ProtoTrak Stop/start button

ProtoTRAK is a CNC controller used on industrial milling and lathe machines; the stop/start button is part of its safety interface that halts axis motion in all operating modes (program run, GO TO, Power Feed, tool change). Common failures include mechanical wear or broken contacts from frequent use, electrical shorting to the motor drive circuits, or loss of signal due to cable damage. First‑check steps: verify power and ground continuity on the button circuit, inspect for visible contact wear or corrosion, and review any error codes or log entries indicating a stop/start fault in the controller software.[oss-gpt-20b]

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