Nozzle hitting print when moving

[stevetriple]

Hi everyone I have this problem: I'm trying to speed up the print with a movement speed above 100mm/s. When the machine end a layer and start another the nozzle hit the print, so the machine lose the xy coordinates and start printing in a wrong position... even if I check the z-hop on retraction. It seems that the Z movement is not so fast to prevent this