Carving moving to the right 1 1/2"

[sunmiztres]

I am having a problem that I can't figure out. I have tried 3 times. When carving it starts out fine but at about 10% through the carving the entire project moves to the right 1 1/2". I have cleaned the machine thoroughly. unplugged everything and blew them out. Cleaned the y motor, z motor. Restarted the project and the same thing happens. I have included a picture. You can see on the UCB where the carving carved into the UCB on the previous carve. Please let me know if you have any ideas what the problem is. The carve moves at the exact same place every time.
Thank you