Constraint Problem- Suite 2009 SP1

[Anonymous]

Hey guys and gals...



I'm having a problem with Inventor Suite 2009 SP1, wherein, I have two holes on a hinge that are 1.8898" apart, and two Pem Studs on the mating door panel that are also exactly 1.8898" apart, vertically aligned, and fully constrained in the related sketch.



Now, when I place an Insert Constraint on the top hole on the inside of the panel, to the Hinge's corresponding top hole on the outside surface, it places the door panel on the hinge. No problem.



When I place either an Insert Constraint in the same fashion as above to the second hole, or a Mate Constraint to the axis of the shaft of the Pem Stud and to the second hole in the hinge, the constraints "blow up" and generate a list of conflicting constraints.



This should be a simple thing for Inventor to do.



What gives?



Thanks in Advance.

[Edit]-jpegs of problem attached[/Edit] Edited by: AgCyanide on Oct 16, 2008 4:32 PM

[Anonymous]

What Gives?

The holes do not line up exactly.

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[R.Corriveau]

Did you model the hinge or was it translated in from step, iges etc?

[Anonymous]

I would change your precision when you measure to all
decimals, and make sure they are the same.

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"AgCyanide" wrote in message
href="news:6053199@discussion.autodesk.com">news:6053199@discussion.autodesk.com...

Hey
guys and gals...

I'm having a problem with Inventor Suite 2009 SP1,
wherein, I have two holes on a hinge that are 1.8898" apart, and two Pem Studs
on the mating door panel that are also exactly 1.8898" apart, vertically
aligned, and fully constrained in the related sketch.

Now, when I place
an Insert Constraint on the top hole on the inside of the panel, to the
Hinge's corresponding top hole on the outside surface, it places the door
panel on the hinge. No problem.

When I place either an Insert
Constraint in the same fashion as above to the second hole, or a Mate
Constraint to the axis of the shaft of the Pem Stud and to the second hole in
the hinge, the constraints "blow up" and generate a list of conflicting
constraints.

This should be a simple thing for Inventor to
do.

What gives?

Thanks in Advance. [Edit]-jpegs of problem
attached[/Edit] Edited by: AgCyanide on Oct 16, 2008 4:32 PM

[JDMather]

Ground the two PEMs. Delete the rest of the parts except the PEMs and the hinge. Zip and attach 2 ipt and the iam here.

[Anonymous]

It was translated from a step file.

[Anonymous]

How do you figure the holes don't line up exactly? There is no deviation from zero in 2 axes (Delta X, Delta Y) and I've measured the part to 4 decimal places, and the hole centers measure .205" from the right side edge of the hinge.

[R.Corriveau]

Then measure the translated part using all decimals.My guess is the translated part isn't correct out to the .xxxxxxxxxxxxxxxxxxxxx decimal
place which will cause it to fail.

[Anonymous]

That worked... Thanks bro. I must say though, I find it hilarious that you would need to carry the dimensions out to 9+ decimal places to get a constraint to work.

I don't even think a Machine Shop can hold that kind of precision, without charging you some astronomical amount for the part.

[JDMather]

>It was translated from a step file.

Post the step or the ipt, doesn't matter as far as finding the problem.

[JDMather]

> I find it hilarious that you would need to carry the dimensions out to 9+ decimal places to get a constraint to work.

I assume the holes were off in the translated STEP file. Could it be a conversion between inches/mm problem?

[JDMather]

>I don't even think a Machine Shop can hold that kind of precision

You could use the Delete Face with Heal option to remove the holes and put them back in at exactly 1.8898".

[Anonymous]

The Forum won't allow me to post the .ipt file of the hinge. :( Edited by: AgCyanide on Oct 17, 2008 11:23 AM

[Anonymous]

There's your clue... Try the Delete Face with heal option and
remake the hole. 4 decimal places is nothing.

--
Dennis Jeffrey, Autodesk Inventor Certified
Expert
Autodesk Manufacturing Implementation Certified
Expert.
Instructor/Author/Sr. App Engr.
AIP 2008 SP2, AIP 2009-SP1
PcCillin AV
HP zv5000  AMD64 2GB - Geforce Go 440, Driver: .8185
XP
Pro SP2, Windows XP Silver Theme

href="http://teknigroup.com">http://teknigroup.com

[R.Corriveau]

"I must say though, I find it hilarious that you would need to carry the dimensions out to 9+ decimal places to get a constraint to work."

Same here.

[JDMather]

>The Forum won't allow me to post the .ipt file

This is an Inventor forum - you cannot post native Inventor files. You must zip the file first.

[Anonymous]

The solution to your problem is simple - SolidWorks

I recently had to change jobs -got laid off- and am forced to use Inventor. I've used it for quite a while now and, trust me, Inventor is no match for SolidWorks. I too have simple, stupid ace problems that I know SW would not give me. Inventor is still behind the times. I've even had people who have used it for YEARS that have switched to SW and tell me it is not as powerful as SW and Inventor is intended for the not-so-bright engineer (user). Edited by: jamesh39 on Jul 23, 2009 1:43 PM

[Anonymous]

The best software is the software you know the best..... especially without
training.

--
Dennis Jeffrey, Autodesk Inventor Certified Expert
Autodesk Manufacturing Implementation Certified Expert.
Instructor/Author/Sr. App Engr. Tel. (260) 399-6615
AIP 2008 SP3, AIP 2009-SP2, IV2010 ProPcCillin AV
AMD 64 x2 3.0 Ghz, 8GB RAM GeForce 9800GT 512MB
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[JDMather]

>The solution to your problem is simple - SolidWorks

LOL, this was just posted a couple of days ago on the SWx forum

http://www.eng-tips.com/viewthread.cfm?qid=249951&page=1

>trust me, Inventor is no match for SolidWorks

Why should I trust you? What is your name and credentials? What is the url for examples of you work?

> Inventor is intended for the not-so-bright engineer (user).

Yep, I trust your judgment.

Dr. Mather
Certified SolidWorks Professional
Autodesk Inventor Certified Expert

[Anonymous]

My experience is 10+ years in tool and die, helicopters and CNC routers (all in the design/engineering field). I have used a handful of CAD programs and Inventor is by far the one in last place. I love how ya'll brag with your long signatures. What's next, "Rocket Scientist"?

Any way, cheers...thank God we don't need drafting tables any more...