Setting the Starting Angle in G70 Bolt Hole Circles – A Practical CNC Example
G70 Bolt Hole Circle G-Code (canned cycle) is very simple to program due to its small number of parameters.
G70 bolt hole circle parameters are very self explanatory, but this cnc programming example emphasis on the Starting Angle parameter (G70 J).
G70 Starting Angle Parameter J – This is the value of starting angle of first hole ( 0 to 360° CCW from horizontal at the 3 o’clock position).
CNC Program Example
G70 Bolt Hole Circle Example
O1009 N10 T15 M06 N20 G90 G54 G00 X2. Y-1.5 N30 S1620 M03 N40 G43 H15 Z1. M08 N50 G81 G99 Z-0.45 R0.1 F8. L0 N60 G70 I1.25 J10. L8 N70 G80 G00 Z1. M09 N80 G53 G49 Z0. M05 N90 M30
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