I'm importing an OSM map into ARCMAP, after this i use the function export to cad. However when I open the dwg in Autocad, the file is stretched a bit so the proportions is wrong. Does anyone know how to solve this?
It sound to me like you are having projection issues. OSM data is in WGS 1984. Make sure you set ArcMap, or the environment export settings during conversion to CAD, to something your CAD system actually supports. If the exported CAD file is in a coordinate system your CAD system doesn't support, it may show up stretched or deformed compared to other data, as you experienced.