topic Re: set the length of a part in assembly in Inventor Forum

set the length of a part in assembly

rezaal7675 — Mon, 28 Dec 2020 16:34:43 GMT

I want to mate this two hole in assembly but the part 1 is a little short and I don't now how much taller should it be. how can I fix that?

Re: set the length of a part in assembly

JDMather — Mon, 28 Dec 2020 17:14:22 GMT

Measure the distance between the two holes in the assembly and then edit the part to equivalent center-to-center distance.

Re: set the length of a part in assembly

SBix26 — Mon, 28 Dec 2020 17:19:27 GMT

Zip and post your files here, and tell us what version of Inventor you're using.

I would either measure the distance in the assembly, then copy and paste that number in the part sketch that defines that hole spacing. Or, if you know the defining geometry, you could write a proper equation for that calculated distance.

If I were modeling this, I would do it as a master model with derived parts making up the assembly. In that case, there would be no question.

Sam B
Inventor Pro 2021.2 | Windows 10 Home 2004
LinkedIn

Re: set the length of a part in assembly

rezaal7675 — Mon, 28 Dec 2020 17:50:20 GMT

Thankyou. It's done

Re: set the length of a part in assembly

rezaal7675 — Mon, 28 Dec 2020 18:01:18 GMT

Actually I'm amateur in inventor and still don't know about derived parts. but I will try to learn it. Thank you

Re: set the length of a part in assembly

SBix26 — Mon, 28 Dec 2020 19:33:25 GMT

If you'd like an example to look at, post your simple assembly and parts here (Zip them) and I'll create it for you using master modeling technique. Be sure to include what version of Inventor you're using so you can open what I create.

Sam B
Inventor Pro 2021.2 | Windows 10 Home 2004
LinkedIn

Re: set the length of a part in assembly

rezaal7675 — Mon, 28 Dec 2020 20:18:38 GMT

I would be appreciated . It's not a complete model. I was practicing and I have the student version of Autodesk Inventor 2021 . Thank you.

Re: set the length of a part in assembly

SBix26 — Tue, 29 Dec 2020 00:23:38 GMT

Here is my demonstration of something similar to your assembly using the master modeling technique (Inventor 2021 format). Note that all the geometry is defined in the Master Part file, and that's where you would make any changes to the assembly. For example, try moving the mounting holes on the vertical square tube by adjusting the dimensions; then update the assembly, and see what happens. The parts making up the assembly are each derived from the master part, in which each part is defined as a separate solid body; expand the Solid Bodies folder to see each one listed, with all its defining features.

Now, some serious advice: you must get some training!! Your parts and assembly are a disaster. Some of your parts have no sketch dimensions at all, none of them are completely defined. You must learn, now, before you develop bad habits, to define everything, leave no degrees of freedom until you have a good reason to. I found that most parts were exact nominal dimensions, meaning that you used dimensions then deleted them (I can tell, because when I add a dimension it is, for example d11, not d0). Do not do that. Each sketch should say "fully constrained" in the bottom right corner before you are finished with it, and show a pin in the browser icon. As you look through the master part I created you will see that each sketch is completely constrained and dimensioned, and is a different color than yours-- sketch elements turn a different color, usually darker, when they are fully constrained-- actual color depends on the color scheme you have chosen. You want all of your sketch elements to be that darker color before you're done. We can deal with assembly constraints later...

Feel free to ask questions as you browse through this model. @JDMather is a master teacher, so he will have good advice and explanations, too.

One more thing, you need to update your Inventor 2021 installation. You are still using the initial release version, but 2021.2 is the current update level.

Sam B
Inventor Pro 2021.2 | Windows 10 Home 2004
LinkedIn

Re: set the length of a part in assembly

rezaal7675 — Tue, 29 Dec 2020 11:56:04 GMT

Thank you very much for your complete and clear guidance. I will definitely follow your instruction.