Printed from Kezuriba (kezuriba.net/en/nc/g70/)

G70

LatheOne-shot, group 00

Finishing cycle (finishes the profile rough-cut with G71–G73)

⌨Format and notes

G70 P_ (first sequence number of the profile) Q_ (last sequence number)

Follows the finishing profile written in the P–Q range exactly
In roughing (G71, etc.), F, S, and T inside P–Q are ignored; in the G70 finishing pass they are active (Siemens ISO T, Haas)
After finishing, returns to the start point at rapid (Haas)

Diagram: How G70 (lathe) cuts

Traces the finish profile written in P–Q once to finish the allowance left by G71–G73. When done, it returns to the start point by rapid.

The same code can be written or assigned differently depending on the CNC control and the machine builder. Always check your machine’s manual.

Source	Machine	Item	Detail
Haas	Machining center	Notes	Subprograms can be included inside P–Q (Haas-specific; explicitly stated as not FANUC-compatible)

The meaning shown agrees in at least two sources (agreement confirmed). Explanations are written in our own words.

Siemens AG — SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D Programming Manual ISO Turning, 04.2007 Edition cache.industry.siemens.com
Haas Automation, Inc. — G-code, M-code, and Setting (per-code explanation pages) haascnc.com
Haas Automation, Inc. — Lathe Operator's Manual – 16 Lathe G-Codes (online version) haascnc.com