Extruding Incorrectly

Hi

I havean ultimaker printer and I have had quite a lot of problems with it. The firstlayer is not being printed out properly and is causing errors in the rest of mydesign to be printed.

Itseems to be that one way it will print each line completely next to each other,in the other direction it does not seem to print properly. I will includepictures later on. It seems to me that it may have something to do with thecode, but the other day it printed perfectly and now it is not printing thesame way and I have not adjusted the code.

I havetried levelling the bed over 10 times, I have tried with different distancesaway from the nozzle, I have used a spirit level to make sure the bed is level,I have wiped down the base with nail vanish removed to adjust the sticking, Ihave wiped down the nozzle and have checked everything. I have even adjustedthe temperature and the speed at which my object is being printed, but it isstill effecting the overall object.

I donot think that the nozle is releasing any filament on the back stroke in onedirection, does anyone have any ideas as to why this could be?

Thanks!
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