Hypertherm XPR460 - Arc Response Technology; Automatic Torch Protection

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To get the full benefits of the Hypertherm LongLife and Arc Response Technology
™
, do not fire the
torch into the air.
It is permitted to start a cut at the edge of the workpiece. However,
when possible, start and stop cuts on the surface of the workpiece.
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Use the pierce settings in the cut chart database.
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When possible, do not cut metal that is magnetic or that can easily become magnetic. For example, do
not cut armor plate that has a high nickel content.
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To get the full benefits of the Hypertherm automatic ramp-down error protection, select processes
that have cut speeds of 3,560 mm/min (140 in/min) or less. Refer to Automatic ramp-down error
protection on page 245.
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To keep the risk of catastrophic failure of a consumable part to a minimum when cut speeds are more
than 3,560 mm/min (140 in/min), always do these steps when cutting:
□
Decrease the cut speed when the end of the cut is near.
□
Program torch movement into the scrap area of the workpiece.
When possible, use a chain cut so that the path of torch movement
goes directly from one cut part to the next. This type of cut decreases
the quantity of plasma arc starts and stops for multipart cutting,
which can cause damage to electrodes.
Arc Response Technology
Arc Response Technology lets the plasma cutting system adapt to problems at the torch that can cause
decreased consumable life or possible torch damage.
One or more choppers in the plasma power supply monitor the current and arc voltage load in intervals of
33 microseconds (30 kHz). This scan helps the system to almost immediately find and adapt to possible
problems at the torch during cutting.
Automatic torch protection
When consumables have a catastrophic failure (or blow out) at high current settings, torch damage can
occur. This torch damage can occur from the plasma arc or from molten copper or brass that gets into the
coolant paths of the torch.
If catastrophic consumable failure occurs, the chopper or choppers in the plasma power supply can
find the problem at its start through the EMI or noise signature of the current that is being supplied to
the torch. The chopper adapts quickly to stop the cutting system and to prevent damage to the torch.
Operation
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811530 Instruction Manual XPR460