Method for operating a machine tool, and machine tool operable by the method

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United States of America Patent

PATENT NO 11000971
APP PUB NO 20190077046A1
SERIAL NO

16084748

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Abstract

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A method for operating a machine tool that includes an electric motor for driving a drilling tool and an open- and closed-loop controller for open- and closed loop control of the motor power. The method includes: operating the machine tool in a tapping mode at a first rotational speed value, where the first rotational speed value is lower than a predetermined idling speed value of the electric motor; detecting a predetermined first threshold value for the motor current; reducing the motor current to a predetermined second threshold value when the first threshold value is exceeded; operating the machine tool at a second rotational speed value, where the second rotational speed value is lower than the first rotational speed value; operating the electric motor at a predetermined motor current value; and operating the controller for closed loop control of the motor power via the motor current with an oscillating action.

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Patent Owner(s)

Patent OwnerAddress
HILTI AKTIENGESELLSCHAFT9494 SCHAAN

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Drexl, Tobias Weil, DE 9 22
Sattler, Christian Biessenhofen, DE 19 116

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