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Operation
Sequence of operation
A set of flowchart images shows the sequence of operation for the plasma cutting system.
High-voltage relay stages in the ohmic circuit
During a wet process – for example, N₂/H₂O – water can be a current path for the ohmic-sense circuit.

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Operation
- CNC controls and display
  A Computer Numerical Control (CNC) controls cutting system operation.
- Wireless device controls
  You can use a wireless device to set up and monitor the plasma cutting system.
- Power-indicator LEDs
  An Light Emitting Diode (LED) illuminates to show the power status on the plasma power supply and on other system components.
- Sequence of operation
  A set of flowchart images shows the sequence of operation for the plasma cutting system.
  - Power-up state (1)
    The Power-up state (1) process starts when the operator sets the remote on-off switch for the plasma cutting system to the ON position and the redundant remote on-switch (if enabled) to the ON position.
  - Initial Checks state (2)
    During the Initial Checks state (2), the system looks for diagnostic codes and gets temperature and inlet pressure measurements.
  - Gas Purge/Pump On state (3)
    During the Gas Purge/Pump On state (3), the system does a specialty purge of gases and coolant and then does a check of the coolant flow.
  - Wait for Start state (5)
    During the Wait for Start state (5), the Computer Numerical Control (CNC) sends the Plasma Start command to the cutting system.
  - Preflow/Charge DC state (7)
    During the Preflow/Charge DC state (7), the system starts some internal components and measures the gas pressure.
  - Ignite state (8)
    During the Ignite state (8), the system does a check for correct gas pressures, Direct Current (DC) bus voltage, and chopper current. The Ignite state (8) must be completed in 500 milliseconds or less.
  - Pilot Arc state (9)
    During the Pilot Arc state (9), the system does a check for correct coolant flow, gas pressures, temperatures, Direct Current (DC) bus voltage, chopper current, and work cable current. The Pilot Arc state (9) must be completed in 500 milliseconds or less.
  - Ramp-up state (11)
    During the Ramp-up state (11), the system increases current and gas flow to the correct setpoints.
  - Steady state (12)
    During the Steady state (12), the system does a check for correct coolant flow rate, gas pressures, temperatures, and chopper currents. It also does a check for the Plasma Start signal to be removed for the selected process.
  - Ramp-down state (13)
    The Ramp-down state (13) starts when the Computer Numerical Control (CNC) removes the Plasma Start command.
  - End of Cycle state (14)
    The End of Cycle state (14) stops the choppers and gas flows. It also starts timers to stop the fans and the coolant pump.
  - High-voltage relay stages in the ohmic circuit
    During a wet process – for example, N₂/H₂O – water can be a current path for the ohmic-sense circuit.
  - Automatic purges
    Plasma cutting system purges are automatic.
- Process selection
  All of the cutting processes have a process ID that is a unique identification number. Each process ID aligns with a set of preprogrammed values in the cut chart database in the plasma power supply control Printed Circuit Board (PCB).
- Cut charts
  A cut chart contains parameters that are necessary to get optimal results for your cutting process with special materials and thicknesses.
- Torch consumables
  The plasma cutting system uses the same consumable parts for perpendicular-position processes (90° angle) and bevel-cutting processes.
- Example configurations for consumables
  Consumables that are worn or have damage can have a bad effect on cut quality.
- Recommendations for maximum consumable life
  Consumables are the parts of the torch that wear as they are used. Consumables that are near end-of-life can have a bad effect on cut quality and performance.
- 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.
Maintenance
Diagnostics and Troubleshooting
Parts List
Wiring Diagrams

High-voltage relay stages in the ohmic circuit

During a wet process – for example, N₂/H₂O – water can be a current path for the ohmic-sense circuit.

To prevent the flow of current to the ohmic Printed Circuit Board (PCB), the cutting system automatically opens the high-voltage relay and disables the ohmic-sense circuit.

Ohmic sensing for the N₂/H₂O process is available in cutting systems with firmware that is version L or later. Stall force is necessary when the N₂/H₂O process is used underwater.

During a dry process, the cutting system closes the high-voltage relay and enables the ohmic-sense circuit (except during high-frequency starts).