G70 Bolt Hole Circle (Group 00)
I Radius (+CCW / -CW) J Starting angle (0 to 360.0 degrees CCW from horizontal; or 3 o’clock position) L Number of holes evenly spaced around the circle
This non-modal G code must be used with one of the canned cycles G73, G74, G76, G77, or G81-G89. A canned cycle must be active so that at each position, a drill or tap function is performed. See also G-Code Canned Cycles section.
Program Example Description % O01974 (G70 Example) M06 T1 M03 S1500 G54 G00 G90 X0. Y0. G43 H01 Z0.1 G81 G98 Z-1. R0.1 F15. L0 (L0 on G81 line so it does not drill extra hole at start.) (An L value of zero skips first hole in pattern.) G70 I5. J15. L12 (Drills 12 holes on 10” below center starting at 15 degrees.) G80 G00 Z1. M05 M30 %
G70 Bolt Hole Circle