first of all I wanted to put my topic in the “Parts issues”-category, but its locked. So heres my problem:
I have calibrated all my axis and my extruder and my prints are pretty nice. If I print a specific length on the X-, Y- or Z-axis the prints are the exact same length as they should.
However, if i would like to print an object with a hole (it doesn’t matter if its round or square), it is smaller than it should.
E.g I wanted to print a cube with a hole in the middle with a diameter of 8mm. In the printed object the hole is only 6.8mm in diameter.
It’s a slicer issue : circles are drawn as polygon meshes :
So all curves are actually segmented polylines and a polygon always has smaller area than its enclosing circle.
Other causes :
when making a turn you get more material in the interior side than the exterior side (filament is squeezed and the next point comes into play).
filaments tends to cut corners when path turns.
if you’re extruding too much filament or if it’s too hot it will spread on a wider area (correct values for PLA : 190° and 75% flow).
