JeffJordan wrote: ↑Wed Sep 13, 2017 12:52 pmcheck the airflow of your print fan. seems as if one side is (internally ?) blocked.
if not: might your printer be located at a position where you get a continous draught ?
maybe near an air condition ?
another cause could be a slightly deformed nozzle tip (oval instead of round).
don't you print the benchy in the direction that it's nose looks towards the LCD module ?
I have checked all of these.about the "roughness" of the back: yes, looks as if the flow is a little bit irregular in x-direction.
check the tension of the x-axis belt, the x-stepper pulley, the extruder pulley and the tension of the two extruder springs.
also make sure that the whole x-axis length is adjusted correctly: if you move the extruder up the z-axis, there should be no force in x-direction transmitted to the trapezoid spindles of the z-axis. make sure they didn't bend and that they turn easily from bottom til top.
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