Diagonal lines on my print

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Hi! I getting weird diagonal lines on my print and can't figure it out where they come from! I have try changing the slicer cura, simplify3d, slic3r. I have change the z lead screw for new one, i have rebuild the all machine and put together with more care, i have tighten the belts, i have tune the coencentric nots on all axis, i have try tune pots of steppers drive on mother board, i try fix the stl on many sofware and nothing works. if some can help me i appreciated

Does this happen on other simpler models also? On detailed multi-curved models those lines are most likely model errors. Try making sure the model is solid with Meshmixer.
Also try using the "Slicing Tolerance" setting in the Experimental section of Cura 4.6.1. Lately it has been making a difference for me printing gears.