Drift control system of a work machine and method thereof
AssigneeDeere & Company
InventorsBryon Neumann, Benjamin DiSabatino
Life of this patent
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Abstract
A drift control method for a machine that includes a controller, a cutting tool, a motor having a motor shaft for driving a machine function, a control valve, and an operator control for commanding a machine function. The drift control method includes sensing a neutral position of the operator control, and when in the neutral position, further storing a first position of the motor shaft or cutting tool in the controller, detecting a change in position of the motor shaft or cutting tool with a sensor, determining a direction as a function of the change in position, and hydraulically controlling the motor shaft or cutting tool to the first position.
Claims20
A drift control method for a machine, the machine including a controller, a cutting tool, a motor having a motor shaft for driving a machine function, a control valve, and an operator control for commanding a machine function, the drift control method comprising:
- sensing a neutral position of the operator control;
- storing a drift control function and a look-up table in the controller, the look-up table including electric current values relative to a load pressure on the motor;
- and
- performing the following steps while the operator control is sensed in the neutral position:
- storing a first position of the motor shaft or cutting tool in the controller;
- detecting a change in position of the motor shaft or cutting tool with a sensor;
- determining a direction as a function of the change in position;
- enabling the drift control function using the look-up table to execute the performing step if the operator control is in the neutral position;
- and
- hydraulically controlling the motor shaft or cutting tool to the first position.
A method of controlling motor shaft drift due to fluid leakage of a machine, comprising:
- providing a controller, a control valve having a first solenoid and a second solenoid, a motor having a motor shaft for driving a machine function, a sensor, and an operator control for commanding the machine function;
- storing a look-up table in the controller, the look-up table including electric current values relative to a load pressure on the motor;
- detecting a neutral position of the operator control;
- sensing rotation of the motor shaft in a first rotational direction with the sensor;
- receiving a pressure signal from the sensing step;
- determining an output current from the look-up table based on the pressure signal;
- and
- electrically controlling the control valve based on the determined output current from the look-up table to rotate the motor shaft in a second rotational direction, where the first rotational direction is opposite the second rotational direction.
A method of controlling motor shaft drift due to fluid leakage of a machine, comprising:
- providing a controller, a control valve having a first solenoid and a second solenoid, a motor having a motor shaft for driving a machine function, a sensor, and an operator control for commanding the machine function;
- detecting a neutral position of the operator control;
- sensing rotation of the motor shaft in a first rotational direction with the sensor;
- electrically controlling the control valve to rotate the motor shaft in a second rotational direction, where the first rotational direction is opposite the second rotational direction;
- storing a look-up table in the controller, the look-up table including electric current values relative to a load pressure on the motor and a fluid temperature;
- receiving a pressure signal from the sensing step;
- reading a current fluid temperature over a CAN link;
- determining an output current from the look-up table based on the pressure signal and current fluid temperature;
- and
- communicating the output current to a first solenoid or a second solenoid to execute the electrically controlling step.
A method for controlling drift of a work machine, the work machine including a controller, a control valve having a first solenoid and a second solenoid, a motor having a motor shaft for driving a machine function, a motor shaft sensor, a pressure sensor, and an operator control for commanding the machine function, the method comprising:
- storing a drift control function and a look-up table in the controller, the look-up table including electric current values relative to a load pressure on the motor and a fluid temperature;
- enabling the drift control function if the operator control is in a neutral position;
- receiving a pressure signal from the pressure sensor at a work line on the motor indicative of rotation of the motor shaft in a first direction;
- determining an output current from the look-up table based on the pressure signal and a current fluid temperature;
- communicating the output current to a first solenoid or a second solenoid;
- and
- controlling the control valve to rotate the motor shaft in a second direction, where the first direction is opposite the second direction.
Dependencies are inferred from the claim text.