| Popis: |
The aim of the authors’ research is to evaluate the results of using a programmable controller to manage the precise feed drive of a metal-cutting machine, and the ultimate aim of the research is to modernize decommissioned equipment and expand its functionality. The task set by the authors in the project implementation for modernizing the thread grinding machine was to assess the positioning accuracy of the working devices of the facilities, with the operational correction of the equipment drive discretization. A stepper motor managed by a logic controller was used as a drive; the same controller processed the data received from the linear displacement sensor. The authors used statistical methods for estimating the positioning error of the operating devices of the facilities, depending on its movement speed. In this case, the minimum and maximum values of the error were discarded according to the Grubbs criterion. In the experiment, the operational processing of the measurement results was used, followed immediately by the discrete correction in the control system. The findings of the study allowed obtaining a new method for discreet correction in the drive control, which made it possible to immediately evaluate the modernization results, without studying the facility transmission mechanisms. Implementing the findings allowed extending the equipment service life in the new capacity. |
