Joy Mm Delaware, Inc.

Joy Global Underground Mining LLC

David Stryffeler

Anthony Reid

Hekkie Van Dyk

Edward L Doheny, Ii

Ben Snyman

Don W McDaniel

Chris McCormick

A mining machine including a chassis, an actuator, a cutter drum supported by the chassis, the cutter drum driven by the actuator, a cutter bit coupled to the cutter drum, and a controller. The controller includes a processor and memory and is configured to measure a characteristic of the actuator, determine the cutter bit is worn based on the measured characteristic of the actuator, and output a signal when the cutter bit is determined to be worn.

System and method of detecting dull and worn cutter bits

Methods, systems, and computer-readable media containing instructions for controlling a miner. One system includes a cutter head, a left tram system, a right tram system, and a cutter head controller. The cutter head includes a plurality of bits and a plurality of sections defining at least one recess. The left and right tram systems are configured to move the miner, and the cutter head controller is configured to vary a current speed of at least one of the left tram system and the right tram system to cause the cutter head to alternate back and forth to bring the plurality of bits into engagement with material accumulating within the least one recess.

Method of controlling a miner to cause wobble in the cutting heads

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Franklin, PA, United States of America

David Stryffeler