Code SP0036: Error counter overflow
Issue Description & Safety Warning
The Fanuc Alpha-i Servo Spindle Amplifier has triggered a critical Error counter overflow 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
Amplifier LED display: 36 Also shown as: SP0036 (15i), SP9036 (30i/31i/32i), SP9036 (0i-D) Action: FS15i FS16i FS0i-B/C FS30i FS0i-D Description 3056 to 3059 4056 to4059 4056 to4059 Gear ratio between the spindle and motor 3060 to3063 4060 to4063 4060 to4063 Position gain at orientation 3065 to3068 4065 to4068 4065 to4068 Position gain in the servo mode/spindle synchronization 3069 to3072 4069 to4072 4069 to4072 Position gain in Cs contour control (2) Sequence error (a) Check if the motor is deactivated (by turning off SFR/SRV) in a position control mode (rigid tapping, Cs contour control, or spindle synchronization).
Source: Fanuc αi Servo/Spindle Amplifier Maintenance Manual (B-65285EN/04) — Part II Troubleshooting
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Fanuc Alpha-i Servo Spindle Amplifier Alarms
Fanuc controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code SP0036 on the Alpha-i Servo Spindle Amplifier 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: 135 Fanuc Alpha-i Servo Spindle Amplifier codes.
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