日本語

Printed from Kezuriba (kezuriba.net/en/nc/g41/)

G41

Machining center, LatheModal, group 07

Cutter compensation left (tool is on the left of the direction of travel)

⌨On machining centers

G17 G01 G41 X_ Y_ D_ F_

Diagram: Cutter radius compensation: left (G41) and right (G42) of travel direction

Programmed pathG41 (left)G42 (right)Tool center path (dotted)Facing the traveldirection (arrow):Tool on left → G41Tool on right → G42No compensation → G40With spindle CW (M03):G41 = climb millingG42 = conventional millingOffset amount is thetool radius under the D no.
G41 offsets the tool center to the left of the travel direction by the tool radius from the programmed path (the contour to be finished). With spindle CW this is climb milling.

◎On lathes: Tool nose radius compensation, left

The same number means something different on lathes (FANUC-type G-code system A). Group 07.

Diagram (lathe): tool nose radius compensation, imaginary tip and nose center

ZXG42 nose-center pathImaginary tipWithout compensation, tapers and arcsare left undercut (orange)OD toward Z− (tool on the right) → G42ID toward Z−, face toward X− → G41
The tool tip is rounded (nose radius), so moving the imaginary tip along tapers and arcs leaves stock or overcuts. G41 offsets the nose center to the left of the direction of travel; used for ID cuts toward Z− and facing toward X− (drawn with X+ up).

📚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. National Institute of Standards and Technology (NIST), USA — The NIST RS274NGC Interpreter – Version 3 (NISTIR 6556, 2000) nvlpubs.nist.gov
  4. Siemens AG — SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D Programming Manual ISO Turning, 04.2007 Edition cache.industry.siemens.com
  5. Haas Automation, Inc. — Lathe Operator's Manual – 16 Lathe G-Codes (online version) haascnc.com
  6. Ministry of Health, Labour and Welfare (MHLW), Human Resources Development Bureau, Office of the Councillor for Skills Evaluation — Human resource development manual using the practical exam tasks of the Grade 3 Skilled Worker Test: CNC lathe work (March 2018) waza.mhlw.go.jp