Dan Jennings says
This is a dedicated steel dent pulling system for bodyshops, designed for controlled heat input on outer panels rather than structural welding. In day-to-day use it sits by the bench or rack, with the earth clamped close to the damage while you work with pull washers, stars, studs or a pulling bar to bring stretched metal back into line.
The key with this type of welder is clean steel and consistent contact. Paint, e-coat and zinc must be removed properly or the unit will either misfire or overheat the contact tip trying to compensate. Correct program choice for panel thickness and tool type matters as well; too much energy and you harden or thin the panel, too little and the washers shear off under load.
A common issue we see is poor earth connection on corroded pinch welds, leading to erratic performance. When it is set up correctly and kept clean, this kind of digital dent repair welder gives reliable, repeatable pulls and helps keep filler use and panel distortion under control.
Dan Jennings, Senior Engineer