Surface Roughness Detection of Precision Manufacturing for Spacecraft Instrument Using Micro-EDM

The demand for high attitude measuring accuracy promotes the key instrument manufacturing method. The Micro-EDM manufacture technique has lots of advantages in instrument surface machining. The surface roughness sensing and imaging is able to provide input to assessment. This paper designs a scheme of surface roughness imaging. The actual experiment results show that the method presented here is able to obtain the precise image of instrument surface.