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ACcanopy
Posts: 2
Registered: ‎05-01-2012
Message 1 of 11 (360 Views)

Beam is becoming skewed/distorted in assembly

360 Views, 10 Replies
05-01-2012 07:50 AM

Hi I'm Alex and I am new to Inventor. We just switched to Invetor From CAD and have been learning as i go mostly. I have been experiencing problems that are leading to major setbacks due to requireing me to redraw multiple items.  With my job we have to use wide flange beams and square columns etc... I'm able to draw the indidviual parts and at times have no problem with anything being offset, crooked, skewed or anything. But I find that I'm duing something in the assembly process that is causiing my parts to become skewed/distorted in the assembly and thus also on my view layouts for prints. 

 

If anybody can help me with this problem i would greatly appreciate it!!!

 

Thanks again guys.

 

 

Alex

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JDMather
Posts: 26,185
Registered: ‎04-20-2006
Message 2 of 11 (357 Views)

Re: Beam is becoming skewed/distorted in assembly

05-01-2012 08:03 AM in reply to: ACcanopy

Your first part in an assembly should be grounded.

If you unground it and move it around your views will become skewed.

This can be fixed, but let's see what you really have.

Attach your files here.

Please mark this response as "Accept as Solution" if it answers your question.
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ACcanopy
Posts: 2
Registered: ‎05-01-2012
Message 3 of 11 (354 Views)

Re: Beam is becoming skewed/distorted in assembly

05-01-2012 08:06 AM in reply to: JDMather

Thanks for the response. I would love to attatch a file but we have an elevated confidentiallity contract and i cannot post any business work on here. Believe me i wanted to be able to show exactly what is happening but instead have to talk my way through it.  When you say ground it what do you mean and how do you do that?

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kstate92
Posts: 895
Registered: ‎05-09-2005
Message 4 of 11 (339 Views)

Re: Beam is becoming skewed/distorted in assembly

05-01-2012 11:03 AM in reply to: ACcanopy

Constrain the part to the pricipal work planes, axes, and origin point in the assembly file until it has zero degrees of freedom (can't move it by dragging).  When you start with a blank iam file and insert a part, the first part is (always?) automatically constrained.  You then constrain the subsequently inserted parts to the first part (or the assembly origins if you wish).

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mcgyvr
Posts: 6,646
Registered: ‎12-01-2004
Message 5 of 11 (329 Views)

Re: Beam is becoming skewed/distorted in assembly

05-01-2012 11:45 AM in reply to: kstate92

kstate92 wrote:

 the first part is (always?) automatically constrained.


always automatically grounded.. (not constrained)

 

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JohnK_TEDCF
Posts: 72
Registered: ‎08-16-2010
Message 6 of 11 (323 Views)

Re: Beam is becoming skewed/distorted in assembly

05-01-2012 11:54 AM in reply to: ACcanopy

Since your just starting out with Inventor, you might want to check out these free tutorials:

 

http://www.youtube.com/user/TEDCFPublishing?feature=mhee

 

I think they might help you out!  If you have any questions about training for Inventor, feel free to contact me.

 

John Koop
Software Engineer/ Inventor Specialist
TEDCF Publishing
www.trainingtutorial.com
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JDMather
Posts: 26,185
Registered: ‎04-20-2006
Message 7 of 11 (306 Views)

Re: Beam is becoming skewed/distorted in assembly

05-01-2012 02:02 PM in reply to: ACcanopy

ACcanopy wrote:

 I would love to attatch a file but we have an elevated confidentiallity contract and i cannot post any business work on here. Believe me i wanted to be able to show exactly what is happening.....


 

Do you have a home computer?

Can you download a 30-day trial and make something up that exhibits the same behavior that you are seeing in your proprietary work.  It is much easier to communicate with actual geometry files.

 

Please mark this response as "Accept as Solution" if it answers your question.
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7997redtail
Posts: 4
Registered: ‎01-11-2013
Message 8 of 11 (73 Views)

Re: Beam is becoming skewed/distorted in assembly

05-21-2014 10:25 AM in reply to: JDMather

A couple of points.

 

I am a school teacher and this is the first year we have had this "crooked" views problem.  We, meaning the kids and I have two solutions of which the second is by far the best.

 

Before I get to the solution I would like to point out that the first part put into an assembly is not always grounded.  Or, in our case, its never grounded.  Anyone know why not?  All other years it has been so i think maybe the installers have changed something.

 

As for the solution, the one above, constraining to planes, works well but not always.  If the planes show up in "red" when you go to select them it will work.  If they show up in "White" you won't be able to select them.  We have not been able to figure out why they are white sometimes and red others.  Anyone know why?

 

The best solution is to;

 

While in the assembly view

    select the "view" tab

    Go to the "navigate" section on the far right

    Choose the "look at" option

    Select the face of your object you want to be the front.

        The object will rotate into a square view facing you

 

    Right Click the view cube

    Choose the option to set the current view as front view

 

Go back to your drawing and the view will be correct and straight.

 

Hope this helps.

 

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blair
Posts: 3,934
Registered: ‎11-13-2006
Message 9 of 11 (60 Views)

Re: Beam is becoming skewed/distorted in assembly

05-21-2014 11:39 AM in reply to: 7997redtail
ADSK added the ability upon placement of the first part by RMB when placing the part brings up a dialogue box that allows you to rotate the part about a number of axis as well as the option to Ground at Origin. You can over-ride this within the Tools>Application Options>Assembly>Place and Ground first part at Origin.
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kstate92
Posts: 895
Registered: ‎05-09-2005
Message 10 of 11 (46 Views)

Re: Beam is becoming skewed/distorted in assembly

05-21-2014 01:04 PM in reply to: blair

Maybe it's just me, but I swear both this option (Ground at Origin) and Do Not Edit Placed Dimensions in idws occasionally become unchecked on startup, even without an iPoof (crash) having happened.

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