| 摘要 |
A control scheme is provided for a power tool having a rotary shaft. The control scheme includes: monitoring parameters of a power tool during operation of the tool; evaluating a rotational condition of the tool about a longitudinal axis of the rotary shaft using a function defined as a linear combination of the monitored parameters; and initiating a protective operation to address the rotational condition of the tool based on an output of the function. In a simple form, the function is expressed in the form c<SUB>0</SUB>+c<SUB>1</SUB>*m<SUB>1</SUB>+c<SUB>2</SUB>*m<SUB>2</SUB>+ . . . +c<SUB>n</SUB>*m<SUB>n</SUB>, where (c<SUB>0</SUB>, c<SUB>1</SUB>, c<SUB>2 </SUB>. . . c<SUB>n</SUB>) are constants and (m<SUB>1</SUB>, m<SUB>2 </SUB>. . . m<SUB>n</SUB>) are the monitored parameters.
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