dylan-taylor

SOLVED OK, here what I did to cure it. I did the cylinder test and failed major miserably at 5mms . I then Started again on stripping down the head and taking our the Teflon tube. I did notice a little browning on this so I shave about .5m with a craft knife. Then checked the flatness of the new face using Electronic calipers. I then heated up the hot end to 230 and used a safety pin straightened out to clean out the nozzle very thoroughly and also the edge that the Teflon tube sits on. it took about half an hour of burned fingers, a little cursing and swearing. I then put it all back together and started again with my new feeder and hey presto back to new. In fact I am now extruding at 200 with PLA and the results are pretty spectacular.(Ignore cooling lift at the bottom, I didn't use any glue!) Layer height 0.25 Shell thickness1.6mm Print Speed 50mm/s I am doing some free work printing the designs created by students at one of our local schools so I think they will be happy with this. Thanks to all who contributed and hopefully this may help someone else out. Conclusion :Change the stock feeder and make sure you clean the nozzle really really really thoroughly. I did use some 0.4mm needles but it was the Pin from the top of the nozzle and the PTFE trimming that did the trick. :-P Dylan

@nicolinux Have just taken a look at the mosaic printing site. Very interesting idea, but no I did it all manually using PLA from The 3D Filament Shop in the UK.

@pm-dude no I paused and swapped part way through. It made the print quite interesting and I was more involved.

HI Didier, thanks for your reply. The left and right sides ( looking from front of printer) are fine its the Front and back that are a poor holy/stringy print. Filament being used is Either "the3d filamentshop" own brand (not chinese made in the uk) - Ultimaker Blue and some sample of Trideus PLA all with same results.Up until now all prints have been excellent. I have left a print running (new feeder for the back) this morning with the flow rate at 120% and the Temp at 213 Degs. All seemed ok when I left it about half an hour ago. I shall do the cylinder test when I get back home. I did do the cylinder test about 3 weeks ago and passed with flying colours. I still have the test so I will post a pic of both ato compare. Thanks again. Dylan Ultimaker 2

HI All, I am new to this forum as a contributor but not as a reader,I have helped incredibly by the already posted stuff on the forum but I am now stuck. I have been doing excellent quality prints on the Ultimaker 2 since I have had it about 8 weeks ago. I did some prints lately of 4-5 hours for a local school and now all seems to have gone wrong. I have done the Cleaning methods mentioned in the forum, Stripped the head down, Checked the Teflon white bit and tubing and all seems ok, Had the feeder in pieces Used a 0.4 needle to clean nozzle etc. But I cannot fathom out what is going wrong. I have noticed that there is a bit of a pattern. The print starts out fine for the first 6-10 layers and then it goes "stringy and rough" I have notice though that 2 sides seem to be ok and 2 not. I have attached some pictures to see if anyone can shed some light on this for me. This is just a theory but is it possible for a gcode to get stuck in the Ultimaker, it doesn't seem to make much difference if I choose a 0.25 layer or a 0.12 layer. Many thanks. Dylan