Inventor General Discussion

Inventor General Discussion

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*A., Kirk
Message 1 of 4 (562 Views)

Difference between Symmetric constraint and "mirror"

562 Views, 3 Replies
11-15-2002 01:12 AM
I have ran across this from time to time. Here is the scenerio. Say that I
have two points/circles with line dividing the two. I then chose to add the
symmetric constraint, but get an error "adding this constraint will
overconstrain the sketch". I don't understand why I get this. The two
points/circles have no other constraints on them.

The only way that I can get the two holes to be symmetric about the line is
to delete one of the holes and then do a mirror about the line.

Any ideas on why Inv. works this way? I am sure that it is something that I
am overlooking, but it seems that if there are not any constraints on the
points, adding the symmetric constraint should work.


--
Inventor 5.3 sp2 / V6.0 sp....
Win XP Pro
P4, 2 Ghz, 512M
Gloria II-64
nVidia v6.13.10.4041
1280x1024, 32 Bit
*Caldwell, Larry
Message 2 of 4 (562 Views)

Re: Difference between Symmetric constraint and "mirror"

11-15-2002 01:25 AM in reply to: *A., Kirk
Are the circles dimmed, maybe? Mine works okay.
~Larry

"Kirk A." wrote in message
news:E9054786F3ACE44A67456F9C70DE17D3@in.WebX.maYIadrTaRb...
> I have ran across this from time to time. Here is the scenerio. Say that
I
> have two points/circles with line dividing the two. I then chose to add
the
> symmetric constraint, but get an error "adding this constraint will
> overconstrain the sketch". I don't understand why I get this. The two
> points/circles have no other constraints on them.
>
> The only way that I can get the two holes to be symmetric about the line
is
> to delete one of the holes and then do a mirror about the line.
>
> Any ideas on why Inv. works this way? I am sure that it is something that
I
> am overlooking, but it seems that if there are not any constraints on the
> points, adding the symmetric constraint should work.
>
>
> --
> Inventor 5.3 sp2 / V6.0 sp....
> Win XP Pro
> P4, 2 Ghz, 512M
> Gloria II-64
> nVidia v6.13.10.4041
> 1280x1024, 32 Bit
>
>
*Maenpaa, Mike
Message 3 of 4 (562 Views)

Re: Difference between Symmetric constraint and "mirror"

11-15-2002 01:27 AM in reply to: *A., Kirk
I just tried it, with no problems. Do you have dimensions on both holes?
Maybe, you can post your file to CF.
Mike

"Kirk A." wrote in message
news:E9054786F3ACE44A67456F9C70DE17D3@in.WebX.maYIadrTaRb...
> I have ran across this from time to time. Here is the scenerio. Say that
I
> have two points/circles with line dividing the two. I then chose to add
the
> symmetric constraint, but get an error "adding this constraint will
> overconstrain the sketch". I don't understand why I get this. The two
> points/circles have no other constraints on them.
>
> The only way that I can get the two holes to be symmetric about the line
is
> to delete one of the holes and then do a mirror about the line.
>
> Any ideas on why Inv. works this way? I am sure that it is something that
I
> am overlooking, but it seems that if there are not any constraints on the
> points, adding the symmetric constraint should work.
>
>
> --
> Inventor 5.3 sp2 / V6.0 sp....
> Win XP Pro
> P4, 2 Ghz, 512M
> Gloria II-64
> nVidia v6.13.10.4041
> 1280x1024, 32 Bit
>
>
Active Member
mhellberg
Posts: 8
Registered: ‎01-29-2003
Message 4 of 4 (562 Views)

Re: Difference between Symmetric constraint and "mirror"

11-15-2002 05:46 AM in reply to: *A., Kirk
I've had similar issues with the symmetry constraint. I was trying to center squares on reference lines though. I ended up having to use construction geometry in lieu of the symmetry constraint. I'm also using IV5.3sp2.
-Matt
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