Hello,
I have an Ultimaker 2 which for the past 2 months I cannot get it to print anything from to bottom without a single underextrusion.
First I would like to ask if, after atomic method performed once or twice, is it normal that during changing the filament procedure at the part where the new filament has to be inserted the feeding system to go back and forth once it gets near the tip of the extruder.
Then I start printing and depending on the size of the object the printer underextrudes aprox. once or twice per each layer.
I check the feeder system and it appears to work just fine. Here I have to add that position of the hex screw on top of the feeding system is set to the first indicating line from top to bottom.
Then the bowden tube seems to be OK. Maybe some small particles of dust on the inside but I don't think that this could block the extruder.
Next the extruder on which I performed as I mentioned earlier that I tried to clean several times with the atomic method after which it seemed to be clean.
In the past I used some poor quality filament which was not good at all, but now I'm using Faberdashery of whom I heard only good feedback.
I tried different printing parameters with temperatures from 200 to 235 degrees and speeds around 50mm/s, layers around 0.15mm.
On the same printer a few month ago I was printing pretty well with 80-100mm/s and a temperature of 215 degrees with Innofill filament.
I have the printer for almost a year, but I printed only 180hrs.
Please let me now if anyone has some ideas on this because I'm out of them.