23-01-2020 дата публикации
Номер: US20200023483A1
Принадлежит:
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. 1. A method for controlling a rotational velocity of a cutting device , comprising:determining a present diameter of a cutting wheel of the cutting device; andadjusting 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.2. The method of claim 1 , wherein the present diameter is determined upon demand by a user of the cutting device or periodically without user input.3. The method of claim 1 , wherein determining the present diameter comprises detecting one or both of:light or sound reflected from at least one reflector of the cutting wheel, andlight or sound reflected from the cutting wheel.4. The method of claim 3 , comprising:transmitting, by a source on a first side of the cutting wheel, light or sound toward the cutting wheel; andreceiving, by a sensor on a second side of the cutting wheel, the transmitted light or sound.5. The method of claim 1 , wherein determining the present diameter comprises determining an amount of power used to maintain a present rotational velocity.6. The method of claim 5 , wherein the power is electric power.7. The method of claim 5 , 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 claim 5 , and the distance is used to determine the present diameter of the cutting wheel.8. The method of claim 1 , wherein determining the present diameter is based on one or both of:an amount of time the cutting device is in operation, oran amount of time the cutting wheel is in contact with an item being cut.9. The method of claim 8 , wherein:when the amount of time the cutting device is in operation is used, an initial diameter of the cutting ...
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