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Nozzle rubbing previous layers


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Posted · Nozzle rubbing previous layers

Hello everyone, I have an Anycubic Vyper, and I am using Cura to slice my files ... and on some prints, mostly taller thinner prints like say a helmet ... you can hear the nozzle rubbing on the previous layer making like a grinding noise as it rubs across the filament that it has already layed down. It doesn't seem to affect the quality of the print, but it some cases it can knock the print loose from the bed. So i am forced to use a large raft area on all prints to avoid this happening. Sometimes it will stop for a few layers, and then back to rubbing again. Although it seems fairly steady the taller the print gets.


I have only been 3d printing for a month or two, so I am totally new to the scene and have no idea where to start ... so does anyone have any suggestions as to what settings I should try and modify to stop this from happening? If i was to guess, I would say that maybe to much filament is being pushed out, and its taller then what the printer thinks it is, but is there a way to control the amount of filament that flows? 


Thanx in advance guys



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