DEVICE AND METHOD FOR MONITORING AN ARC PROCESS

摘要

The invention relates to a method and a device for monitoring an arc process carried out with a torch (7), particularly a welding process, wherein the torch (7) performs a pendular motion at a pendular frequency (fP), and images (Pi) of the surroundings of the arc (13) are recorded at an image refresh frequency (fB) with the aid of a monitoring system (27) which is connected to the torch (7) and comprises at least one camera (28), and the images (Pi) are presented on a display device (31). By determining the shift (I) of the current image (Pi) from the previous image (Pi-1), shifting the current image (Pi) in the direction of the pendular motion by the component (?d') of the determined shift (I) and displaying the shifted current image (Pi), it is possible to compensate for the movement of the images in accordance with the pendular motion of the torch (7).