The monograph outlines the basics of the theory of working processes of roll-packing machines. The main attention is paid to the methods of determining the vibro-gravity of operators of designed roller-packaging machines in the analysis of forest debris after windfalls at the stage of development of design working documentation. Studies of the main technological processes in logging are carried out on mathematical models of dynamic systems "Operator - rolling-packing machine - object of labor - tree" . Based on the results of the research, recommendations were developed for manufacturers to ensure the reduction of vibration effects on operators of roll-packing machines to sanitary norms. The monograph is intended for engineering and technical workers involved in the design of logging machines. It can be useful for researchers, graduate students and students of forestry universities. Bibliographic . 43 . IL. 50 . Table. 21 . Recommended for publication by the Methodological Commission of the Forestry Faculty of St. Petersburg State Forestry University . C. M. Kirova