On Wednesday 13 March 2019 18:55:15 andy pugh wrote: > On Wed, 13 Mar 2019 at 22:29, Gene Heskett <[email protected]> wrote: > > Since I've never put a home switch on a rotary, > > Neither have I. It isn't often necessary. If I had something without > rotational symmetry I would probably use a spirit level on the part... > > When I have considered doing it I have thought in terms of a > semi-circular track and an opto-sensor. (so it never takes more than > 180 degrees to home)
In other words, a grey scale with enough opto's it knows where it is w/o moving at all. That would take at least a 10 track code strip. Nice, and speedy on the factory floor but I can turn this a full turn in less than 2 secs, so thats expensive over kill for me. I'm inclined to put a bigger motor and a smaller pulley just to get the holding power if use says I need it. Both the z motor and this rotary look awful puny. But use will tell that tale. One thing I haven't looked around for yet is a small CBN wheel, which with the rotary, would make a heck of a lathe tool sharpener. The only CBN I have now works moderately well in the G0704, but 3 grand is a little slow for a 5" cup, so it does a decent job, but slow, like watching grass grow. A 2.5 to 3", at 24 grand, ought to do that job both fast and well. Just thinking ahead, the horses are far behind the cart just yet. Changing the subject, I got the counter today, nice pocket sized new unit, laid a mylar bag of starkist tuna on it, raised the background 2 a minute, maybe. Thats a genuine never mind. No banana's on hand so haven't checked any of them yet. 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
