pimpdave wrote:Science Fiction that is actually Science Fiction:  Does it always require robots?
No.
Science fiction, as I usually define it, is fiction written in an imagined setting wherein the author considers the results of possible scientific advances. Note that I say 
possible scientific advances. Settings that include items which are utterly beyond scientific possibility as we currently understand it are rightly classified as works of fantasy. This includes anything with elements of magic or mysticism as central setting elements. So 
Star Wars, while usually found in the science fiction section of your local library, is fantasy because, while it does include many elements explainable by science - laser swords, blaster pistols, hyperdrives, etc. - it also has a major setting element which is utterly unexplainable by science: the Force. 
Star Trek, on the other hand, is (at least nominally) science fiction because it at least makes an attempt to explain every unusual phenomena encountered in scientific terms.
What's really interesting to consider is how the line that defines science fiction and fantasy is in a state of constant flux because it depends on our current level of understanding. When Jules Verne wrote 
Journey to the Center of the Earth, it could have been considered science fiction because science at the time didn't know of any reason why the setting described shouldn't exist. Now, of course, we know better, so it is rightly classified as fantasy. His 
20,000 Leagues Under the Sea, on the other hand, has been science fiction from the beginning, and now is almost simple fiction. H. G. Wells' 
The Time Machine, on the other hand, was - and is - a fantasy work because current science indicates that a functional time machine is impossible. But it could 
become science fiction if our scientific understanding of several things - most notably time - were to change. In the same way, 
Star Wars could become science fiction if someone were to make a scientific discovery of an energy field created by all living things which surrounds us, penetrates us, and binds the galaxy together.
Robert Heinlein wrote an excellent book in 1952 called 
The Rolling Stones. It remains, for me, the single best example of science fiction I have ever read. It postulates certain advances in science and technology, and essentially proceeds to explore how the world would change if those advances happened. Check it out sometime - it's a great book.
Ah, but I'm rambling away from the original question.  

  Robots are often found in science fiction, primarily because, given our current scientific achievements, we find it very believable that sometime in the future, there will be advances in technology that make robots a common part of life. But the presence or absence of robots does not determine whether a work is science fiction or not.