In the paper there is considered the automation of machines for tribotechnical tests. A method for the automation of testing machines of friction based on the use of DAQ-techniques is offered. A kinematics and a functional scheme of a testing machine of friction are shown. The means for the automation of friction and wear tests at a reciprocal motion including precision sensors are shown. A method for the definition of combined wear in a sample and counter-body is presented. The scheme of the automation of a loading device with automatic additional loading of a sample up to the value specified by an operator is offered. A scheme for an automatic breakdown of tests at system over-heating is shown. The algorithm for the operation of an automated system of investigations at wear tests is developed. The depen-dences are shown on the basis which the system calculates test parameters such as friction force, friction path, wear rate. In the paper there is shown an example of the interface of the program which controls tests and also a method for the calibration of wear sensors is described. A program window is shown in which a value of joint wear in a sample and counter-body is registered.