Abstract: In the majority of studied options of processing with increase in energy and frequency of impulses the effectiveness ratio decreases that is explained by distinction of dynamics of change of output parameters of process: productivity increases to a lesser extent, than wear of an electrode tool grows. It is found out that the exception makes option for an electrode tool diameter 20 mkm when with increase in frequency of impulses the effectiveness ratio slightly increases by 13.6%. Thus, for small diameters of an electrode tool it is necessary to use higher frequencies of impulses of small energiya.