US 9,809,949 B2
Controlling crowd runaway of an industrial machine
Nicholas R. Voelz, West Allis, WI (US); and Michael Linstroth, Port Washington, WI (US)
Assigned to Harnischfeger Technologies, Inc., Wilmington, DE (US)
Filed by Harnischfeger Technologies, Inc., Wilmington, DE (US)
Filed on Apr. 24, 2015, as Appl. No. 14/695,268.
Claims priority of provisional application 61/984,322, filed on Apr. 25, 2015.
Prior Publication US 2015/0308073 A1, Oct. 29, 2015
Int. Cl. E02F 3/43 (2006.01); E02F 9/26 (2006.01); E02F 9/20 (2006.01); E02F 3/30 (2006.01); E02F 3/46 (2006.01)
CPC E02F 3/435 (2013.01) [E02F 9/2033 (2013.01); E02F 9/265 (2013.01); E02F 3/304 (2013.01); E02F 3/308 (2013.01); E02F 3/46 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An industrial machine comprising:
a dipper;
a sensor operable to generate a first signal related to an actual crowd system state;
a user interface operable to generate a second signal related to a requested crowd system state based on an operator input;
a crowd motor having at least one operating parameter; and
a controller configured to
receive the first signal related to the actual crowd system state,
receive the second signal related to the requested crowd system state,
determine a requested dipper movement direction based on the second signal,
determine an actual dipper movement direction based on the first signal,
determine whether the requested dipper movement direction and the actual dipper movement direction are the same, and
set the at least one operating parameter of the crowd motor to a value when the requested dipper movement direction is not the same as the actual dipper movement direction, the value being greater than a normal operating value for the operating parameter.