![]() ![]() Less noisy plasma cutters use a technology known as “blowback" or "moving" start, where a moveable, spring-loaded electrode and a DC spark start the plasma stream. Proper grounding and an industrial control are needed to avoid erratic behavior of the machine when using a HF plasma cutter. Plasma cutters that rely on a high frequency (HF) AC voltage to start the plasma stream radiate a significant amount of electromagnetic interference (EMI). Unfortunately, not all plasma cutters are suitable for hobbyist CNC tables. Low Frequency Plasma CuttersĪ high voltage, high frequency AC pulse creates a spark between the nozzle and the workpiece to initate the plasma stream.
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