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Printed from Kezuriba (kezuriba.net/en/nc/g69/)

G69

Machining center, LatheModal, group 16

Coordinate rotation cancel

⌨On machining centers

G69

Diagram: Coordinate rotation: center and angle

R (angle)CCW is +Rotation center(X, Y)Shape before rotationShape rotated by G68G69: cancels rotationRotates the coordinatesystem R degrees about (X, Y),so later commandscut in the rotated orientation
G69 returns the coordinate system rotated by G68 to normal. Turn cutter compensation on after the rotation and cancel it before canceling the rotation (Haas example).

◎On lathes: Meaning differs by machine (see G68)

The same number means something different on lathes (FANUC-type G-code system A).

≠Differences between controls and machines

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

SourceMachineItemDetail
Siemens (ISO dialect)LatheMeaningOpposed turret OFF
HaasLatheMeaningCoordinate rotation cancel

📚Sources

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

  1. Siemens AG — SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D Programming Manual ISO Milling, 04.2007 Edition (6FC5398-7BP10-0BA0) cache.industry.siemens.com
  2. Haas Automation, Inc. — Mill Operator's Manual – 17 Mill G-Codes (online version) haascnc.com
  3. Siemens AG — SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D Programming Manual ISO Turning, 04.2007 Edition cache.industry.siemens.com
  4. Haas Automation, Inc. — Lathe Operator's Manual – 16 Lathe G-Codes (online version) haascnc.com