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I have created a 1" cube in Autodesk Inventor Pro. I have saved the file as a .stl file. When I load the file to Cura 15.04.6 size is much, much smaller than 1" cube in the Cura print window. I am unable to find a way to scale it back to the 1" measurement desired. How do I fix this, oh, 3d printing gods?

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Well you have a bunch of choices.  Cura expects the units of the STL to be in mm.  Not inches.  But STL files are unitless.  So one solution is to design a 25.4 inch cube (which will come out as 25.4 mm which is one inch).  A second option is that when you save to STL, most cad programs ask what unit you are exporting in.  Tell Inventer Pro that you want the STL to be in mm.  This is probably the best solution.  Finally, in cura you can simply click on the tiny 1mm cube and scale it up by exactly 25.4X (2540%) or you can tell it to set the height (or any of the 3 dimensions X,Y,Z) to 25.4mm.

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Another solution is to make the design in metric dimensions from the start. In the future, engineering in the USA and UK will switch to the international metric system anyway. They are about the only countries that are still behind. So if you do the switch now, you will have a very gradual and smooth transition, and you will be used to it by the time it becomes compulsary. Once you are familiar with the metric system, you won't regret it, because it is so much easier to do conversions. No more horrible multipliers to go from inch to feet to yard to miles to nautical miles... Just move the decimal point a couple of places, that's all. Idem for volumes and most other units.

 

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If you want to do the scaling in Cura, there's a neat plugin for that (aptly called the "Barbarian plugin"). It is available through the "Plugins -> Browse plugins..." menu in Cura 3.x.

Edited by ahoeben

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