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Newb questions about multiple extrusions and choosing output (by Dom d)
Hi,

I'm working on designing pieces of a container (to be laser-cut).

I extruded a rectangle and created other (difference) extrusions to cut out features. If I select g018-extrude I can see the center cutouts. But oddly those are no longer there if I select later groups. Is this intended behavior? None of the later extrusions add material so I don't know why the cutout disappears.

Also, I'd like to output a 2d projection of the side. I tried hiding points, edges etc. but if I export 2d View as pdf I still see points, and the cutouts at the edge of the extrusion still have lines on the exterior. Is there a better option for getting a 2d printout of the final object?

Thanks,
Dom
Tue Sep 26 2017, 00:12:13, download attachment dominion cutout.slvs
(no subject) (by Jonathan Westhues)
g00c does a step and repeat translate of g00b's solid model, and that's what undoes your cutouts. That's not a bug, but it's not very good either; I didn't design the groups with much attention to what happens if you reorder them. You want to translate g018 instead, since that contains the cutouts.

Are you trying to export 2d vector art suitable for laser cutting? If yes, then use Export 2d Section, not View.
Tue Sep 26 2017, 03:08:47
(no subject) (by Dom d)
Thanks for the reply. "Export 2d Section" looks good (even without fixing the other issue).

Hmm I guess I don't understand what you mean by "g00b's solid model" - g00b only contains 4 lines for a small rectangle on the side (plus some construction lines). When translated those shouldn't overlap with the center cutouts anywhere. When translated and extruded I'd think they'd only remove extra material.

Not clear to me why g00c (translation of g00b) leads to the center cutouts being solid again. Do I need to keep things 'more linear'? I made g00b and g015 relatively early sketches because extrudes were slowing the UI down and I figured it was safe to keep them early since they didn't depend on later geometry.

My attempted workflow was 'design all 2d elements then go back and extrude desired groups once happy with everything'
Tue Sep 26 2017, 12:31:07
(no subject) (by Jonathan Westhues)
We usually start with the solid model for the group before the current group. With step and repeat, we start with the group before the group that's being stepped and repeated, so you lose all changes made after that.
Tue Sep 26 2017, 13:25:12
(no subject) (by Dom d)
Oh, I think I see then.

It is a bit weird that the sketch elements persist but the extrudes are lost. I can see a use case for allowing sketches in between X and translate(X) since its elements could make X messy but may be needed in translate(X).

It's also weird that the 'lost' extrude still shows up in the 2d section export, but in my case that's a pleasant surprise.

Thanks for the help!
Tue Sep 26 2017, 14:18:15
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