Reproductive Robot

The most difficult part of a self-copying robot is the chip. The goal is not a robot producing another one every day, but rather in couple of years. Therefore, it may be possible to have a small production line in the belly of the robot that does PVD, CVD, and etching and maybe producing one chip in 6 months.

Of course the process requires big machines and vacuum chambers, so one robot probably will not be enough. Then comes the concept of "robot sex". Six to ten robots will have "sex" or combine in series in order to produce the chips. The robots will have different "genders", like the "vacuum chamber", the "plasma robot", the "etcher", etc. Once these ten get together, they can produce the chips necessary to create a new member.

These robots probably will not look quite like humans so they will not be able to blend in. Then again, you can make them look cute or nice, or monstrous; whatever you want the new species to look like. Personally would like them to look like T-X but in larger size.