Code SPOT-304: Stroke disabled during weld retry %s
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Stroke disabled during weld retry %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 weld retry function is enabled, and $spotconfig.$stroke_enable changed from TRUE to FALSE during the retry process. In this case, a weld was started, but not completed. SPOT-304 is posted to provide an opportunity to complete the weld. Remedy: If you want to complete the weld enable stroke, and press FAULT RESET to continue. If you do not want to complete the weld, press FAULT RESET to continue (stroke enable remains false).
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 SPOT-304 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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