Something strange is going on. When I turn on view->hidden geometry I see the same as @Box showed. But I can also reproduce the double face issue by drawing the edge.
When I brought the section of geometry I Boolean out this little part from a much bigger part and so SU drew those hidden lines in when i intersected a plane to cut out the rest of the model. I have since removed and cleaned the angular lines even though the surface was still technically flat. But the problem of duplicate faces still persists.
SU Modeling Issue.skp (165.4 KB)
Those lines shouldnāt stay, it suggests to me that something is out of alignment, which would also cause the double face.
Itās very strange, doing nothing more than moving the group to the origin removes the extra face creation.
All i did after seeing what you sent was turn on hidden line and then erase them away. No face disappeared and the surface remained flat. I have noticed in the past when you intersect a plane with a surface that SU decides to draw in a million little hidden lines all over the place when though the model is actually flat. I usually have erase all of them to continue to work the model. Its like whenever you use intersect SU decides to triangulate all the flat faces.
Did this start as a CAD import?
No i did not.
Thatās interestingā¦ I use imperial as that the unit of measure we unfortunately still use in the USā¦
Another reason why we in the states should be metricā¦ Imperial is inaccurateā¦
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Those hidden lines should be temporary and go away when the action completes, if the triangulation remains then there is something wrong.
I suspect it is length snapping causing it, as I mentioned earlier., and something is out of alignment.
Once you get one corner off you continue to build the error in.
It looks like you make things in large groups too, this will continue any error within the context of the group.
Iāll have to take that into account in the next modelā¦ Thanks for your helpā¦ mihai.s pointed out the discrepancies through going to centimeters and increasing the precision as centimeters is far more superior as a unit of measure than imperial feet and inchesā¦
Yes, but that is only what gets displayed. Your measurements are showing a tilde with many of them which means you havenāt set the display precision to something fine enough. 64ths for example. The tilde symbol just means the displayed dimension is approximate.
But the precision setting of the display doesnāt change the accuracy of the geometry, just how that accuracy is shown to you.
Setting length snapping on the other hand can effect the accuracy because it will want to jump to a length snap which may or may not be exactly on your endpoint.
its really strange because when i created this model initially i drew the line work flat in plan on the green and red axis and then push pulled vertically in the blue axis but somehow the geometry became offā¦ This is where I am at a loss as to the origin of the issue.
So do you recommend that i enable length snapping at something more like 1/4"or should i just become accustomed to not enabling length snapping?
Length snapping in my experience and many others serves no useful purpose.
There may well be some cases where people will swear by it, no doubt some will post here.
Leave it off until such time as you find a need for it.