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Posted · problem with feeder or with PTFE coupler ?

Hi,

I have problems with the feeder: after a while, no material comes out of the nozzle. The filament is no more driven by the feeder. As suggested, I made atomic method, I cut the damaged filament each time I get this problem.

The vendor's support department  told me the problem comes from the PTFE coupler.

I would like to know if such a PTFE coupler needs to be changed; it does not appear distorted:

IMG_20160720_153201.thumb.jpg.e028f3f8ae9015acb8a5d7164b07f94e.jpg

My UM2 is new, and has worked during only  80 hours.

Moreover, this problem appeared after a few hours of work, when the PTFE was quite new.

Thanks for answer.

IMG_20160720_153201.thumb.jpg.e028f3f8ae9015acb8a5d7164b07f94e.jpg

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    Posted · problem with feeder or with PTFE coupler ?

    Merci de ta réponse.

    Comment reconnaître si le PTFE est mort ? il ne parait pas déformé ! J'ai lu sur les forums qu'un PTFE avait une durée de vie de plusieurs centaine d'heures. Or mon UM2 a moins de 100 heures de travail (j'estime à 80 heures).

    Faut-il conclure que si la matière ne sort pas de la buse, on fait un "nettoyage atomic", et si le problème persiste, on change le PTFE ? cela me parait difficile de démonter la tête toutes les 80 heures !

    C'est le support de Makershop qui m'a dit qu'il fallait changer le PTFE.

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    Posted · problem with feeder or with PTFE coupler ?

    Comment reconnaître si le PTFE est mort ? il ne parait pas déformé ! J'ai lu sur les forums qu'un PTFE avait une durée de vie de plusieurs centaine d'heures. Or mon UM2 a moins de 100 heures de travail (j'estime à 80 heures).

     

    Dans un premier temps tu peux jeter un œil sur ce graph pour te faire une idée de la durée de vie de ton isolateur en fonction de la température d'utilisation :

    5a331f4ce301a_UsurePTFE.thumb.jpg.800b3713b9fab4b988435ce4c5db243e.jpg

    Donc comme tu peux le constater plus tu utilises une température haute plus ton PTFE se dégrade vite.

    Une vision sur plusieurs centaines heures d'utilisation à 250 ° :

    PTFE.thumb.jpg.93df645d4996f11199ab5b81cf0d3d2c.jpg

    A partir du moment ou il commence à brunir tu peux considérer qu'il est bon à changer et oublies la déformation car à ce moment là il est déjà beaucoup trop tard.

    Pour la durée de vie c'est variable, mais en gros tu peux tenir 3000 heures à 200 ° et 1000 heures à 250°.

     

    Faut-il conclure que si la matière ne sort pas de la buse, on fait un "nettoyage atomic", et si le problème persiste, on change le PTFE ? cela me parait difficile de démonter la tête toutes les 80 heures !

    Oui c'est les étapes, lors de l'apparition de la sous extrusion, dans un premier temps méthode atomic suivi du changement de PTFE si le problème persiste. Sous réserve d'avoir des paramètres d'impression raisonnables.

    Donc vu ta photo je peux te dire à 100 % que ton Ultimaker n'est pas neuve et pour le savoir tu vas sur ta machine dans " maintenance " --> " Runtime stats "

    5a331f4ce301a_UsurePTFE.thumb.jpg.800b3713b9fab4b988435ce4c5db243e.jpg

    PTFE.thumb.jpg.93df645d4996f11199ab5b81cf0d3d2c.jpg

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    Posted · problem with feeder or with PTFE coupler ?

    1) you have the older style teflon part there. The newer teflon lasts much longer and is more translucent. So definitely replace it. You can get them from 3dsolex.com or from Ultimaker.

    2) Just because it looks good doesn't mean it is fine. You have to put quite a bit of pressure on it and see if the opening closes up a bit.

    3) 80 hours is pretty short time to destroy it - were you printing hotter than 220C?

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