| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power tool that is capable of detecting operation condition, regardless of variations of rotating condition of a motor. <P>SOLUTION: The power tool has a motor 21, a housing integrating the motor 21, a mounting section driven by the motor 21 and capable of mounting a boring bit 2 machining a member to be machined, and a controller for controlling the rotation of the motor 21, and further has an operating condition detecting means for detecting the rotational frequency of the motor 21, a reference value deriving means for deriving first to fourth reference values based on the detected rotational frequency, and an operation start detecting means for detecting the start of the operation of the boring bit 2 to the member to be machined based on the operation condition to the first to fourth reference values in the controller. <P>COPYRIGHT: (C)2012,JPO&INPIT |
