Inventor General

## Inventor General

Contributor
Posts: 20
Registered: ‎06-30-2010
Message 1 of 11 (901 Views)

901 Views, 10 Replies
07-17-2010 08:07 AM

Hi there,

Any help would be greatly appreciated.

thanks

Jonny

*Pro
Posts: 1,369
Registered: ‎12-15-2003
Message 2 of 11 (886 Views)

07-17-2010 05:29 PM in reply to: jonnyrotten

You can post your files here. No need for customer files. What version of Inventor are you using?

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Dennis Jeffrey, Author and Manufacturing Trainer, Autodesk Inventor Certified Expert
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Contributor
Posts: 20
Registered: ‎06-30-2010
Message 3 of 11 (875 Views)

07-18-2010 02:23 AM in reply to: Dennis_Jeffrey

Oh, i presumed that is what it was for but i have attached my files here now. I'm using inventor 2010.

thanks

*Pro
Posts: 1,369
Registered: ‎12-15-2003
Message 4 of 11 (871 Views)

07-18-2010 03:47 AM in reply to: jonnyrotten

I do not have much time for this, but It looks like you have gone a wrong direction.  Gravity does not change,  The road may/will. The arrow should be the first part (Grounded) - no need for any constraints.

If the road angle changes then Gravity will stay the same.

I am assuming there is some type of load on the wheels above the road. as a result, As a result, then Center of  Gravity for the separate subassembly (call it loaded vehicle) will be impacted by the direction of  Gravity. If the vehicle is in motion, then Centrifugal Force will also come into play.

Are you planning to calculate all forces?

____________________________________________________________
Dennis Jeffrey, Author and Manufacturing Trainer, Autodesk Inventor Certified Expert
Autodesk Manufacturing Implementation Certified Expert
Autodesk Silver Manufacturing Partner

Subscribe to the free digital "The Creative Inventor Magazine" now available at: http://teknigroup....

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Posts: 20
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Message 5 of 11 (869 Views)

07-18-2010 04:46 AM in reply to: Dennis_Jeffrey

No I am just showing the lean animation as part of a presentation and do not need to calculate forces. For disscussions sake, lets say that my arrow isn't gravity and its just a part, surely it should work as an adaptive part and one end of it could be constrained to the road and then shorten as the assembly leans?

I am not running this in dynamic simulation, just a simple animation with an adaptive part.

I have resultant and centrifugal forces but didn't include them in the uploaded assy as i am not stuck on those. Its only the arrow that I have included that isn't working.

*Expert Elite*
Posts: 24,760
Registered: ‎04-20-2006
Message 6 of 11 (859 Views)

07-18-2010 08:06 AM in reply to: jonnyrotten

I noticed that your parts and assembly could probably be simplified quite a bit - extra workplanes and axis, sketches not constrained.

And watch out for this beginner mistake (see attached).  You tap drill size is incorrect.  If you used the Hole feature for threaded holes rather than extruded circles you would avoid making this mistake.

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Contributor
Posts: 20
Registered: ‎06-30-2010
Message 7 of 11 (851 Views)

07-18-2010 08:57 AM in reply to: JDMather

Thanks for the input - thankfully i'm not going to be using these for manufacturing drawings so it doesn't really matter. There are many planes/axes because these parts are used in many assemblies and animations. There is no excuse for unconstrained sketches though!

I have attached a simple assembly - could someone please tell me why the arrow isn't behaving as an adaptive part even though adaptivity is turned on in both the part and the assembly? I should be able to change angle2 to 10 degress and the arrow should shorten as its adaptive but instead it gives conflicting contraints.

Jonny

Contributor
Posts: 20
Registered: ‎06-30-2010
Message 8 of 11 (836 Views)

07-18-2010 10:01 AM in reply to: jonnyrotten

I've got a little closer to the solution - the arrow doesn't seem to work as adaptive if its constrained to a work axis - it does work when it is constraint to parts. Anyone aware of this?

Employee
Posts: 94
Registered: ‎09-24-2008
Message 9 of 11 (786 Views)

07-19-2010 11:47 AM in reply to: jonnyrotten

Using an adaptive work axis should be fine. From a quick look it appears the problem is that the work axis does not drive your sketch geometry and the axis is not adaptive. See the attached video for a possible solution. This does not solve the issues JD mentions, only the adaptivity question.

Patrick Miller
Senior Content Developer
Autodesk, Inc.

Valued Mentor
Posts: 426
Registered: ‎06-07-2010
Message 10 of 11 (781 Views)

07-19-2010 11:59 AM in reply to: jonnyrotten

Try this out.  I made a new arrow.

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