Around 0605 #3 hoist kicked out at 200' from the collar. Reset hoist brought crew to surface. MSHA Notified 0614, began evac out #1 hoist. All crews out by 0730. The set screw of the encoder on the hoist drum shaft had become loose. Set screw was tightened, the system reset, and test trips ran. All personnel allowed to return to the mine and MSHA notified at 0800.