On Monday 18 February 2019 16:56:38 jrmitchellj wrote: > 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. > [email protected] > Its the from line above, if it survives the list else try [email protected]. I'd be interested in anything thats half the size of a renishaw.
Thanks J. Ray. > > "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 <[email protected]> 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. > > > > [email protected] > > > > 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 > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
