I found on YouTube tutorial about drawing cycloid rotor. It is piece of cake for the Blender but very difficult to do on CAD. Can I do it on Blender and transfer to CAD. I tried STL. but no luck.
Many CAD/CAM packages prefer "solid" objects, not the lighter weight mesh files usually exported from Blender. STL is common in additive manufacturing - hence there are many work flows that will convert STL to either STEP/STP or IGES. OBJ files are also common for conversion, and many packages allow their import. Check the Import types for your Application, then export/convert accordingly. I have many times used STL to STEP converters - then cleaned up in CAD. Hope this helps. Good luck.