Code 722: LLEGAL CORNER DEFINITION
Issue Description & Safety Warning
The Mazak Mazatrol Matrix CNC has triggered a critical LLEGAL CORNER DEFINITION 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
Type of error: B — Registered data (the program or tool data includes an error) Stopped status: I — Reset stop Clearing procedure: O — Eliminate cause -> press reset key Display colour: Red On-screen parameters (shown in parentheses): WNo., UNo., SNo. Cause: There are the following errors related to the designated corner C data: <BAR, CPY, CORNER> The arc length of the block present before or after corner C is smaller than that of corner C. <T. GROOV> Added corner C is outside the workpiece profile. Action: Correct either the length of corner C or the sequence data set before or after corner C.
Source: Mazak Mazatrol Matrix — Parameter List, M-Codes, Alarm Manual (Section 3 Alarm)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Mazak Mazatrol Matrix CNC Alarms
Mazak controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 722 on the Mazatrol Matrix CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Mazak's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 714 Mazak Mazatrol Matrix CNC codes.
Have a better solution?
Help the industrial community by sharing your repair experience for code 722.
Need a searchable reference for more Mazak Mazatrol Matrix CNC manuals?
We structure equipment manuals into searchable code, title, cause, solution, safety note, and source-reference data. Send a PDF and example searched codes when you need public pages, private search, or structured exports.
Space reserved for Google AdSense / Industrial Affiliate Links
Monetization target for 2026