Worn tool detector

Details Worn tool detector Worn tool detector

G - Physics

05

B

341/1, 340/124,

G05B 19/4065 (2006.01) B23Q 17/09 (2006.01)

Patent

CA 1206228

WORN TOOL DETECTOR ABSTRACT A worn tool detector system for analyzing input signals from a sensor were the signal is in the form of an analog waveform exhibiting periodic impulses exceeding the average amplitude thereof as the tool wears. A micro- processor controlled variable gain amplification network is utilized to normalize the average waveform amplitude to a fixed level. During machine operation, impulses are de- tected by comparing the sensor waveform to a programmable selected ratio of the normalized level. When a given number of successive impulses are received the microprocessor generates a warning signal which may be used to retract the tool. An adaptive mode is disclosed wherein the sensor waveform throughout the course of the machining operation is repetitively normalized to adjust for different sensor waveform amplitudes.

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