0103 Blender things not to do for 3D Printing on object side Copy Video Lecture | Learn 3D Modelling: The Ultimate Blender Guide - Software Development

all right now we looked at all the
problems in component land let's look at
object land let's add a mesh cube to the
scene this volume will print its normals
are facing all out therefore it is a
good part the part is only two
millimeters by two millimeters by two
millimeters these are things I can say
shift B to duplicate it these two
surfaces are two different volumes
volume one has components volume two has
components they both two millimeters now
if I wanted them to print together I
would have to join them so they share
components object join now if I hit tab
you can see the components on both of
them therefore they're sharing
components notice that the dimensions
now are two by five by two because the
two are so the measurements across the
two volumes are dictated across the
whole entire span even the space in
between the two so when you when you go
like this the measuring becomes a little
bit harder when they're sharing
components and being to separate volumes
now volume one if it clashes into volume
two like this that's totally legit it
will print here it will print there it
will print even the gliding geometry
that's occurring here is it good in 3d
printing fine works out well I'd done it
a million times no error messages will
occur using this method the only time
you have to worry is if they're not
sharing components and then you don't
have to worry about it everything else
is pretty fruit you know pretty well
free game there's things that you cannot
do let's say if I went to print this it
will not print correctly because object
one is here and there is a space between
here in the open area down below so
this would have to have some kind of
supporting geometry it's called another
thing that's really bad to do is let's
say I went to go print something an
object one was just a little bit below
object two like this so in this case
when it went to print you wouldn't print
the first layer for this object right
here it would only print the first layer
for this one therefore it would start to
sag and have no supporting geometry here
so if you want to share a nice flat
level plane I've always found this
method to be good let's say I have this
one above that one I can hit tab to get
into edit mode go to the versi grab them
all and then hit R and scale them till
they're absolutely flat and then
reposition them back where they were so
there we go so really only one thing you
have to worry about is that the other
thing you have to worry about but it's
breaking the first laws is let's say
when a volume has normals that are
facing in different directions
that's bad no matter how many things you
have joined together if you have one
volume in that that joined group and
it's bad the whole parts bad so always
check your normals always keep back face
culling on and you should be good to go
now the whole parts back good alright
that's it for object now let's go on to
other things