Trouble splitting a solid with small edges

SketchUp
1

I’m trying to split my model into parts that can be laid flat on a 3D printer with max 45 degree overhang. But the parts become not solid and I can’t understand why. I tried using solid tools (intersect/subtract) but the part just disappears. So I ended up using a rectangle to intersect faces, doubled the object, then erased the opposite parts, and drew edges to close the separated parts. I finished with the solid inspector 2 to repair any issues. SketchUp says one part isn’t solid even though the solid inspector extension says it is.

The original part with the rectangle to split:

Screen Shot 2022-06-14 at 9.37.38 AM
Screen Shot 2022-06-14 at 9.37.38 AM3094×764 138 KB

After splitting:

Screen Shot 2022-06-14 at 9.42.15 AM
Screen Shot 2022-06-14 at 9.42.15 AM2662×1328 183 KB

Screen Shot 2022-06-14 at 9.42.23 AM
Screen Shot 2022-06-14 at 9.42.23 AM2674×1160 152 KB

Those little edges are a nuisance and I don’t understand why they are all needed since the split face is flat. (If someone can help me understand this I’m sure it would also help for the future.)

2

Are you still using SketchUp 2018 as indicated in your profile?

From your first screen shot it looks like there’s some bad geometry before the split. If I needed to do that I would make a component of the entire thing, and use The Dave Method for editing it to split it.

3

It would help if we could see your model.

4

I just Googled the Dave method… and scaling larger worked. I’ve seen this before, and was therefore deliberately working at a larger scale while modelling, so didn’t think it was this again! Go big or go home I guess…

Thank you!!
I just realized I am speaking to DaveR from the Dave method! :slight_smile:

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