Hi, I am kind of new user of Solid, and I have problems with assembly. I need to put flat part inside cylinder on specific position, but I can't do it with "Mate" option. I put the photos so you can understand better. I highlighted the face I need to connect with red.
How are the parts supposed to look after they're mated?
When I have somehing to mate to a cylinder I usually use the planes, or even make a plane to mate to. Sometimes you can use the cylinder's temporary axis, or face to relate the plane you make.