AnsweredAssumed Answered

self-intersecting surface

Question asked by John Kreutzberger on Mar 24, 2009
Latest reply on Mar 25, 2009 by Matt Lombard
This topic is cross-posted from the surfacing forum.

I have an imported part that I am doing a core/cavity split for. I kind of use the mold tools, but not completely. I have all of my knit surfaces for core, cavity and parting surfces in the part file but for a few reasons that are not relevant to my problem I choose to do my split in the context of an assembly.

I create my core and cavity blocks in this new assembly-then bring in the molded part and position it. I then edit the core and copy the core surface and the parting surface; knit them together and do my surface cut. No problems.

Then when I try to do a similar thing for the cavity, I get an error message when I try to offset the cavity surface by a distance of zero: resultant body is a self-intersecting surface. News to me. I go back to the part and look it over and find no problems. Then I try to offset that same surface in the part file-just for grins. No problem-no error message-everything looks fine.

I go back to the assembly and edit the cavity part and try to offset either one of these surfaces with no success. Anybody have any ideas on what is going on? A body check shows no problems, by the way.