Printed from Kezuriba (kezuriba.net/en/nc/g21/)
G21
Machining center, LatheModal, group 06Metric (mm) input
⌨Format and notes
G21
- This is normally used in Japanese shops. As with G20, command it once at the start
≠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.
| Source | Machine | Item | Detail |
|---|---|---|---|
| Siemens (ISO dialect) | Machining center | code | G71 (Siemens native mode)In Siemens native mode, G71 is metric. Unrelated to the lathe G71 (rough turning cycle) |
📚Sources
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 Milling, 04.2007 Edition (6FC5398-7BP10-0BA0) cache.industry.siemens.com
- 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. — Mill Operator's Manual – 17 Mill G-Codes (online version) haascnc.com
- Haas Automation, Inc. — Lathe Operator's Manual – 16 Lathe G-Codes (online version) haascnc.com
- National Institute of Standards and Technology (NIST), USA — The NIST RS274NGC Interpreter – Version 3 (NISTIR 6556, 2000) nvlpubs.nist.gov