homex.g & homey.g: This file contains G-code to home the coreXY system of this printer. Because this printer is a coreXY system, the X and Y axes are linked. We recommend that whenever you home your X axis, you also home your Y axis. This is visible in these G-code files as they are both the same. Each g-code file homes both the X and Y axes. If you prefer, it is possible to separate the homing of the two axes. These files are executed whenever the Home X or Home Y buttons are pressed or when G28 X or G28 Y is sent.