Control system for a livestock feed mixer

A control system for mixing materials for livestock feed, comprising:

• a container which receives the materials;
• agitators which mix the materials in the container;
• a driveline which drives the agitators at an output speed with an output torque;
• a power source which provides an input speed with an input torque;
• a continuously variable transmission that connects the driveline and the power source;
• and
• an electronic control unit configured to prevent an external source from being overcome by the output torque required by the agitators and to maintain an increase of the input torque, wherein
• the electronic control unit is configured to
• receive a value of the output torque,
• calculate a value of the input torque,
• compare the value of the input torque to a control input threshold,
• actuate the continuously variable transmission at a first speed ratio which provides a linear relationship between the input torque and the output torque with a slope, when the input torque is below the control input threshold, and
• actuate the continuously variable transmission at a second speed ratio which provides a corrected linear relationship between the input torque and the output torque with a corrected slope smaller than the slope, when the input torque is above the control input threshold.