BEWEGUNGS- ODER POSITIONS-STEUERSYSTEM

摘要

An arc welding machine has a bed plate (17) with a sliding worktable (14) driven through a screw (28) by a motor(30). TWo vertical columns (20) support a cross beam (34) which carries the welding head (40). The welding head can move along the cross beam by another lead screw (36) driven by another motor (38). The welding head can pivot about its vertical axis and its angular position is measured by a transducer (43) mounted in the support (42). As the stylus (46) follows the line of the required weld between the workpieces (16), the transducers transmits signals to a circuit which controls the motors and so ensure that the welding electrode follows the correct path.