Help ! z axis problems


I’m trying to print at 0.5 microns but I can’t finish the whole process. Only part was printed, I tried to adjust the z-axis, from -50 to + 50, but I got the same result.

the same object at 1 microns prints good well at -60 (z axis) but at 0.5 microns I can’t print it ( only about 80 layers of 500 )

some help ? thanks !