illustrator still having troubles when i trie to print my arts

[fernales]

I have troubles when i try to print gradients on my desings, on my mac display the image looks good but when i print it comes with a lot of liines that hasn't are in the desing

displayed image

printed image

actually I'm using mac os 10.12.13 sierra, illustrator cc 2017, and using a toshiba estudio2550c printer

[jdanek]

What color mode is your file?  What colors are used in your grayscale gradient?  Double check your blending modes and overprint settings ( if any ).