Note the next row begins where the previous one ended, to minimize air travel. Then
G83 -------- z-1.L0 The L0 keeps from drilling the first hole twice L201
G83 ------- z-2.L0 L201
til you reach z-6.75.
By the time you get back to the first hole, it should be cool. Essentially each new drill cycle is a new peck. What those pecks should be is another story. Then, of course you can peck within each drill cycle.
You also have the option of sharpening the drill between each new drill cycle, as well.
One problem tho is you don't want chips falling back in to previously drilled holes, so you may want to pause and blow shit out pretty good, or have a really good stream of coolant blasting straight down, one hole ahead or sumpn.
You can also do blocks of holes in a macro, but it proly isn't worth figgering out here. For hundreds of holes, mebbe.
Holy shit, $80 for that drill! Good gawd....
I think someone here posted recently about carbide tipped drills, as well. Give yer local supplier a shot at pricing this. MSC, McM, et al have markups of 2-300%. iow, what you pay them $3 for you can get for $1.
Hole patterns in subroutines is esp. efficient for the spot/drill/tap process. Using Lxxx, you cain't make a mistake going from spot to drill to tap. I use Lxxx for almost everything except one single x0y0!
Randy, I would center drill, drill as deep as possible with a parabolic jobbers drill, and then switch to the extra long drill for the final depth.
I would start around 600 RPM and .006-.008 feed per rev.
On deep hole drilling I don't use the canned peck cycle because the pecks are too small at the start and too big at the deeper depths.
Here is a sample program of a hole that I drill in alum. The hole has been pre-drilled 1 1/2" deep with a jobbers drill. Drill I use is a Titex parabolic flute. Part is about 10'' long and gets drilled from both ends to create a thru hole. Miss match on the holes is about .010, but not a problem as air is blown thru for cooling.
AND, you can put this non-canned cycle into a kind of "can", by putting it into subroutine, and calling that. Then you have super-control with peck depths, and, as you showed, feeds as well. Also rpm, iffin you wanted to vary that with depth.
The only problem, from a programming pov, is that now you have to call this thing 64 times, for each hole position, as opposed to issuing one L201(with all the hole positions) under a G83. No real biggie, tho, given the super-control.
------------------------------------------- He that will not apply new remedies, must expect new evils: for Time is the greatest innovator: and if Time, of course, alter things to the worse, and wisdom and counsel shall not alter them to the better, what shall be the end?
Francis Bacon (1561-1626), English philosopher, essayist, statesman. Essays, "Of Innovations" (1597-1625).