I'm modeling in SketchUp and having issues printing output with correct dimensions. For example, if I download some precise model from the Internet (as a knob for music instrument) - it prints right away, I convert STL to GCODE in Cura and everything fits perfectly. But when I do model in SketchUp and convert it to GCODE in Cura at the print it shrinks model to a smaller size. Please help me figure out why my dimensions are incorrect. Thank you!
STL is unitless format. You must inform your printing software what the numbers in your STL file mean. Your downloaded STLs obviously use Cura's default units.
I have not Cura, but the problem has been in the past a blight with DXFs which didn't carry dimension units.