Code M01-1027: Thread recutting impossible
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical Thread recutting impossible 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 The lead axis for thread recutting is not pr esent in a thread recut enabled part system. A variable lead thread cut command has been given in the first thread cut block of thread recutting. Remedy Thread recutting is not supported. Disable thread recu tting or press RESET to cancel the alarm, and cor- rect the program.
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 M01-1027 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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