A power tool movement monitor system including a first accelerometer
operatively configured to sense movement along a first axis of a power
tool and a first high pass filter operatively connected to the output of
the first accelerometer. The first high pass filter has an output and a
cutoff frequency corresponding to a predetermined acceleration limit
capable of being output by the first accelerometer. The power tool
movement system further includes a logic circuit operatively configured
to generate a warning signal when the first high pass filter outputs a
signal having a frequency equaling or exceeding the cutoff frequency of
the first high pass filter.