Method and device for identifying a spark-erosion wire on a coil, and application to machining by a wire spark-erosion machine

A device for identifying a spark-erosion wire packaged on a spool, comprising:

• an RFID tag, fastened to the spool and accessible for reading identification data that the RFID tag carries,
• identification data of said wire, carried by the RFID tag, and including a number of turns of wire initially present on the spool,
• an onboard accelerometer on the RFID tag or on the spool,
• wherein:
• the RFID tag is configured to communicate with a data reader device associated with a wire spark-erosion machine for reading and writing the identification data carried by the RFID tag of the spool,
• the RFID tag is of an active or semi-active type, provided with an onboard electrical power supply and an onboard storage circuit to receive and to store said identification data,
• the RFID tag comprises a processor electronic circuit controlled by a program,
• said program includes a storage sequence for scrutinizing and storing, in the storage circuit, signals produced by the onboard accelerometer on the RFID tag or on the spool,
• said program includes a number of revolutions computation sequence, for computing a number of turns effected by the spool about its axis as a function of acceleration signals received from the onboard accelerometer, and for computing a quantity of wire remaining on the spool as a function of said computed number of turns.