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
