Newbie printing failures

Hello All,




I've recently purchased the CTC dual extractor 3D printer, and had mixed results and now complete failure :-(


I started by running the level build plate, and then ran this calibration from Thingiverse:-


http://www.thingiverse.com/thing:355893


Which I managed to print with a good, consistent quality. So I went on and did various other prints that were all OK.


Until the next time I went to do a check of the quality before printing I got very poor results (see attachment calibration_issues.jpg).
I re-ran the level build plate check on the printer, and very minor adjustments.
Another calibration and whilst I got a slight improvement over the attachment, still far from perfect.
Now admittedly I was printing with PLA at an extruder temp of 230c, which I dropped to:
extruder speed 40
travel speed 100
bed temp 60
extruder 190


Tried again, and see attached the results1 and results2 files.


So, out of ideas as I can't see a consistent issue to attack.


Any ideas everyone?