Monitoring method and system for a tool-holding spindle

Details Monitoring method and system for a tool-holding spindle Monitoring method and system for a tool-holding spindle

2008-07-01

2008-07-01

Cadugan, Erica E (Department: 3722)

Tool changing

Process

C483S012000, C409S131000, C409S233000

Reexamination Certificate

active

07393311

ABSTRACT:
A sensor detects an axial position of a rod controlling a tool-gripping collet in a tool-holding spindle whenever a tool is picked during a working session. The current obtained rod position value is compared with previous rod position value, which has been obtained and stored during the previous tool-picking and, if their deviation is larger than a predetermined threshold, the collet closure is notified as defective. The rod position is obtained as an average of a plurality of closely spaced readings, which are taken after a predetermined delay from the collet closure.

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