Modal states
Finds motion before G90/G91, mixed G20/G21 and G41/G42 left active.
← NCTune CNC Toolbox
Free CNC tool
NC Code Checker
Find basic structural issues before simulation and machine prove-out, without uploading production code.
Structure checksAxis and tool stats100% localLocal calculations
NCTune CNC Toolbox
A fast check before proper verification
The checker reports line numbers, severity and a concise description for common ISO-code oversights.
Cycles and end block
Warns about G81–G89 without G80 and programs without M2/M30.
Code stays local
The program is analyzed by JavaScript on your device and is not sent to NCTune.
FAQ
Frequently asked questions
Does the checker replace CNC simulation?
No. It does not calculate trajectories, collisions, travel limits or control-specific cycle behavior.
Is my program uploaded?
No. Analysis runs locally in the browser.
NCTune
Need a custom calculator, generator or postprocessor?
NCTune develops automation and tools for Siemens NX CAM, CNC and production environments.