Tool detecting apparatus
First Claim
1. A tool detecting apparatus comprising:
- first detecting means including a plurality of arrayed light-receiving elements receiving a beam of light passing around a tool placed in an optical path, and memory means for sequentially storing a group of binary signals corresponding to the outputs of said light-receiving elements scanned at a predetermined time interval thereby updating its previous contents; and
detecting/arithmetic processing means for detecting said tool in response to an output of said first detecting means, said detecting/arithmetic processing means including at least one of second, third and fourth detecting means,said second detecting means including means for detecting displacement of a tool-holding spindle from its original position thereby detecting the current position of said spindle, means for detecting, on the basis of the contents of said memory means, the timing of detection of a predetermined portion of said spindle by said light-receiving elements, and means for calculating, on the basis of the position of said spindle detected at said detection timing, a correction value required for correcting the amount of displacement of said spindle at the time of machining,said third detecting means including means for holding the maximum number of said light-receiving elements covered by the shadow of said tool while said tool makes one revolution, and means for calculating the diameter of said tool on the basis of the held maximum number of said shaded light-receiving elements, andsaid fourth means including means for detecting a most significant and a least significant bit position where a level change occurs in the binary signals sequentially stored in said memory means and calculating the amount of eccentricity of said tool on the basis of the difference between said positions.
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Accused Products
Abstract
A tool detecting apparatus including a first detection part having a plurality of arrayed light-receiving elements receiving a beam of light passing around a tool placed in an optical path and a memory circuit for sequentially storing binary signals corresponding to the outputs of the light-receiving elements scanned at a predetermined time interval thereby updating its previous contents, and at least one of a second detection part, third detection part and a fourth detection part. The second detection part includes a state detection circuit and a timing circuit while the third detection part includes a holding circuit and an arithmetic circuit. The fourth detection part includes another arithmetic circuit.
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Citations
12 Claims
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1. A tool detecting apparatus comprising:
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first detecting means including a plurality of arrayed light-receiving elements receiving a beam of light passing around a tool placed in an optical path, and memory means for sequentially storing a group of binary signals corresponding to the outputs of said light-receiving elements scanned at a predetermined time interval thereby updating its previous contents; and detecting/arithmetic processing means for detecting said tool in response to an output of said first detecting means, said detecting/arithmetic processing means including at least one of second, third and fourth detecting means, said second detecting means including means for detecting displacement of a tool-holding spindle from its original position thereby detecting the current position of said spindle, means for detecting, on the basis of the contents of said memory means, the timing of detection of a predetermined portion of said spindle by said light-receiving elements, and means for calculating, on the basis of the position of said spindle detected at said detection timing, a correction value required for correcting the amount of displacement of said spindle at the time of machining, said third detecting means including means for holding the maximum number of said light-receiving elements covered by the shadow of said tool while said tool makes one revolution, and means for calculating the diameter of said tool on the basis of the held maximum number of said shaded light-receiving elements, and said fourth means including means for detecting a most significant and a least significant bit position where a level change occurs in the binary signals sequentially stored in said memory means and calculating the amount of eccentricity of said tool on the basis of the difference between said positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification