ELECTRONIC DISCHARGE MACHINE
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United States of America Patent
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Issued Date -
Mar 10, 2016
app pub date -
Sep 8, 2015
filing date -
Sep 8, 2014
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Abstract
An electric discharge machine for changing a specific resistance of a working fluid by flowing the working fluid through a circulation line including an ion-exchange device, the electric discharge machine includes a specific resistance detection unit configured to detect a specific resistance of the working fluid, a flow time measuring unit configured to measure flow time of the working fluid into the ion-exchange device, and a determination unit configured to determine that the ion-exchange device reaches a life end, when change value of the specific resistance of the working fluid is out of the predetermined range.
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