The 3D printer does not provide any feedback about how much plastic actually leaves the nozzle, it’s possible that there may be less plastic exiting the nozzle than what the software expects (otherwise known as under-extrusion). If this happens, you may start to notice gaps between adjacent extrusions of each layer. To test whether your printer is extruding enough plastic or not is by printing a small 20 mm tall cube with at least 3 perimeter outlines. At the top of the cube, check if you see 3 perimeters is strongly bonded together or not. If there are gaps between the 3 perimeters, then you are under-extruding. The first thing you want to verify is that the software knows the filament diameter that you are using. Please see to that the diameter of the filament you use is 1.75mm.