Abstract: An automatic drilling system includes a top drive comprising a proximity sensor disposed in a housing thereof. A portion of the top drive is coupled to elevators through load transfer springs such that axial loading applied to the elevators results in relative movement between a link load collar and a load ring. A proximity sensor is mounted such that the relative movement results in a change in signal output thereof. A processor is in signal communication with the proximity sensor and is configured to operate a drive shaft motor. The processor is configured to disable rotation of the motor when the relative movement is indicative of axial loading on the elevators.