Nozzle Diameter Issues

[DuncFin 0]

Hello,

I have an ultimaker 2+ and am having some issues using the nozzles with a diameter less that 0.6mm. I have used the atomic method to clear the nozzle, but a lot of plastic accumulates around the nozzle head during the print and ends up messing up the print.

Does anybody have any advice on how I can avoid this from happening? As it stands the 0.4 and 0.25 nozzles are pretty much unusable.

Cheers.

[geert_2 560]

I wipe the nozzle's outside with silicon oil and PTFE oil sometimes. In the beginning I had to do this more often, but now I do it occasionally. It reduces accumulation somewhat, but does not totally prevent it.

It also depends on the material you use: PET caused more problems than PLA for me. Also, if you have overextrusion, this happens more, as the excess material accumulates on the nozzle.

Printing cooler and slower also helps a bit for me.

(This is for an UM2 with 0.4mm nozzle.)

[DidierKlein 729]

How is it accumulating? By dragging plastic from the print or is it leaking from the top of the nozzle?