Like the Cartesian printers, the CoreXY design also has latitudinal and longitudinal coordinates determined by two motors and toothed belts on the Y and X axes, and the print height determined by the Z axis. The difference of the XY Core is that the X and Y movement is dependent on each other, made by a very specific belt design. The printing surface, in this case, will be raised to meet the extruder. Note that not only the mobile printing plan characterizes a CoreXY printer. The trait that defines the printer type is the design of the XY belts and their movement.
Because the X and Y axes are much lighter, faster prints will not have artifacts that can appear on fast prints on Cartesian printers. The design also allows to have a much larger percentage of its total volume as a construction volume, since it is not necessary for the print surface to move sideways.
The belts used in CoreXY printers are much longer, which makes any belt problem more important than Cartesian printers. Their complicated path also makes these problems more difficult to repair. The frame must be very stable and perfectly square, otherwise the dimensional accuracy will be less.