Thought I needed an on topic post after my OT post
I finished my job drilling 6.75 deep 3/8" holes in 1018 steel Did a rather conservative 1xD peck. My main concern was not breaking the $80 drill, a few extra minutes did not matter much, as most of the time on this job was moving the 250 pound piece around, needed 4 moves to drill the whole part end to end and I had to saw the windows of my machine bigger to let it stick out the sides.
First spot drill then jobber drill to 1.9" deep, then as follows
N1600G0G17G20G40G80G90 N1610(3/8" LONG PARABOLIC FLUTE GUHRING DRILL) N1620G0G91G40G80G28Y0Z0T5M6 N1630G54D35 N1640M01 N1650G90G43Z1.H5M3S713 N1660/M8 N1670G1Z.1F100. N1680 X1.625 Y-0.75 N1690 M98P8099 .......a bunch more X moves N1890 M98P8099 N1900M9 N1910G0 X10.0 Z5.0 N1920M5
Sub program as follows.....G4 P90 allows 1 full revolution at bottom.
O8099(DRILL SUB) N10G0 Z-1.8 N20G1 Z-2.3 F4.28 N30G4 P90 N40G0 Z-.6 N50G0 Z-2.2 N60G1 Z-2.7 F4.28 N70G4 P90 N80G0 Z-.6 N90G0 Z-2.6 N100G1 Z-3.1 F4.28 N110G4 P90 N120G0 Z-.6 N130G0 Z-3.0 N140G1 Z-3.5 F4.28 N150G4 P90 N160G0 Z-.6 N170G0 Z-3.4 N180G1 Z-3.9 F4.28 N190G4 P90 N200G0 Z-.6 N210G0 Z-3.8 N220G1 Z-4.3 F4.28 N230G4 P90 N240G0 Z-.6 N250G0 Z-4.2 N260G1 Z-4.7 F4.28 N270G4 P90 N280G0 Z-.6 N290G0 Z-4.6 N300G1 Z-5.1 F4.28 N310G4 P90 N320G0 Z-.6 N330G0 Z-5.0 N340G1 Z-5.5 F4.28 N350G4 P90 N360G0 Z-.6 N370G0 Z-5.4 N380G1 Z-5.9 F4.28 N390G4 P90 N400G0 Z-.6 N410G0 Z-5.8 N420G1 Z-6.3 F4.28 N430G4 P90 N440G0 Z-.6 N450G0 Z-6.2 N460G1 Z-6.7 F4.28 N470G4 P90 N480G0 Z-.6 N490G0 Z-6.6 N500G1 Z-7.1 F4.28 N510G4 P90 N520G0 Z-.6 N530G0 Z-7.0 N540G1 Z-7.35 F4.28 N550G4 P90 N560G0 Z-.6 N565 Z0. N570M99 Thank You, Randy
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