"Jon Elson" wrote in message
...
Bob La Londe wrote:
After the long thread on drilling and peck drilling I thought I'ld post
this video for you as an alternative way to drill holes that seems to be
faster than peck drilling for many of my applications. Yes, I'm doing
this dry. The darn day job keeps interfering with my hobbies and I still
have not finished my enclosure. It ramps in at about 5IPM and finishes
the pass at 20IPM. The cutter is turning about 15000 RPM.

http://www.youtube.com/watch?v=dM4LXXNzLYw

I do this all the time. I make many equipment panels that have a wide
range of cutouts
(slots, rectangles and round holes) of varying sizes. So, I just put in a
1/8" solid carbide
4-flute end mill and cut everything but 4-40 and 6-32 holes with one tool.
I have some
routines that generate the G-code for generic rectangles and round holes
posted on
my web pages at http://pico-systems.com/gcode.html

You just fill in the answers and it generates pretty efficient G-code for
the operation.
I then stitch the separate G-code files together to do the whole panel.

Perhaps your router can only handle these feedrates, I generally run about
10 IPM
with only 2800 RPM. For the panels, I use a routine that "trepans" the
hole, cutting just
inside the final dimension, the slug drops out and then it makes the
finish pass. I generally
plunge about .050" each step down with the 1/8" end mill, so I do a 1/8"
panel all the
way through in 3 passes.

How big is your motor?

Its late and the math doesn't make sense. I'll plug it into g-wizard
tomorrow.