Feeder Problem

[qarbiq 0]

Hello everyone, hope you are all doing great.

I own 4 3D printers. 2 ROBO3D, One Cube Pro, and now I own one Ultimaker 2 after reading so many good comments on this machine.

I did purchase this machine in December. From the very first day I got my Ultimaker I was having underextrusion problem. from every 10 prints maybe 2 prints okay and the rest starts underextruding in the first layer or so, sometime not even the first layer, not even extruding.

I want to let you know that I do always clean the nozzle with Atomic method, so I know for fact that the nozzle is 100% clean, so nothing is blocking the nozzle, and the feeder indicator is at top (  you don't really have so much option with the feeder anyway ! ) because even when indicator is on top , the spring load is already pretty heavy !

So from all you guys that own this printer, can you help us ?

For the past months we had nothing but disappointment. We have do everything that we could but still this problem exists. We want a machine that works consistently , but this machine has failed doing so. Sometimes after atomic clearnring , I get a 1 good print and the 2nd print messes up ( underextruding ), this is just so annoying , we have even tried several different filaments ( different brands). I also know that I use 2.85 mm rather than 3 mm. all of a sudden it looks like the feeder dosnt have a power to push the material in and I hear the tick sound and then its all over, it tries to push but all it does grind in the same spot and therefore eats the material.

I just don't get the fact why 1 time I get a good print and 10 times I don't , what is it really happening is a mistry for us and we really need to solve this.

Do you all guys have this problem ? If you don't how much pressure do you put on the spring in the feeder ? the feeder design by the way sucks !!!

Please help

Edited February 6, 2016 by Guest

[Labern 772]

What temps, layer height and speeds are you trying to print at.

You may need to check you bowden tube and PTFE. even though its new i had one that was no good on one of my new machines.