Mechanism for detecting misalignment in a continuous belted machine

A track roller assembly for a work machine including a track roller frame with drive and idler wheels and an endless track disposed about the wheels, mid-rollers located between the drive and idler wheels, each mid-roller having a shaft mounted on a bogie frame and a pair of mid-roller hubs having roller wheels mounted on the shaft, one mid-roller hub and wheel on either side of the bogie frame, each mid-roller hub having a guide facing guide blocks, an alignment sensing mechanism to detect misalignment of the track, where the alignment sensing mechanism includes at least one sensor paddle mounted on the bogie frame such that a lobe of the sensor paddle resides adjacent the guide blocks such that sideways movement of the endless track belt causes the guide blocks to contact the sensor paddle before contacting the mid-rollers.