Inconsistent Relationship

[Anonymous]

Hi there,

As you can see in the attachments that the Tube has inconsistent relationship with other parts. I tried to resolve and recover the issue but I couldn't find the cause.

Would you please, tell me where is my fault and what is the reason.

Regards,

atajabbas

Inventor

[SBix26 · Accepted solution]

Very simple: your assembly is over-constrained.  You have placed the Forward Cowling Holder and Instrument Panel Holder in a fixed relationship to each other (no relative degrees of freedom), the attempted to constrain the cross braces to those two pieces by mating their hole axes.  Unfortunately, the spread of the brace tube holes is exactly 26.257 inches, but the spread of the holes in the mating parts is 26.257077141 inches, which is not the same.

I recommend that you delete all the constraints and proceed like this:

1. Ground at origin the Forward Cowling Holder (Assembly Tab > Productivity panel > Ground and Root Component)
2. Place and orient the Instrument Panel Holder somewhere near where you want it to end up
3. Constrain the IPH bottom face flush to the FCH bottom face
4. Place the two brace tubes, and constrain their work planes properly to the bottom face of the FCH
5. Constrain the hole axes of the brace tubes to the other two parts.  This will remove all degrees of freedom without causing conflicts

Note that you neglected to ground or constrain any of your components, which doesn't help.  But the fundamental problem is simply double constraining when the dimensions don't match exactly, to at least five decimal places.

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Sam B
Inventor Pro 2020.1.1 | Windows 7 SP1
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