Computerized sewing machines have a set of sensors which move the various components of the machine into place to help work on a particular design.
It adjusts the work area to be precise and in place. The same goes for the needle of the machine as well.
All you need to do is provide the necessary material and the machine will be guided into creating a pattern with the program that has been loaded. When needed the computer on the machine, will prompt you to replace thread or change color, and similar other instructions.
This kind of sewing is definitely far more complex than regular manual sewing that has been the norm till now. However, with time and an improvement in technology, everything moves towards being user-friendly. Such computerized machines, including brother cs6000i ensure accuracy of a stitch and bring to life patterns that may have been much more difficult to manage if done manually.