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Straight answers to the questions people ask most when choosing and using a heavy duty diesel engine driven welder.
It combines a diesel engine, a welding generator and usually auxiliary power in one unit. It is used for pipelines, construction, structural steel erection, plant repair, shipyards and remote sites where there is no mains supply.Because it provides high output and can run for long periods, it suits demanding work with large electrodes or wire, and powering tools around the work area.
Consider the biggest electrode or wire size, the processes you will use and how many welders will share the machine, if multiple operators are possible. Then add the auxiliary power you want for grinders, lights and other tools.Check the rated current at the duty cycle you need, and leave some headroom. Under-sizing leads to overheating, while very large machines use more fuel than necessary.
Engine driven welders normally run stick (MMA). Many also provide wire welding with a suitable wire feeder, DC TIG or arc gouging, but this depends entirely on the modes and output of the individual machine.Check the data plate and manual for the processes supported, and whether it has constant current and constant voltage modes. Wire feeders and accessories must be compatible with the machine and suit the work.
Constant current output suits stick and TIG welding, where the current stays steady as arc length changes. Constant voltage output suits MIG and flux-cored wire, where the voltage is set and the wire feed controls current.A multi-process machine has a selector that switches between the modes. Choose the mode for the process you are using.
Yes, most have generator outlets for power tools, lighting and other equipment. Add up the total power of the equipment, including starting surges, and make sure it is within the machine's auxiliary rating, taking into account any welding being done at the same time.Use correctly rated leads and protection devices suitable for site use, and follow the manual for what can run simultaneously with welding.
Check engine oil, coolant and fuel levels, the condition of the air filter, belts, battery and cables, and look for leaks. Make sure the machine is level, the exhaust is clear and nothing blocks the cooling air.Check the welding leads and connections. Follow the daily check list in the manual before every start.