Always read and follow the safety precautions and operational instructions in your owner's manual.
- Resistance welding is not recommended for aluminum, copper or copper alloys. Use for steel and stainless steel only.
- For more heat (amperage output), use shorter tongs.
- For units without a heat control, tong length can be used for a control. For instance, for thin metals where you want less heat, longer tongs can be used.
- Keep in mind that longer tongs can bend, and you may lose pressure at the weld.
- For the metals being welded, make sure there is no gap between the pieces — this will weaken the weld.
- Keep the alignment of the tongs straight, so that the tips touch each other exactly. Also, maintain a proper pressure adjustment — not too much or too little pressure.
- When you need one side of the weld to have good appearance, you can flatten (machine) the tip somewhat on that side.
- Clean the tips on a regular basis, or you will lose output (amperage). Dress the tips with a proper tip dresser.