Realization of surface roughness intellective marking in AutoCAD

Aimed at the lack of function of surface roughness marking in AutoCAD available,the self-marking of roughness on engineering drawings in the environment of AutoCAD was realized by using secondarily developed software package built in AutoCAD and its strong and quick development environment provided by AutoCAD ActiveX automation.The style,scale of symbol and the value selection of surface roughness are realized.It has been proved that this design was intellective for roughness marking accordance with the national standards through automatic calculate.