On 30 Jul 2015, at 03:51, Gene Heskett wrote: > I bought a bag of small, roller tipped microswitches, and have a couple > mounts laid out but not carved yet. > > Going thru searches on ebay just now, for both inductive, capacitative, > and IR proximity switches, It sees like the majority of them are needing > 6 volts or more, and around 300 ma each to function. Having seen some > micropower capacitative switches in the textbooks of yore, it seems like > the ball has been dropped in terms of being useful in a 5 volt logic > circuit. > > Both the microswitch, and the inductive versions would seem to be > sensitive to collecting swarf, particularly if its a rare earth magnet > running a reed switch. > > My lathe seems to be relatively happy with a microswitch located under > the back edge of the bed for Z homing where swarf tends to fall on past > it, but x has to be kept swept clean because its actually on top of the > carriage. > > I see a whole passel of stuff drilled onto GO704's in the hits I can get > from google, but all of them preclude retaining the rubber swarf > shields, which I'd say was not worth the tradeoff. There has to be a > better way. > > So what sort of switches, and what swarf shielding to keep them > relatively clean & accurate are others using? > > PM's with pix appreciated if you have the time. >
Actually, this is a really interesting question. Having spent ages thinking about shielded locations for the mill, and about to do the same for the lathe, it would be useful if folks could put the pictures somewhere we could all see them. If anyone has any recommendations about makes and models of switches/sensors which provide better accuracy and repeatability than others, or useful ways of providing adjustment on mounting arrangements, that would also be very useful. Marcus > Thanks. > > 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
