SARHAN, Hussein. PLC-controlled stepper motor drive for NC positioning system. International Journal of Engineering and Technology, [S. l.], v. 3, n. 3, p. 298–307, 2014. DOI: 10.14419/ijet.v3i3.2796. Disponível em: https://www.sciencepubco.com/index.php/IJET/article/view/2796.. Acesso em: 25 feb. 2026.