Fault route
CT-312 Plasma Weak Cutting Current Diagnostic
A CT-312 plasma route for weak cutting, poor arc transfer or low cutting current.
Quick Answer
Weak plasma cutting current is not always a board failure. Start with air pressure, torch consumables and work return, then check current command, middle-board output diodes/reactor/shunt and feedback path.
Diagnostic path
Air pressure → torch consumables → work clamp → current setting → middle-board output → shunt/feedback → top-board drive.
Evidence table
Air or consumables wrong: poor cutting despite electronics. Work return poor: weak transfer. Command OK but output weak: middle-board output path. Feedback abnormal: shunt/feedback socket.