CNC Cutting System Interface Checklist

A controller replacement or machine build requires the interface requirements of each component to be checked together. Connector appearance alone does not establish that two devices are compatible.

Before work begins, identify the exact model and revision of the CNC controller, torch height controller, plasma power source and lifter. Obtain the applicable installation documents and check:

• Supply voltage, current and power requirements.
• Motor type, motor drive ratings and control signals.
• Connector and terminal assignments for the specific equipment revision.
• Plasma start and arc-transfer signals, including their electrical ratings and signal direction.
• Arc-voltage feedback and divider requirements, where applicable.
• Initial height sensing, limit switches and collision inputs, where provided.
• Grounding, bonding, cable routing and shielding requirements specified for the complete system.

Plasma equipment can contain hazardous voltages and stored energy. Have qualified personnel isolate the equipment, verify that hazardous energy has been made safe, and follow the equipment manufacturers’ instructions and applicable electrical codes. Do not rely on a generic pinout or grounding arrangement when wiring a specific machine.

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