This is related to the original thread;http://forum.vectric.com/viewtopic.php?f=35&t=26669&p=191644&hilit=chinese+ball+nose#p191644
And I bought the ones Randall showed;
I can only say for these bits, but I've been playing...and they're performing better than I thought, and was thinking to post some pics and info as we all like actual pictures of results
Primarily using the smallest of the four in the set which is the .25mm Radius;
They're not as delicate as you would think, as I DROVE one full length into Hard Maple by mucking up where I Z'd an offset toolpath of Mike S's "Moon" he was kind enough to make for me....other than having to remove the smoke/carbon from it...no damage under my 10X loupe visible:)
I did a couple of Tiny "Moons" just to judge feeds/speeds/stepover, and then set the bits aside till this week.
The first real test was a .26" deep "Celtic Dragon" by Michael Mezalick in Claro Walnut and I loved it!
I cheated the Z down in .1" increments, and did a couple lines of the file, then dropped in .1" increments repeating, until I was at original Z.
(It's easy with Shopbot's M(ove) N(udge) X,Y,Z axis Zeroes, and R(eplay) R(ecent) comand....not sure if Mach has comparable?)
Claro was raster cut (in IPS) at 1.5,1.5, 16K at 3% stepover against the grain as just a finishing toolpath as the file just cut stepover, and didn't jump around.
All pictures are straight off the machine, with nothing but a blast of 90PSI, and a medium stiff brushing.