Un nouveau challenge pour Arts Tech Makers !
Une réglette de calibration pour un accélérateur de particules Elekta.
Une difficulté de cette impression c’est la nécessaire précision de la position des repères de calibration : 0,05 mm (millimètres) de tolérance !
Il s’agit de trous hémisphériques où se logent des billes de plomb de 1,5mm de diamètre, servant de repère lors de la calibration.
Une autre difficulté : la bande verte sert de repère pour la réflexion de lumière, elle fait 23 cm de long sur 0,45 mm de large et est insérée à 0,3 mm de profondeur ! De plus elle est en PLA Fluo pour mieux renvoyer le faisceau lumineux!.
Les évidements recevront, quant à eux, des aimants super puissants pour pouvoir positionner la règle sur tous les axes de l’accélérateur.
Il y a enfin 4 trous de 1,2mm de diamètre qui serviront à positionner parfaitement la réglette sur les rayons laser.
Pour améliorer la réflectivité de la règle nous avons utilisé une fonction de lissage sur la couche supérieure qui permet d’effacer complètement les lignes de la buse mais qui augmente très largement le temps d’impression puisque il faut près d’une heure trente pour la dernière couche.
Le résultat est très beau et répond parfaitement au cahier des charges du client, un centre expert en radiothérapie !!
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