Having Problems with Assembly Constraints

[Anonymous]

I am attempting to assemble and align two parts, using constraints. One is a firewall, onto which a motor mount will be attached. Both parts have four bolt holes that will lock them together (in real life). I am able to constrain one of the bolt holes using a centring constraint, but I cannot constrain any of the other bolt holes! Getting error messages saying the constraint cannot be solved. The distances and diameters are exactly the same. I've uploaded one .iam and two .ipt files. Once you see the parts, it should be self explanatory as to what I'm trying to achieve. Any suggestions to solve this would be appreciated. Thanks, in advance.

[mcgyvr · Accepted solution]

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@Anonymous wrote:

 The distances and diameters are exactly the same.

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Nope..

Motormount is 1.692913000 in

Firewall is 1.69300000 in

[JDMather]

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@Anonymous wrote:

..... it should be self explanatory as to what I'm trying to achieve. Any suggestions ....

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I recommend that you use Equal (=) constraints and Symmetry rather than duplicated dimensions.

You might be less likely to miss dimension errors if there are fewer dimensions.

[Anonymous]

Thanks to both of you..... I see my error.

Yet, my confusion is this: in both cases, the dimensions were typed in (to 3 decimal places only), and then intersection snaps (with the points going green) were used to create the bolt hole positions. How can there still be errors? Oh well, I won't worry about it, but will use your advice of using constraints and symmetry. And I will check and recheck dimensions every time!

Thanks for your help, once again. Much appreciated.