ARC WELDING SYSTEM WITH POWER CONVERTER AND CONTROLLER FOR OPERATING THE POWER CONVERTER THROUGH A WAVEFORM CONTROL SIGNAL AND THE MOTION OF THE ELECTRODE/THROUGH A MOTION CONTROL SIGNAL BASED BOTH ON WELDING STATE AND MOTION STATE TABLES AND SENSING DATA

摘要

The arc welding system 10 includes a power supply 12 having a welding torch 26, an electrode 16, and a switching type power converter 22 connected to the torch 26. The parallel state based controller 34 is coupled to the power converter 22 and provides a waveform control signal to it to control its operations. The controller 34 generates a motion control signal 62 for controlling the movement of the electrode 16 and / or the torch 26. The sensor 48 senses the welding voltage or the welding current. The memory 50 stores a weld state table 54 containing sequential control states and a motion control system state table 56 containing additional sequential control states. Welding waveform 24 is defined in the weld state table 54. The controller 34 controls the operations of the power converter 22 via the waveform control signal in accordance with the weld state table 54 and at the same time adjusts the motion control signal 62 in accordance with the motion control system state table 56 . The controller 34 transitions between the control states according to the signal received from the sensor 48.