This paper shows a general approach to building of automation systems for production equipment of plasma electric arc spraying, based on algorithmic control of workpiece form elements and, the assignment of motion algorithms for precise mechanisms in multivariable electric drive systems (MEDS) taking into account a variability of forces and moments in MEDS mechanisms. The algorithms of adaptive control implementation and parameters computation for a special class of precise mechanisms in MEDS built on the basis of closed-chain mechanisms for divided motion of processing tools and workpieces in three-dimensional space are proposed. One of speed increase variant by means of auxiliary time reduction of plasma torch mechanisms motion using programmed correction of control signals by acceleration and braking is described. The development of mathematical model of MEDS performing coordinated motion of plasma torch holder mechanisms and workpiece is considered. The technique of MEDS kinematic and dynamic parameters calculation during technology cycles of plasma coating is proposed. The requirements to mathematical modelling tools are considered.