What does Mazak G-code G272 do?

G272 — Transverse roughing cycle on the MAZATROL SmoothX control (INTEGREX e-670H). This function allows efficient execution in roughing when cast or forged parts are to be cut along the finishing contour.

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G-CODEEIA/ISO · modal · group 09

G272

Transverse roughing cycle

Q: What is the programming format of G272?

G272 Wd R_ G272 A_ P_ Q_ U_ W_ F_ S_ T_ Wd: Depth of cut For the other addresses and remarks see the description given for G271. d B A Tool path Programmed contour U/2 C w TEP136 The contour of machining by G272 may be one of the four combinations below. Machining is basically executed by feed motions along the X-axis. Finishing allowances U and Ww may have different signs. U 0 w 0 (C) (C) w < 0 w < 0 TEP137 - The s

Machine-specific. This G-code reference is specific to the Mazak INTEGREX e-670H / e-670H-S with the MAZATROL SmoothX control (EIA/ISO programming manual H747PB0030E). G-code availability depends on fitted options, and groups and behaviour differ between Mazak models and control generations — verify against the manual for your own machine before programming with any code.

What it does

This function allows efficient execution in roughing when cast or forged parts are to be cut along the finishing contour.

G272 is modal (group 09) — it stays in effect until another code of the same group replaces it.

Programming format

G272 Wd R_
G272 A_ P_ Q_ U_ W_ F_ S_ T_
Wd: Depth of cut
For the other addresses and remarks see the description given for G271.
d
B A
Tool path
Programmed contour
U/2
C
w
TEP136
The contour of machining by G272 may be one of the four combinations below.
Machining is basically executed by feed motions along the X-axis. Finishing allowances U and
Ww may have different signs.
U < 0 (C) (C) U < 0
w > 0 w < 0
X
(B) (A) (A) (B)
(B) (A) (A) (B)
Z
U < 0 U > 0
(C) (C)
w < 0 w < 0 TEP137
- The section from A to B is to be described in the block designated with P.
 See the description under “2. Escape patterns” for more information. […]

Address words

Note 1: In contradistinction to G271, the automatic selection of escape pattern for G272 does
not depend upon whether the first block (designated with P) of the finishing contour
program is of single-axis or two-axis movement.
Note 2: “Convex” section here denotes a prominence in the Z-axis direction, as illustrated
below.
Examples of finishing contour with convex sections
(B) (A) (B) (A) X+
Z+
(C) (C)
(D)
(F) (E) (D)
(G) (H) (E) (F)
(Note) A single block of circular interpolation can
Programmed contour make a convex section, as the segment from

Notes & precautions

Even if F- and S-codes exist in the program section designated by P and Q, they are

Source

Mazak PROGRAMMING MANUAL for EIA/ISO PROGRAM, manual H747PB0030E, section 13-6-2 Transverse roughing cycle: G272, p. 3-11, 13-57, 13-58, 13-59, 13-60, 13-76, 13-77, 13-78, 13-79. Reference and explanation only — not a reproduction of the manual.

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