FIELD: diamond drilling. SUBSTANCE: system for control of diamond drilling practices has feed hydraulic cylinders with regulated feedback throttle valve installed in hydraulic cylinder return line, transducer of power consumed, null-amplifier, setter of comparison level with signal of power transmitter, control unit and servo motor. Signal of power change arrives at input of null-amplifier and applied to its other input is signal from power setter. Appeared at the output of null-amplifier is signal of positive or negative polarity which is fed to input of control unit. The latter includes servo motor which reduces or increases the flow area of throttle valve until signal at null-amplifier output equals zero. EFFECT: higher efficiency. 1 dwg
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