FIELD: optical instruments. SUBSTANCE: device provides high-quality tracing control by using commands for master shaft speed regulation, taking into account tracing errors instead of standard master shaft speed regulation commands, which do not take into account information about tracing error. Goal of invention is achieved by method, which involves a step for reading value of tracing control signal due to given regulation of amplification gain of tracing error signal, a step for generation of commands of master shaft speed regulation, taking into account value of tracing control signal, a step for detection of master shaft speed error value by means of comparison of master shaft speed command to real master shaft motor rotation, so that tracing error is taken into account by means of given regulation of speed error signal amplification. EFFECT: increased speed of control, improved tracing compatibility, facilitated control of coefficients, simplified design. 16 cl, 9 dwg
