I just ignore the pure basics and that one might have to learn a bit in order to understand the correct use of what is included in Sketchup…
Meaning I just expect that you already know how to create some basic forms and shapes, how to extrude them or create a solid model with a few lines to make it a cube.
Designing line by line is not really a great way but sometimes the only way to get certain things right.
Like when fixing some corner - far easier to draw those few lines, with or without tools, than to re-create it from scratch.
You just use push and pull to deal with it.
One of the first toolsets you probably need/want is the Solid Tools - allowing you merge, add, subtract one thing from another.
AS LONG AS both groups (that how Sketchup calls individual parts in a sketch that you combined) are SOLIDS.
You need those solid tools quite often, especially when dealing with complex operations.
No big deal to punch a hole through a cube, but trying it sideways through the round faces of a cylinder makes Sketchup to wonder if you know what you are doing - not supported…
You can’t even draw a proper circle on this cylinder face without using special tools…
As said, they never had 3D printing in mind and seem to not really bother to include it.
Even if you don’t need the Solid tools you quite often find out that once you need them on a complex model that they refuse to work - NOT A SOLID they just complain…
Sometimes it is an easy fix, like when a push operation resulted in the bottom face vanishing for no reason.
At other time you might have deleted a slightly enlarged bolt from a wingnut shape in order to give it a matching thread…
And suddenly you facing hundreds of faces, triangles and more that could be the problem, not to mention stray lines or unwanted faces…
Here a tool called Solid Inspector comes really handy!
It is old, far from perfect but able to find most problems and for some it can even provide an automated repair - that does not always work…
Anyway, with it you can usually find the errors and fix them in one way or another to get a proper solid.
Speaking of: How do you create a proper thread in Sketchup?
Very carefully! LOL
There is some additional tools to create spirals and such…
And it is not problem to create a face for the thread in question…
Obviously you would now simply use the Follow tool to extrude the thread face along the helix for your thread…
Then you wonder what this terrible mess is supposed to be…
Yes, even for something this simple you need additional tools, like Upright Extruder - to make sure a face won’t change orientation with the angle of the spiral…
I fusion, you just click to creat a hole, click again to give it a thread according to specs - in Sketchup you do all this manually, well more or less…
That’s just a tiny part with basic examples, happy to help out if you have a specific problem that won’t allow to get printing.
So why bother with something as bad as Sketchup is there is so many alternatives that do things far better?
Well…
Most of these, like Fusion, no longer provide or support any of their formerly free versions.
Others come with a rather large learning curve or might be based on concepts like Scad uses.
Let’s start with why or where Sketchup should NOT be used:
Anything organic is a true pain to create, especially if you also need to cut and trim things.
Making a sculpture in Sketchup ? Just forget about it and use Blender or such…
Need actually round shapes, like a ROUND hole of just 3mm? Good luck…
And with STL the only working export format for 3D files that our slicers understand you just don’t want models that are 20 or more mb in size…
On the other hand Sketchup is perfect if you want SMALL files.
You might have noticed that there is a lot of seemingly simple STL files out there that come with an insane triangle count.
Usually the result of people working with programs that are meant to create things for literally any other purpose than 3D printing.
Or the result of cutting and merging STL files with a program rather than doing things with the original files in the proper program.
Being able to create a true arc is great, even better if you can export things as a STEP file or such…
Do you need this level of accuracy in all cases ?
Don’t know…
All I know is that in most cases the real world difference between a 8mm hole printed as a true arch or as a 24 sided STL source can be ignored…
1.04mm for the straight lines connecting the 24 corners…
If you use 360 sides the largest difference, from the middle of the 1.04mm line is about 0.034mm - well within the margin of error in terms of printer and filament calibration…
Just factor this in and you still get holes that are more than round enough…
So if you are a user and do struggle then feel free to reply and I see what I do 