Machine and procedure for making small multi-faceted components for watch faces has electronic system for automatic monitoring of workpiece movements

The machine, in which a workpiece is moved relative to a tool, e.g. diamond-tipped, that shapes its facets, has the relative displacements of the workpiece and tool (2) monitored automatically by an electronic system (6). Each workpiece is mounted on a carrier (4), with the electronic system able to determine the positions of different workpieces independently of one another and of the carrier as they are moved in plane along at least three axes perpendicular to the movement of the tool as it is driven by a motor (21). The movement of the workpiece carrier is provided by a turret (9) with stages (92, 94, 96) rotating about different axes. Procédé de fabrication d'index de cadrans (3) et de pièces similaires comportant une face supérieure convexe, comprenant les étapes suivantes:Déplacement motorisé de la pièce à usiner (3) relativement à un outil de facettage (2),usinage d'au moins une facette (30-33) sur la face supérieure de la pièce au moyen dudit outil (2) se déplaçant relativement à la pièce (3).Les déplacements relatifs de la pièce (3) et de l'outil (2) sont contrôlés automatiquement à l'aide d'une caméra et d'un système de commande numérique.