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US 11,833,632 B2Granted
Method and apparatus for maintaining a surface speed of a circular cutting device
AssigneeIllinois Tool Works Inc.
InventorsSarah Marie Beranek, John Edward Bussan, Douglas A. Ceckowski, Christian Chkaiban, Chelsea B. Frid, Jeffrey E. Joray, Michael E. Keeble, Bryan J. Kordus, Michael Shtilman
Life of this patent
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Abstract
Provided is a disclosure for a cutting device configured to control a linear speed of a cutting wheel as the cutting wheel gets smaller with use.
Claims20
A method for controlling a rotational velocity of a cutting device, comprising:
- determining a present diameter of a cutting wheel of the cutting device;
- and
- adjusting a rotational velocity of the cutting wheel based on the present diameter to have a surface speed of the cutting wheel at substantially a pre-determined constant surface speed,
- wherein determining the present diameter comprises determining an amount of power used to maintain a present rotational velocity, and
- wherein the power is electric power and wherein the determining the present diameter comprises determining a distance from a sensor to at least one of a surface of an item being cut by the cutting wheel and a member supporting the item, and the distance is used to determine the present diameter of the cutting wheel.
2 more elements
A method for controlling a rotational velocity of a cutting device, comprising:
- determining a present diameter of a cutting wheel of the cutting device;
- and
- adjusting a rotational velocity of the cutting wheel based on the present diameter to have a surface speed of the cutting wheel at substantially a pre-determined constant surface speed, wherein determining the present diameter is based on one or both of:
- (i) an amount of time the cutting device is in operation and an initial diameter of the cutting wheel when the cutting device starts the operation, and
- (ii) an amount of time the cutting wheel is in contact with an item being cut and an initial diameter of the cutting wheel prior to a first contact with the item being cut.
2 more elements
A method for controlling a rotational velocity of a cutting device, comprising:
- determining a present diameter of a cutting wheel of the cutting device;
- adjusting a rotational velocity of the cutting wheel based on the present diameter to have a surface speed of the cutting wheel at substantially a pre-determined constant surface speed;
- comparing the present diameter with a previous diameter;
- determining a change rate of the present diameter;
- when the change rate is greater than a first threshold, adjusting the rotational velocity of the cutting wheel to zero;
- and
- providing a warning when the change rate is less than or equal to the first threshold and greater than or equal to a second threshold.
4 more elements
Dependencies are inferred from the claim text.