i need to convert an .edrw (solidworks) to .dxf or .dwg

Is there no "export" command with a DXF file type option in Solidworks?

You can convert a SLDDRW 2D to DWG, it's just a "save as" XXXXX.dwg ( you choose the DWG file type in a list ).
It's recommended to do this "trough" a "transfer file" that will automaticaly transfer the different lines with your color, name and line type.
 
From SLDPRT and SLDASM 3D to DWG 3D you should do a "save as" XXXXX.sat with the option release 7.0 ( recommended ) then in AoutoCAD you have to "import" the XXXX.sat in a new file.
 
It is possible to reuse a DWG file to create a "sketch" in SLD :
In SLD, file, open ( choose XXX.dwg in a list ), choose the option create a new SLDRW + import in a new part.
 
From DWG 3D to SLD it's also possible directly by an "open" XXXXX.dwg.
 
Ask for more...