On Wednesday 25 November 2015 18:26:15 Gregg Eshelman wrote: > On 11/25/2015 8:36 AM, Gene Heskett wrote: > > Now if someone could suggest a feed rate for 2500 revs on a 2 flute > > thats not digging near as deep on a per pass basis? When I have 132 > > of these in 1/2" square to make for the upper portion of these > > boxes, I don't want to spend a week making them because the feed > > rate times number of passes is too slow. Its over 33 minutes for 4 > > of these right now if there aren't any hiccups. > > You might be able to remove the broken tool with some dental picks. > Harbor Freight Item #93514 $3.99 6 piece set or ask your dentist for > some old/broken ones you can sharpen.
I re-wrote the code to skip over it, and when I had broken it off, there was no tool bit there. But there was something with a hint of a metallic shine to it. Filed & sanded to shape, that chip will be usable. > 2500 RPM for a 1/32" diameter bit is extremely slow, even in wood. > > Google toolstoday feed speed wood > > May want to just spend the $ on 1/32 end mills which should handle > side loads better than PCB drills. Possibly. But ATM its moot, the spindle driver or something controlling it has decided to take the holidays off. And since that power box is about 50 lbs, hoisted to a high shelf, means I'll have to rig my deer hoist and get it back down onto a table before I can open it up & stick the scope probes here & there. But my back is done for the day, so its tomorrows project to start. > http://forum.vectric.com/viewtopic.php?f=28&t=20415 > > I had an awful time milling a 14DP gear in steel with 1/16" and 2mm > and smaller mills at 5000 RPM. Broke all those I had by the time I got > the gear finished. If I had the 10000 RPM version the job could've > been done in half the time and probably wouldn't have broken so many > end mills. > > I've been thinking on making a high speed spindle to mount to the side > of the head on my PLM2000 with a 1:2 step up belt drive. One locating > point would be the 1/4" spindle lock pin hole. The rest I'd have to > make a bracket to bolt on. > > Something you could try with those teeny mills is get a really good > variable speed rotary tool and make a mount to attach it to the side > of your mill head. Make a lot of shallow, high RPM, high speed passes > to save the cutters. Like a Proxon? Dremel I know, has crap for rigidity in the spindle as its in a rubber mount, independent of the motor shaft. I think I'd druther get one of the Chinese 48 volt dc drives. But you guys said the runout is atrocious. I'll look around some more though. Thanks Gregg. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Go from Idea to Many App Stores Faster with Intel(R) XDK Give your users amazing mobile app experiences with Intel(R) XDK. Use one codebase in this all-in-one HTML5 development environment. Design, debug & build mobile apps & 2D/3D high-impact games for multiple OSs. http://pubads.g.doubleclick.net/gampad/clk?id=254741551&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
