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A method and apparatus for plasma cutting includes a cutting power supply, preferably a buck converter, and a compressor. The cutting power supply provides power to a plasma torch, and the compressor provides air to the torch. The air compressor is integrated into the plasma cutter, and includes a c

A method and apparatus for plasma cutting includes a cutting power supply, preferably a buck converter, and a compressor. The cutting power supply provides power to a plasma torch, and the compressor provides air to the torch. The air compressor is integrated into the plasma cutter, and includes a compressor motor, preferably with a buck convertor power supply, or having the motor windings are part of the buck converter that is the cutting power supply. The motor is regulated regulator to a fixed setpoint or a user setpoint by a compressor regulator in response to a feedback signal, preferably a compressor motor voltage feedback signal. The compressor also turns the compressor on and/off in response to a trigger and/or cutting current feedback signal and has an on/off circuit responsive thereto in various alternatives. The cutting power controller and the compressor regulator are part of an integrated controller, and/or the cutting power supply and the air compressor are in a common housing, and/or the cutting power supply and the air compressor have an integrated power supply.

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1. A plasma cutter comprising:a cutting power supply disposed to provide power to a plasma torch; an air supply, disposed to provide air to the plasma torch, wherein the air supply is integrated into the plasma cutter; and an air supply regulator disposed to receive a feedback signal, and further di

1. A plasma cutter comprising:a cutting power supply disposed to provide power to a plasma torch; an air supply, disposed to provide air to the plasma torch, wherein the air supply is integrated into the plasma cutter; and an air supply regulator disposed to receive a feedback signal, and further disposed to regulate the air supply in response to the feedback signal; wherein the air supply regulator is further disposed to receive a plasma current feedback signal, and includes an on/off circuit responsive to the plasma current feedback signal.