Patent ID: 6941187

Claim:
A multiple discharge-servo curve control method for an electrical discharge machine, which comprises the steps of: (1) constructing discharge-servo curves inputting gap-voltage deviation and cutting speed records obtained under different cutting conditions, and pre-storing the discharge-servo curves in a discharge-servo curve database; (2) retrieving an initial one of said discharge-servo curves and performing a cutting procedure under control of a processing control program by referring to said initial one of said discharge-servo curves; (3) adding a discharge-servo curve instruction to said processing control program, said discharge-servo control instruction specifying an nth discharge-servo curve; (4) when the processing control program detects said discharge-servo curve instruction, retrieving said nth discharge-servo curve from said database; (5) swapping said nth discharge-servo curve for said initial one of said discharge-servo curves and continuing said cutting procedure under control of the processing control program by referring to said nth discharge-servo curve.