| 摘要 |
PROBLEM TO BE SOLVED: To solve such the problem that it is impossible to stop the movement of a table by interrupting a high frequency spindle, or outputting an abnormality signal to a table servo control device in a conventional NC router. SOLUTION: An abnormal current detection device is configured of: a base stand 1; a strut 2; a horizontal support member 3; a main spindle head moving member 4; a main spindle head 5; a tool 6; a table 7; and a board 8 to be worked. An inverter high frequency power source device 11 is connected through a transformer 10 to a three-phase input power source 9, and a main spindle load current detection device 12 is connected to the primary side of the transformer 10, and the output of the main spindle load current detection device 12 is connected to a main control device 13, and the output of the inverter high frequency power source 11 is connected to the spindle 5a of the main spindle head 5, and the output of the main control device 13 is connected to a main spindle head servo control device 14 and a table servo control device 15. COPYRIGHT: (C)2010,JPO&INPIT
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