On Wednesday 21 November 2012 17:49:39 andy pugh did opine: > On 21 November 2012 21:10, Gene Heskett <ghesk...@wdtv.com> wrote: > > A 100mm wheel is a bit large for my small lathe, but probably fine for > > the 9" and up stuff, and if its quadrature direction sensing too, or > > 2 sensors could be made so, then it sounds like something that would > > be a heck of a lot less fuss to install & make work. > > Perhaps I wasn't clear enough. It very cleverly encodes direction in > the pulse train. > (with stop-start cars it is important not to lose crank-synch if the > engine rocks back on a start, so you can fire on the first TDC without > waiting for the index) > So, you get direction and index all on one channel.
Ahh, so. Do you have a link so we are on the same page with our thinking? Am I to understand that turning one way its a 90 degree duty cycle for a single tooths full passage, but its only a 45 degree duty cycle when turning the reverse direction, or some such? Suitable logic could then decide on the first edge going by, which direction it was turning. That sound like the logic must be able to follow the speed variations from say 50 rpm cranking, to Junior has his foot in it and the tach says 11.5k. Sounds like a pretty tall order from here, without the app sheet in front of me. Thanks Andy. 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) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! All I kin say is when you finds yo'self wanderin' in a peach orchard, ya don't go lookin' for rutabagas. -- Kingfish ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
