Arquitectura de control electrónico en cuadros de maniobra de máquinas de control numérico para corte por plasma y oxigás

Abstract

Nowadays cutting machines usually used in

industry are controlled by a Computer Numeric

Control (CNC) system working with a lot of

signals which communicates with sensors and

actuators in the machine through a control

cabinet. In many cases this unit is designed

by the cutting machine manufacturer (who is

usually different from that of the CNC) and, as he

is not a specialist in electronic design, the control

cabinet is electrically implemented with the logic

functions carried out in a discrete way by means

of relays. This solution generates a hard wiring

work when mounting onto the machine and

makes it very difficult to repair when a failure is

detected.

This work presents a new electronic control

system which replaces the old electrical one,

with all its relays, usually used in this sort of

machines. This new system has been tested in

a plasma and oxifuel cutting machine. It has

provided a noticeable reduction in the machine

wiring and a simplification of the control cabinet

design. These facts mean that the machine is now

easier to assembly with an important reduction in

purchasing and maintenance costs.