G75 OD and ID grooving cycle

Haas NGC G-code · Lathe

Pecks in X for OD or ID grooves. With Z and K it steps along Z and grooves again, so it can open up a wide groove. Peck retract comes from Setting 22.

Format

G75 X [U] I [Z] [W] [K] [D] F

Addresses

Address	What it does
`X`	Diameter at the bottom of the groove
`U`	Incremental X to groove depth
`I`	Peck depth in X, radius
`Z`	Z of the furthest groove pass
`W`	Incremental Z to the furthest pass
`K`	Z step between passes
`D`	Tool clearance when returning, rarely used
`F`	Feed rate

How it works

Non-modal, group 00.

Example program

T0404 (.125 WIDE OD GROOVE TOOL)
G97 S800 M03 (FIXED RPM)
G00 G54 X2.1 Z-.5 M08 (START ABOVE GROOVE)
G75 X1.75 Z-.75 I.05 K.1 F.003 (GROOVE TO 1.75 DIA, .375 WIDE)
…

The full 5-line example is in the app. Example is in inch. Check offsets and clearances first.

Watch out for

K must be less than the insert width or you leave ribs.
The tool returns to the start X after each groove, so start just above the stock.
Use a G04 dwell or a finish pass to clean the groove bottom.

Related codes

G74 · G04

G75 on other controls

The same number can mean something different on another control.

Control	Meaning
Fanuc	OD and ID peck grooving cycle
Mazak (EIA)	X axis grooving cycle
Okuma OSP	Automatic chamfering
Mitsubishi M70 M80	Longitudinal cut-off and grooving cycle
Siemens 840D 828D	Fixed point approach
Fagor 8055 8065	Probing move until touch
Centroid CNC12 Acorn	OD or ID groove peck cycle
Hurco WinMax (NC)	Multi quadrant arc mode (BNC)
Fadal	Tapping head cycle
Swiss (Citizen Star)	Grooving cycle in X

Every G-code for Haas NGC in your pocket. The app has the full example programs, search by number or shop word, a line decoder and calculators for tapping, threading and drilling.

Open G75 in the app All Haas NGC G-codes

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