re: Contact Solver Problem

scuciz — Fri, 19 May 2023 19:16:35 GMT

So I was working through the same tutorial that you were and ran into the same problem. It appears that the addition of the bolts using the bolted connection tool for connecting Part P-100-044 and the BearingRing is giving the contact solver issues, but I'm not sure why... As a work-around, what I did was add in one of the ISO bolts from the content center instead of using the bolted connection function, then added a rigid constraint, and then added a circular pattern (which is the same workflow that the Bolted Connection tool goes through, minus the auto-sizing, as you just need to manually select a bolt). When you go through that, now it looks like the CAM can rotate. Hope that helps!

Re: Contact Solver Problem

scuciz — Fri, 19 May 2023 19:27:20 GMT

Accidentally created another post and didn't know how to delete, please disregard this one!

Re: Contact Solver Problem

wvoet — Wed, 21 Jun 2023 20:57:17 GMT

I am having the same issue with the contact solver while doing the skill builder learning tutorial. The carousel plate will contact and move the cam but not vice versa. I tried all the suggestions above including scuciz's work around but that did not work for me. Has anyone figured out a solution? I am running Inventor 2023.3

Re: Contact Solver Problem

dovermyer — Thu, 07 Sep 2023 19:28:09 GMT

I'm still having the problem after taking these steps

Delete the "Bolted Connection" patterns
Delete the orphaned bolts from the above step
Delete the constraints/joints between the gearbox housing, the bearing assembly, and the P-100-044 part
Place normal "mate" constraints between the above components
Verify everything rotates appropriately
Try to rotate the camshaft again
Same results as before - can rotate the P-100-044 part to effect the cam but rotation of the cam leads to incredibly jerky, buggy movement of P-100-044.

After 35 years of AutoCAD use, none of this surprises me.

Re: Contact Solver Problem

johnsonshiue — Thu, 07 Sep 2023 22:48:37 GMT

Hi! I suspect there could be geometry issue within the model. Open the assembly and press Ctrl+F7. Is there any bad body reported? If yes, please open the part and run through Repair Bodies workflow to fix up the bad body.

Another place to check is preexisting interference. In the assembly, go to Inspect tab -> Interference Analysis -> select all components. Is there any interference?

Please feel free to share the files in zip here or directly with me johnson.shiue@autodesk.com. I would like to understand the issue better.

Many thanks!

Re: Contact Solver Problem

muriloaugustt — Fri, 27 Oct 2023 08:51:06 GMT

Greetings,

I have tried exactly the same. But the problem persists, have you possibly done something different regarding the Bolt selection, or maybe on the parameters of the other constraints?

Best Regards.

Re: Contact Solver Problem

dovermyer — Fri, 27 Oct 2023 12:42:40 GMT

While it's difficult to follow the tutorial video due to irregular pacing, the presenter's tendency to gloss over critical steps, and difficulty following the strangely non-highlighted cursor; I'm as certain as I can be that I followed the prescribed steps accurately. I ran through it 5 times. I can only guess it somehow comes down to a hardware or Inventor configuration difference. Work picked up so I stopped trying. If I get time next Summer, I might toss another disk into my workstation, fresh load Windows, and fresh load Inventor to try with a default setup.