topic Re: Issues with constraining in Inventor Forum

Issues with constraining

Anonymous — Fri, 28 Apr 2017 07:51:38 GMT

Good morning

I am attempting to constrain a dished end onto a cylindrical extrusion (the extrusion is a part i want to be able to change the size of, whilst keeping the constraint at the top) though when i change the dimension the constraint does not remain.

Could anyone advise?

See images

Re: Issues with constraining

Fouad-l — Fri, 28 Apr 2017 08:18:59 GMT

Hi @Anonymous

Please tell us how you constraint the two parts.

Thanks

Re: Issues with constraining

Anonymous — Fri, 28 Apr 2017 09:01:45 GMT

Hi,

Thanks for the reply,

I am placing a "mate" constraint from the two edges on the picture.

Re: Issues with constraining

Fouad-l — Fri, 28 Apr 2017 09:38:31 GMT

I think you should create a working plane in the Dished end part to constraint two parts better.

Please see my screencast below. (my Inventor is in Spanish)

http://autode.sk/2oDqdtu

Re: Issues with constraining

mgeurts — Fri, 28 Apr 2017 10:47:30 GMT

You can constrain work planes and axes

Re: Issues with constraining

Anonymous — Fri, 28 Apr 2017 12:34:42 GMT

Hello,

Thankyou for the video response it was helpful. However you have changed the width of the cylindrical shape to 20 horizontally without the dished end moving, i need the shape to be changed in size vertically, with the end staying attached to the top.

Re: Issues with constraining

JDMather — Fri, 28 Apr 2017 12:55:10 GMT

@Anonymous wrote:

.... However you have changed ....

Am I missing something?

I do not see your files attached here?

Re: Issues with constraining

Fouad-l — Fri, 28 Apr 2017 13:18:35 GMT

Hi.

I changed the cylinder length (vertical) and works.

Re: Issues with constraining

Fouad-l — Fri, 28 Apr 2017 13:23:56 GMT

Hi @JDMather

we are tallking about this screencast, where i have made a demo of how to do the constraint. i changed the inicial value of the cylinder diameter.

Re: Issues with constraining

Fouad-l — Fri, 28 Apr 2017 13:36:54 GMT

... and this is a screencast of a vertical change made to the cylinder.

http://autode.sk/2oSLueR

Re: Issues with constraining

JDMather — Fri, 28 Apr 2017 14:04:20 GMT

@Fouad-l wrote:

Hi @JDMather

we are talking about ...

And I am talking about Inventor files. (*.ipt, *.iam)

The files that will show the actual constraint structure used by the OP.

Re: Issues with constraining

kpyoung333 — Fri, 28 Apr 2017 18:19:37 GMT

Might be as simple as instead of using the mate command in main Assemble Tab drop down the Relationships tab and select Assemble (or hot key A, don't know if that's setup as default but I put it as A and Constrain as Alt+A for different uses...). Or create a plane on the bottom of the cap and top of the cylinder and mate them with the center z-axis mated (which is pretty much what the assemble command does all at once).