X-axis belt slipping (at motor)

So while using the xcarve this morning (haven’t had an issue for several months) the belt that drives the X-axis slips at the motor (where the motor revolves to drive either left or right). Has anyone had this issue. It was pretty discouraging as I was using the machine all morning with no issue and suddenly hit this road block. Any help would be appreciated.

Thanks for the advice. I’ll start troubleshooting

Thanks for the help guys, I believe the problem was the pulley slipping. I was able to get everything working again.