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Hello Colleagues, today we bring a crucial explanation that is necessary for all of us welders: VOLTAGE AND AMPERAGE as well as their differences. We explain it to you:
Voltage refers to the difference in electrical potential between the electrode and the workpiece. Higher voltage generally results in greater penetration, but may affect arc stability.
On the other hand, amperage refers to the amount of current that flows through the circuit. Higher amperage means more heat and therefore greater melting capacity of the metal. Properly controlling the amperage is essential to achieve a quality weld and avoid problems such as porosity.
Both factors, voltage and amperage, are interrelated and must be adjusted depending on the type of metal, thickness, and type of welding you are doing.
Measuring voltage and amperage during welding is crucial to ensuring a controlled process and quality results. Here are some common ways to measure these parameters:
Multimeter:
Voltage: You can measure the voltage by connecting the multimeter in parallel to the welding circuit between the electrode and the workpiece.
Amperage: To measure amperage, the multimeter must be placed in series with the welding circuit, usually in the power cable.
Specific Ammeter and Voltmeter for Welding:
There are instruments specifically designed to measure voltage and amperage on welding equipment. These devices are configured to handle the high currents and voltages associated with welding.
Many welding machines have digital or analog displays that show voltage and amperage in real time. Adjusting these values on the machine will control the output during welding.
The appearance and sound of the arc can provide indications of the voltage and amperage settings. An unstable or overly aggressive arch may suggest adjustments are needed.
It is essential to follow the manufacturer's recommendations and perform tests on scrap materials before beginning major projects. Knowledge and practice in voltage and amperage settings are key skills for any welder.
If you want to explore more about the equipment used in this video, remember that we have a video dedicated to each one:
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