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Print with colorfabb xt very poor

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Hi Community,

since two months we have an Ultimaker 2 Extended+ in our company. I'm repsonsible for this and so i'm making trial and error with different materials and print settings. The results with ABS and PLA are good.

Now we have bought some of the colorfabb xt filament and i can't find well print settings up to now. I have uploaded some pictures from the last failed print. Do you have an idea what happens to the print and what i can change?

My print settings are in the last two pictures. Nozzle temperature 255 °C and bed temperature was 70°C. I know, the 255°C are very high. But i have printed an other small part with this settings and the result was good. With lower temperatures i became poor surfaces.






Thanks for your help. If i have anything forgotten, please ask! :-)



Edited by Guest

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@nicolinux might now much more for colorfab xt20 than me but imo carbonfilled filaments basics are:

- No fans

- Retractions to the minimum or off, and if used change retract speed to 15mm/s

- No fans

- Feeder tension should need to be relaxed since the filament it's easy to break/chew by any feeder.

- No fans

255C sounds ok and it shouldn't underextrude. Did you use anyother kind of filament before this print, like nylon, abs or so? If so, atomic clean it until you get a clean pull.

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