Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
L-DED CNC machine kinematic and geometric evaluation
Submission Author:
Milton Pereira , SC
Co-Authors:
Tiago Colvara Faria, Arthur Lopes Dal Mago, Frederico Narciso, Manoel Kolling Dutra, Cassiano Bonin, Milton Pereira
Presenter: Frederico Narciso
doi://10.26678/ABCM.COBEM2023.COB2023-1665
Abstract
Computer Numerical Control (CNC) machines have become increasingly popular in modern manufacturing, offering precision and efficiency in the production of complex components. In laser applications, such as laser-directed energy deposition (L-DED), the speed and accuracy in each of its axes play a big role in the results and quality of the work produced in the desired part. To ensure the precision and consistency of the CNC motion system’s movements, it is useful to develop a simple methodology to evaluate the accuracy, speed, and acceleration in each axis. This helps to monitor machine performance and maintain the desired level of quality in the manufacturing process. This paper presents a methodology for evaluating a CNC machine's kinematics for laser-directed energy deposition applications. For this purpose, speed and acceleration data acquired from the servo motor encoders during CNC-commanded movement was used to identify input delays and irregularities in the motion system’s kinematics. Furthermore, a simple combination of measurements using a dial gauge was conducted to analyze the alignment of the rotary axis, and an angle correction method was proposed and tested. This data can be used to understand the limitations of the motion system for its applications and may also provide insights for the adjustments of other machine parameters to achieve the desired precision. Primary results revealed that the machine’s speeds were consistent, but some of its axes were not sufficiently perpendicular to each other, indicating that this data can also be used to determine when maintenance or recalibration may be necessary.
Keywords
Machine kinematics, machine accuracy, CNC
