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Pros/Cons of using high frequency plasma cutter

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Old Jun 12, 2010 | 09:37 PM
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Default Pros/Cons of using high frequency plasma cutter

just trying to find info. will be using it mostly on autos and as a hobby at home.a little cheaper than your popular namebrand out there.Ill take my chances.any info. would be appreciated.thanks.
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Old Jun 12, 2010 | 10:33 PM
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Cons? What are you worried about?
I personally have a Miller 375. Love it!
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Old Jun 13, 2010 | 02:10 AM
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those two words high frequency.maybe its all in my head.Ive looked at Miller and theyre up there in price.like said Ill take my chances on a little cheaper one.thanks.
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Old Jun 15, 2010 | 03:56 PM
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Don't they all use HF?

Ryph
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Old Jun 15, 2010 | 09:52 PM
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apparently not from my searching on the enternet.this brand that I looked up clearly says high frequency on the description.the others doesnt say that.just wondering why.
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Old Jun 16, 2010 | 09:55 AM
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Plasma cutters use a number of methods to start the arc. In some units, the arc is created by putting the torch in contact with the work piece. Some cutters use a high voltage, high frequency circuit to start the arc. This method has a number of disadvantages, including risk of electrocution, difficulty of repair, spark gap maintenance, and the large amount of radio frequency emissions. Plasma cutters working near sensitive electronics, such as CNC hardware or computers, start the pilot arc by other means. The nozzle and electrode are in contact. the nozzle is the cathode, and the electrode is the anode. When the plasma gas begins to flow, the nozzle is blown forwad.

yeah high freq+ expensive cnc electronics= FAIL
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Old Jun 16, 2010 | 01:42 PM
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Got it.

Looking at the specs, the 375 does not use HF start.

Ryph
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Old Jun 16, 2010 | 07:10 PM
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Originally Posted by daryn c
Plasma cutters use a number of methods to start the arc. In some units, the arc is created by putting the torch in contact with the work piece. Some cutters use a high voltage, high frequency circuit to start the arc. This method has a number of disadvantages, including risk of electrocution, difficulty of repair, spark gap maintenance, and the large amount of radio frequency emissions. Plasma cutters working near sensitive electronics, such as CNC hardware or computers, start the pilot arc by other means. The nozzle and electrode are in contact. the nozzle is the cathode, and the electrode is the anode. When the plasma gas begins to flow, the nozzle is blown forwad.

yeah high freq+ expensive cnc electronics= FAIL

thanks for shedding some light on this Daryn C. good info.Id rather be safe than sorry.
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