I am new to blender and this might be a duplicate thread, so please point me to a similar question because I don't know the right vocabulary to formulate my question.
I try to make a screw thread with a circular profile. So I create a cylinder and next to it a circle. I use the Screw modifier to create a spiral around my cylinder.
Now I have the problem that I can not unify my thread with my cylinder. Normally I use a Boolean modifier and operation Union to do so. This time it complains.
What I recognise is, my thread is not a solid object but actually more like a pipe. I can see an opening there and I wonder if this is the reason.
I tried the Solidify modifier but this didn't help ether.
In general the spiral and the cylinder are touching each other, so I don't really see the problem. Hope somebody can point me to a solution. Thanks in advance...
By the way, I want to print this screw in a 3d printer. So in general these objects needs to be solid or so :-)
So here is an image of my result so far. I guess the boolean is not working because of this "pipe". It is not a solid object but only vertices. How can I make it solid so I can unify it with my cylinder.
When I then try to boolean unify both I get the following error. This happens also when I select the cylinder first or the circle first.