Stratasys Tutorial - Fortus Calibration Theory

What is this thing I am supposed to read to calibrate my Stratasys 3D Printer?

This video describes the theory behind the manual calibration for the Fortus 3D Printers from Stratasys. Michael will talk about which tip is filling what function, and how the printer will make digital adjustments withing the calibration so that the printer will know exactly where to place model and support material. Calibrating your 3D Printer is essential for producing the best quality parts, and our goal with this video is to help remove some of the mystery of the calibration process.