Interaction Methods and Devices
Thus, human-machine interaction (in this case, between the welder and the welding unit) is essential for high quality of the overall welding process, e.g. regarding precision, speed and efficiency. Interaction does not only comprise starting and stopping the process but also the configuration of various parameters like current, arc length, or welding gas. The welding process is a highly precise artisanal task that strongly relies on accurate burner control using both hands. The welder’s eye focus has to stay with the arc and even the smallest movement can be the cause for inaccuracy. Thus, a significant functional impairment related to use of the upper extremities can be noted that is similar to the impairments of people with tetraparesis or quadriplegia. Interaction possibilities are currently limited to starting and stopping the process; some welding machines additionally offer restricted current adjustment options. All further parameters have to be configured via an external operating panel that is usually fixed to the welding power source, which, however, requires an interruption of the welding process.