It is a common misconception that printhead travel movement speed (i.e. 60 mm/s) is the limiting factor when printing. However, it is extruder volumetric (or mass) flow rate that is the true limiting speed in most conditions. It is not easy to be able to exceed 9 mm^3/s (PLA) and 12 mm^3/s (Higher temp materials like PETG, ABS) except in special cases. To calculate flow rate multiple head speed, layer width, and layer height. For example: 45mm/s movement, 0.3 mm layers and 0.5 mm wide would be 6.75mm^3/s.