I have a weldment (part file attached) that contains mirrored features....
Mirror 8 & Mirror 9
Mirror 8 works correctly however mirror 9 is not right.
does anybody know where I've gone wrong?
SW 2019 1.0
Your problem is with Boss-Extrude16. You have it set to Up To Next which creates studs sticking up in the air(which may be your intent), then when you Mirror the cuts it causes issues of leaving odd bodies & slivers behind. I did Boss-Extrude16 up to Surface, then the Mirror worked correctly.
Or it will work as you have if you only select to keep the main body.
What Kevin Pymm said...
I was looking through it trying to figure out if the studs sticking up were part of the design intent, but it appears not. If you get rid of those as Kevin says it works fine.
I would of never looked at that without those pointers though.
Thanks for your help.
Such a strange behaviour of Solidworks though.
There are some situations where you would want it to extrude up into the holes as it did, so it is intended behavior, but something to be aware of when using certain end conditions. Up to next and Up to body will both behave in that manner where there is a closed cavity that can be "filled".
I use this functionality often when checking the volume of an odd-shaped tank for example. Create an extrude sketch the size of the largest area in the cavity and then extrude up to body in both directions.
so when I extrude up to next...…
It will extrude up to what ever it finds next, hence the extude 16 will fill the cavities in the upper panel??
Bingo! At first glance it seems like it would stop at the face, but it looks for the 'next' face across the entire profile of the extrude. For this type of extrude I use Up To Face most often, Up To Body second-most. I usually only use Up To next in the prototype/concept stage when I think that there may be some changes made to bodies/faces and I am trying to prevent rebuild errors while making rapid changes.
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