Ultimaker S3 Fails Consistently

[Idahobie 0]

I have a new UMS3.  I have tried printing dozens of jobs.  Anything under four hours prints nicely, but it has never printed for more than five to six hours without pushing the Bowden tube out of the drive assembly. 

 

I have tried different models, different speeds, and different temperatures.

 

I have removed the Bowden tube and trimmed the end.

 

I have tried a different spool of filament.

 

The elapsed printing time is different with each failure, but never less than five hours.

 

The failure is at a different layer each time.

 

There is no grinding on the filament.

 

It will complete two copies of a single model, so long as the print time is less than about five hours, but when I add a third copy of the model to the build plate it fails.   Failure time is usually around five hours, give or take one hour.  It does it every time and with different models.

 

I'm using black Ultimaker Tough PLA with the AA .40 print core.

 

The nozzle is not jamming.  When the Bowden tube pushes out, I can manually feed the filament with my fingers and it extrudes through the nozzle with very little pressure.

 

My reseller has not been helpful.

 

Any suggestions?

 

Gordon

 

 

Edited May 3, 2020 by Idahobie
Additional information.

[Enigma_M4 123]

Hi Gordon,

 

this appears to become a very common issue, as described for example in this post:

 

https://community.ultimaker.com/topic/31389-um3-pushes-out-bowden-from-feeder/?tab=comments#comment-258034

 

The culprit seems to be the tube coupling collet (not clamping correctly?), the horseshoe clip (to flat?) or the bowden tube itself (according to the upper post: to short?)

 

Regards

[Idahobie 0]

Thanks, EM4.  

I've requested new Bowden tubes and couplers from my dealer.