When I print some objects, the Y axis his offsetting every layers so I'm not able to print straight. Other parts are perfect and I can't find the link in the part geometry that is the cause.
I print at medium with simplify and with std settings.
It tried to slower the print but no effect.
This may be due to a known bug in Simplify 3D. Try this:
In the Simplify 3D process, on the gcode tab, turn off "allow zeroing of extrusion distances (i.e. G92 E0).