Good bed adhesion is one of the most important facets of 3D printing. When your print properly adhered to your bed you can sit back and relax while your print finishes. At the same time, when it does not adhere properly you are guaranteed of a fail. So, how can you ensure good bed adhesion? A few ingredients are important.    1) Bed leveling.  Make sure your bed is level, and the space between your nozzle is not too much and not too tight.  An Ultimaker 3 has active leve