Code M01-1043: No spindle speed clamp
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical No spindle speed clamp 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
Details When the parameter "#1146 Sclamp" has been set to "1", the constant su rface speed command (G96) was issued to the spindle which is not selected for the spindle speed clamp command (G92/G50) under Multiple spindle control II. When the parameter "#1146 Sclamp" has been set to "0", both the G96 (Const ant surface speed control ON) modal and the pindle forward or reverse rotation signal have turned ON for the spindle, on which the speed clamp command is disabled. Remedy Press the reset key and carry out the remedy below. Issue the G92/G50 command to the sp indle that is to be used for the constant surface speed control.
Source: Mitsubishi M800/M80/E80 Series Alarm/Parameter Manual (IB-1501279)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Mitsubishi M800/M80 CNC Alarms
Mitsubishi controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code M01-1043 on the M800/M80 CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Mitsubishi's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 722 Mitsubishi M800/M80 CNC codes.
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