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What Actually Sets a Spot Welder Output: Transformer, Arm and Secondary Loop Two spot welders with the same number on the nameplate can behave like different machines. One welds 1.5 mm galvanised sheet at a comfortable setting; the other needs everything it has and still marks the surface. Buyers ...

Sizing a Laser Weld: Power Density, Spot Size and Travel Speed The first question about a laser welding job is almost always about watts, and watts on their own say very little. A thousand watts focused into a spot a fifth of a millimetre across and the same thousand watts spread over a millimetre ...