The invention relates to a sanding assembly including a sanding device (100) comprising a plate (110) for supporting a sanding disk (10) and motor-driven means (140) suitable for moving the supporting plate (110), characterized in that the supporting plate (110) comprises two notches (114, 116) distributed angularly along the periphery thereof, a first notch (114) for engaging with a positioning module (200) and a second notch (116) for engaging with a pulling jaw (400), and a module (500) for verifying the presence of the sanding disk.