Surface thickness is 0 yes?

Rhino Rhino for Windows
1

does a surface have no thickness unless it is extruded?

this may be a cam question, but i have two mating parts that are made of three surfaces that make a pocket and receiver that should fit into the pocket. i made the pocket first, then just rotated it 180 degrees to make the surface i could cut for the part that is supposed to fit into it. the parts don’t fit well at all and i have checked cutter diameter and comp settings in rhinocam and do not see an error.

i’m asking here as there doesn’t appear to be a good community for rhinocam. i ran the same surface in my old mastercam and got slightly different but similar results.

if need be i can upload a file, i’ll just have to make it smaller as it includes lots more details that are unrelated.

2

here’s the file. pocket is on the left, right end is open. when i cut the red surface on the right the flat on the top of the part is wider than the flat in the pocket, like i had cut it with a smaller tool than programmed for.

trap mate.3dm (163.0 KB)

3

these two parts are identical in Rhino… the error is happening somewhere else further down the line… i’m not sure where and i don’t use any of the additional softwares you’ve mentioned.

i don’t think it will change anything in CAM but the individual surfaces making up each part would generally be Joined together as a polysurface

edit-- but to answer the thread topic title…
yes, surface thickness is 0.

4

thanks, i suspected so. have not run into this before with nested parts.

any other rhinocam users here?