G-CODEEIA/ISO · modal · group 09
G81
Fixed cycle (Spot drilling)
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
The feed rate will remain unchanged if either I or J(B) is omitted. X, Y, P, D, I, and/or J(B) can be omitted. Whether argument J or B is to be used depends on the value that has been set in bit 1 of Parameter F84 bit 1 = 1 : Argument J-command (argument J-command), setting a B-command will cause the table to rotate. Be care- ful in that case to ensure no interference between the workpiece and the tool.
G81 is modal (group 09) — it stays in effect until another code of the same group replaces it.
Programming format
G81 [Xx Yy] Rr Zz
Address words
- t c : Dwell (in time or No. of revolutions) j 0 : Feed override ratio (%)
- d 0 : Distance from R-point to the starting (b 0 )
- point of cutting feed f 0 : Feed rate
- i 0 : Feed override distance f 1 : Feed overridden f 1 = f 0 ×j 0 (b 0 )/100
- Note: For a horizontal machining center, if the value of bit 1 of parameter F84 is 1
Notes & precautions
- For a horizontal machining center, if the value of bit 1 of parameter F84 is 1
Source
Mazak PROGRAMMING MANUAL for EIA/ISO PROGRAM, manual H747PB0030E, section 13-1-12 G81 [Spot drilling], p. 3-11, 13-14, 13-15. Reference and explanation only — not a reproduction of the manual.