Hey Gene, If you were so inclined to make your own touch probe, there is an article in the winter 2011 edition of Digital Machinist that describes a construction project. If interested, send your email address to me, and I will send more information.
--J. Ray Mitchell Jr. jrmitche...@gmail.com "No problem can be solved from the same level of consciousness that created it"Albert Einstein On Mon, Feb 18, 2019 at 9:57 AM Gene Heskett <ghesk...@shentel.net> wrote: > On Monday 18 February 2019 05:53:31 Gene Heskett wrote: > > > On Monday 18 February 2019 02:31:46 jrmitchellj wrote: > > > Perhaps victims of the Trump tariffs! > > > > > > --J. Ray Mitchell Jr. > > > jrmitche...@gmail.com > > I've not seen anything thats blaming that BS yet... > > But I did note that one opto based proximity detector on ebay just now, > no real specs listed but $0.99 copy. But shipping from the Russian > Federation was $30, and delivery estimates were 90 days. If you needed > 10,000 next year, maybe, but 10 yesterday? > > Most of the proximity stuff is designed to work with ferrous, worthless > for locating an alu workpiece. But it sure seems to me that the market > for a $5 sensor, accurate to .001" or better is wide open, and whoever > comes up with such a device will own the market. It exists of course, > called a switch, but would have to be designed for that specific job. > Its not something that you could just turn a G38.2 loose on without some > preliminary fumbling to find the target. Looking for the edge of an > anodized alu panel 70 thou thick is not an easy job w/o some sort of > machine vision. Electrical contact detection in the presence of the > anodic coating only becomes practical when you've a kilovolt to puncture > that coating, or enough mechanical force to damage it and I've neither. > That leaves something resembling a Renishaw. Or machining a pallet > locked to the table for alignment for every part you make, which except > for pcb's you are going to mechanically etch 100's of, has proven to be > a huge waste of time. IMO anyway. This machine with its target being > engraving, may be fast enough that it won't starve the operator. > > Up till now I've always been so limited in feed speeds by the available > spindle rpms that making a pcb resembled watching grass grow in the time > of a drought. With 10x the revs, I ought to be able to carve a pcb at 30 > ipm. There will no doubt be other limits found long before getting to a > 30 ipm average speed. Because the moving parts are lighter than a > conventional mills table, I expect accel's can be pushed some. But thats > something I haven't yet explored, waiting till its moving on all-mesa > i/o, so far its still on a parport and moving 10x faster than the older > HF, with the same driver kit, stolen from it. Same BoB too. > > And I haven't seen an obit for Murphy yet. He must be immortal... :) > > 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> > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
