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Probleme purge Print Core BB0.4 (UM3)

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J'ai un problème avec mon UM3 + CURA 2.4

Lors du lancement d'une impression, la machine purge la buse AA0.4 => Jusqu'ici pas de problème.

En revanche après quelques couches, la machine chauffe la 2e buse et purge celle-ci (PVA).

C'est ici que se pose le problème : Apres avoir réalisé son "pâté" de matière en montant progressivement son Z, la machine redescend et plonge la buse dans la matière. Toute la matière forme une boule qui reste collée à la buse, ce qui implique des problèmes lors de l'impression (arrachement de la pièce en cours d'impression etc)

Petite précision, je n'ai pas besoin dans ce cas d'impression d'utiliser la 2e buse (je n'ai pas besoin de support. L'UM3 ne devrait donc pas activer ce print core)

Merci d'avance pour votre aide !

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