Patent ID: 11883827
Assignee: VERMEER MANUFACTURING COMPANY
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 12:
13. A material reduction machine comprising:
a cutting mechanism;
an internal combustion engine coupled with the cutting mechanism to drive the cutting mechanism;
an infeed portion operable to engage a piece of material to be comminuted by the cutting mechanism and to feed the piece of material to the cutting mechanism;
a sensor operable to sense a load on the material reduction machine via detection of droop in the operation speed of at least one of the cutting mechanism and the internal combustion engine; and
a controller coupled to the sensor and configured to receive a signal indicative of the sensed droop in the operation speed, the controller being operatively coupled to the infeed portion to control stopping and starting of each of a plurality of sequential cutting cycles on the piece of material,
wherein the controller is configured to
utilize a stored first operation speed trip point for stopping a first cutting cycle of the plurality of sequential cutting cycles when the sensor signals to the controller that the first operation speed trip point is attained, and to continue monitoring further droop in the operation speed via the sensor signal as machine load increases momentarily after reaching the first operation speed trip point,
determine and adopt a second operation speed trip point, the second operation speed trip point being based on an observation of a minimum operation speed during the continued monitoring following attainment of the first operation speed trip point, and further being based on a stored correction factor, and
utilize the second operation speed trip point for stopping a second cutting cycle of the plurality of sequential cutting cycles following the first cutting cycle when the sensor signals to the controller that the second operation speed trip point is attained.