CNC Programming & G-Code/M-Code Reference

Syntax, canned cycles, coordinate systems, tool compensations, and safe programming protocols.

G71 Rough Turning Outer Diameter Stock Removal: Programming, Syntax & Practical Rules

Automated longitudinal turning canned cycle removing roughing stock in parallel Z-passes defined by a profile subroutine (P to Q).

Synchronous spindle rotation and Z-axis feed coordination matching tap thread pitch precisely without floating tap holders.

Tool length offset activation (G43 positive, G44 negative) synchronizing spindle gage lines with cutting tool tip points.

Continuous electronic lead-screw synchronization for custom, variable-lead, and multi-start threads on CNC turning centers.

Euler angle coordinate system transformation for 3+2 positional 5-axis machining on compound angled faces without CAM re-posting.

Automated multi-pass external and internal threading with constant chip load calculation and modified flank infeed angles.

Dynamic 2D cutter diameter compensation (G41 Left, G42 Right) allowing programmers to use nominal part prints regardless of reground tool wear.

Full retract peck drilling (G83) to initial plane for chip evacuation vs partial chip-break retract (G73) for non-stringy materials.

High-speed single-pass finishing cycle executing the exact profile contour defined between P and Q block numbers from G71/G72 cycles.