update
Well its safe to say, what ever engine the Megabar will have
it will have some ass.
We spent all night trying to cut the two parts below
and every thing was going well till the cutter running
at 350in/min knocked off a large section of the fuse.
It was not a error, it was just not glued down well
enough. (my fault, long story)
We also had some problem getting the machine to cut
such a large part. There was only 0.300" to spare out
of 38".
Tonight we decided to just cut one part at a time. I made a
stack of nine 3/4 inch boards of MDF. Drilled five 5/8 holes
through the 7 inches of wood and inserted five, 1/2" all tread
rods. After gluing together, nuts were tighten to smash
the boards together a tight as possible. Later the all tread
was removed and replaced with 5/8" dowel rods..
This smaller part took 60,000 lines of G code and was finished
in 1:20 flat using a 2 inch fly cutter at 350 in/min at 5100 rpms
with a depth of cut of 0.175. Then two different finish passes
of the 1" ball endmill, 8 inchs long at 7000 rpms
The part came out perfect.
I will have some pics tomorrow after we cut the other side.
Eddie Weeks