Code SVGN-040: Thk:%s NOT intol(expect:%s).
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Thk:%s NOT intol(expect:%s). alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Cause: The Measured part thickness deviates from the specified value more than the Under or Over thickness limit(mm). The part might be out-of-tolerance. Remedy: Check the master position for the gun axis and make sure the tips touch at the zero position (+/- 0.1mm). Confirm that tip wear and gun sag compensation are enabled and that the compensation values are correct. Check the part or re-enter the part thickness in the pressure schedule. Alternatively, increase the Under and Over thickness limits in the Part Thickness check screen found on the Servo Gun General Setup screen. Resume the program, to retry the measurement. Perform thickness check calibration again, if the problem persists.
Source: FANUC Robot R-30iA Alarm Code List Operator's Manual
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Fanuc R-30i Series Robot Controller Alarms
Fanuc controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code SVGN-040 on the R-30i Series Robot Controller identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Fanuc's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 6553 Fanuc R-30i Series Robot Controller codes.
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