| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric discharge machine controlling fine powder concentration to optimum concentration. SOLUTION: A switching process of a first/second machining fluid is counted by a counter N, in the case of a count number less than n times, in a control device C, a switching process of the machining fluid is further performed. In the case of providing n times or more, by a fine powder addition device 102, fine powder 515 is additionally mixed in the second machining fluid in a tank 514. For instance, in one time switching process of the machining fluid, in the case of fine powder of m(9) flowing out, fine powder of m×n (g) is additionally mixed.
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