Hello, I have to give thickness to 100+ different cubical units in a fast way, when I tried the ''offestsrf" it kinda of copied the cube, it did not actually gave thickness. Is there any fast way to do it?
Hello Noor,
If you can please post the file.
Thank you,
Andy
sure, here it is
noor units.3dm (5.1 MB)
Hi Andy, I think i figured out the solution. Since I want to print it, there is no need to keep the bottom of cubical units, once I removed them and it became an object of 3 faces instead of 4, it gave the right thickness
Hello Noor,
Great. I have been offline for awhile but before such, I did download the file and got as far as to where a first impression on the to be formed [ hopefully] “to do list” was to move the objects closer to the origin. I have seen technical reasons as to why this is advantageous. So if of interest a search of the form will land you at an explanation. Presumably the model is going to be developed more perhaps even if further “development” constitutes sending the data to your printer software. If you want to / can post your fix that would be nice.
In 2019 or so the choice was made to not do the actual 3D printing and that choice [guess] has worked out.
So maybe off / not material but: A quick measure after having moved the objects toward the origin yields a distance of 1876.931 millimeters between the furthest away and on the origin object. Perhaps this is relevant, as now the objects, are within / mapped to the parameters of your printer build surface / volume and what the printer software will use as reference coordinates for it’s “world space”.
Last, I imagine you are now better off, given you do not require solid filled objects as less printer material is used and guess ? a faster print.
Thank you,
Andy
Offsetting a cube entirely is “non manifold” geometry and “illegal” in Rhino, so to speak.
Why are you doing the offset in Rhino instead of simply using slicer settings?
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as James indicated you cannot have a floating cube inside another cube. (or sphere or whatever)
you can however connect the inner and outer cube with a small pipe or other type of geometry
This will help you
I’m pretty sure Kyle is aware of that command.
It’s ONLY for people doing FEA analysis that requires weird “bad” geometry, there is no point in using it for this situation. All Rhino commands that work on solids require “manifold” geometry to work right.
Slicer settings are the way to go.
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sure, but what kind of printing are you doing?
sla or any powder printers will contain uncured resin or powder in that cavity with no way to clean it out.
extruding printers, depending on your geometry can contain supports in that cavity..
typically speaking cavities are printed in two halves and then joined in a post process.
During printing, I placed weights inside the cavity after stopping the print for a while, then started the print again and the result was a heavy plastic part. Printed with fdm printer
ah, nice…
as James said, you can do this all within the printer settings instead of futzing with Rhino’s parts.
But you do you- the right way is the way that works for you-
Rob,
I don’t know how Cura works, I haven’t user it in years, but it should not be that different than other slicers. In this case you want to export both objects from Rhino as a multi-body single file (meshed stl or step) and in the slicer software change the type for the void object from regular object to negative object. So that will prevent the outer sphere from filling that volume with infill.
In some slicers you might require to export both objects as separate files and then import them together. In some cases you even have to put a couple of coming tinny bits of mesh so the bounding box of both objects match. Otherwise they might miss-align at import. Or import only the sphere and they load a modifier file to then set it to be the negative part.
Let me know if this makes sense or I can look into it on the computer later.
G
Thank you, this is an old project. I only needed a ball I created it with NonmanifoldMerge. I did everything with the help of a Rhinoceros, without any problems.
An easy workaround is to subtract a thin hole between the void and the outside.
Yes, I used this method. I used to work a lot in Solidworks . Сreating bodies with a cavity inside is a common practice for a Solidworks. I was very surprised that this is a problem for the Rhinoceros
Hi @Rob25
Another easy way to do it in Rhino is to mesh the two parts, flip the normals of the inner geometry and then join those two meshes - and export the mesh to whatever slicer you are using.
HTH, Jakob
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