For linear encoders there is usually a reference signal every few mm. It's in the specs how many mm/inches it's apart, but you can probably measure it. It serves the same purpose as the reference signal on a rotary encoder (that one also repeats along the complete travel quite a few times).
Regards, Alex -------------------------------------------------- From: "Pat Lyons" <[email protected]> Sent: Saturday, November 14, 2009 11:31 PM To: "Enhanced Machine Controller (EMC)" <[email protected]> Subject: Re: [Emc-users] Anilam linear encoder OUTput... > they're linear encoders though. that's what I can't seem to make sense > of... > > thanks > -pat > > On Sat, Nov 14, 2009 at 4:12 PM, Gene Heskett > <[email protected]>wrote: > >> On Saturday 14 November 2009, Pat Lyons wrote: >> >Ok- so I o-scope'd the mystery wire again this time while taking the >> >table >> >through it's entire length of travel to find that the signal has a few >> >places where it blips high. My question is, if an index signal on these >> >encoders is supposed to give a position reference, why would there be >> >more >> >than one??? >> > >> >Thanks for any info! >> >-Pat >> >> There should be one, and only one, per revolution of the encoder shaft. >> >> -- >> Cheers, Gene >> "There are four boxes to be used in defense of liberty: >> soap, ballot, jury, and ammo. Please use in that order." >> -Ed Howdershelt (Author) >> The NRA is offering FREE Associate memberships to anyone who wants them. >> <https://www.nrahq.org/nrabonus/accept-membership.asp> >> >> If you have to hate, hate gently. >> >> >> ------------------------------------------------------------------------------ >> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 >> 30-Day >> trial. Simplify your report design, integration and deployment - and >> focus >> on >> what you do best, core application coding. Discover what's new with >> Crystal Reports now. http://p.sf.net/sfu/bobj-july >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > ------------------------------------------------------------------------------ > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 > 30-Day > trial. Simplify your report design, integration and deployment - and focus > on > what you do best, core application coding. Discover what's new with > Crystal Reports now. http://p.sf.net/sfu/bobj-july > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.425 / Virus Database: 270.14.64/2501 - Release Date: 11/13/09 > 18:22:00 > ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
