Why is the filament constantly breaking iside the feeder when I paid them to assemble the machine and have only ever used their filament? And what can I do about it?
 
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Why is the filament constantly breaking iside the feeder when I paid them to assemble the machine and have only ever used their filament? And what can I do about it?  

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Bill
 Bill
(@bill-14)
Mitglied
Why is the filament constantly breaking iside the feeder when I paid them to assemble the machine and have only ever used their filament? And what can I do about it?

Have a new Prusa Core One Plus. Started using it about a week ago. Only ever used the Prusa filament (PLA Galaxy Black) that came with it, and not even half the roll yet. And the filament keeps breaking inside the feeder assembly. It literally broke a few millimeters outside the feed tube this last time. It was too close to grasp with pliers, due to the little plastic funnel in the feeder. So I replaced the nozzle with the spare that came with it.

But the main question I have is why? I have used other printers and never had this happen so much. This breaking in the feeder just before the nozzle tube has happened more in the last week than in a year of using a different printer by a different manufacturer. I paid them to assemble this thing so i could avoid weird little problems like this, and yet - here I am. 

 

Anyone out there have an idea where I can look? Some adjustment or maybe a slightly off installation?

 

Thanks in advance...

 

Here is a picture of the nozzle, in case it helps

 

Veröffentlicht : 10/06/2026 7:14 pm
Diem
 Diem
(@diem)
Illustrious Member

It was too close to grasp with pliers, due to the little plastic funnel in the feeder. So I replaced the nozzle with the spare that came with it.

It's usually easiest to push the short tag through the heated nozzle with a length of scrap PLA and then to pull the scrap out leaving the tube and nozzle clear.

Why is the filament constantly breaking

The commonest reason PLA becomes brittle is damp.  

There are many threads here about drying filament, even new filament is not certain to be dry - the usual packing with dessicant in a sealed bag is good for a few weeks but if left on a humid warehouse shelf for months before shipping it will need drying on arrival.

In some arid parts of the world users get away without drying PLA; where I live within walking distance of the sea dry filament can be showing deterioration before the end of a long print and if left out for a few days PLA begins breaking wherever flexed...

It sounds like you need a dryer.

Cheerio,

Veröffentlicht : 10/06/2026 9:08 pm
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