An STL file is the only file type that is compatible with 3D printing software. To convert a SolidWorks part to an STL file, take the following steps:
First, make sure that your completed part is open in SolidWorks.
Next, click on File- Save As.
Choose a location to save your file. Name the file and choose STL (*stl) from the Save as type drop down menu.
The below message will appear on the screen. Select Yes.
Your STL file is now saved and is ready for use with your 3D printing software.