On Tuesday, February 07, 2012 02:23:02 PM Jon Elson did opine: > gene heskett wrote: > > For stuff like this, it seems I should just buy an index of #10 to #70 > > carbide drills, but so far all I have found in the catalogs are TiN > > HSS stuff. > > > > Anybody here know of a supplier for carbide drills in teeny wire > > sizes? > > Just look on eBay, there are a bunch of guys usually selling small packs > of assorted > 'circuit board drills'. If you want exact sizes, that is a problem, but > they usually sell > an assortment of usable sizes. You need a spindle that runs REALLY true > and has > no Z-axis bobbles or wiggles to the side when it reverses. I've drilled > down to > .018" with an air-bearing spindle, but that is getting tricky. > > Jon I would think I can probably do that here Jon, since pcb-gcode uses the engraving bit to spot a starter dimple for the following drill operations. When I was off a couple thou, I've seen a #67 drill actually bend and use the marked spot a few times. At 18 thou, I expect I'd have to drop the Z feed rate from 6 ipm now though. My spindle is about 100k revs too slow. :-\
Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> I predict that today will be remembered until tomorrow! ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
