On Monday 15 February 2016 19:11:10 Jack Coats wrote: > I saw some prox sensors ebay (china trash) that folks on 3D printers > are using for automatic bed leveling compensation. They are about > $2.50/ea delivered, others are $10 if you want a better quality. > > Their repeatability is good,
But hows the velocity vs trip point? Do they lag at the higher speeds, or pre-trip at higher speeds? Never played with any, but could be cajoled if these elcheapo's turn crappy before their time. > > If using switches, please check the brand. Microswitch and possibly > Cherry make great switches. Some others are 'problematic' to be kind. > > Enjoy. > > On Mon, Feb 15, 2016 at 5:57 PM, Gene Heskett <ghesk...@wdtv.com> wrote: > > On Monday 15 February 2016 18:44:00 Bertho Stultiens wrote: > > > Hi, > > > > > > I'm looking for an on-the-cheap way to do reasonable homing. Usual > > > switches for the purpose cost a lot. The machine only has a > > > repeatability of 0.02mm, so it may just be a waste to use too > > > accurate (expensive) switches. > > > > > > Has anyone numbers on the repeatability of "normal" > > > micro-switches? > > > > > > Micro-switches are (relatively) cheap and mostly not too shabby, > > > but I have a not seen any hard data on repeatability (other than > > > datasheets saying that they are made for repeatability). > > > > I am using some micro-mini roller lever junk I got for 6 bucks a bag > > of 10 from ebay. Repeatability according to my dials is well within > > .001" even with crap switches. Its a "dry' circuit, so as long as > > the contacts are clean, there's very little other wear. MMMV after > > a long time, but its not beem noticable in 6 months now. > > > > 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> > > > > > > -------------------------------------------------------------------- > >---------- Site24x7 APM Insight: Get Deep Visibility into Application > > Performance APM + Mobile APM + RUM: Monitor 3 App instances at just > > $35/Month Monitor end-to-end web transactions and take corrective > > actions now Troubleshoot faster and improve end-user experience. > > Signup Now! > > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > 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> ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
