Incremental motion in one axis is all I want anyway. Fig 11 in the datasheet is perpendicular deviation during a straight move, so I don't think that will apply. I imagine there will be some error, but the price and simplicity have me interested at the present. I think I'll order a couple anyway. I want to see how they compare to the AS5311 linear magnetic encoders I've used before. I like those pretty well, but it is a real pain to obtain magnetic strips for them, and they have a high latency (which may be a problem with these optical sensors too).
-- Ralph ________________________________________ From: Dave Caroline [[email protected]] Sent: Wednesday, March 12, 2014 3:04 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] ADNS-9800 optical sensor Remember this is a movement sensor not an absolute measure of distance see fig 11 for some indication of error. Dave Caroline On 12/03/2014, Joseph Chiu <[email protected]> wrote: > That's a nice item since it comes with the lens. I started down the path > of making a paper flow detector using one of the ADNS sensors many years > ago, but got hung up on being able to get a suitable lens for the > particular application. Just make sure that the lens works in the geometry > you have planned! > > > On Tue, Mar 11, 2014 at 7:27 PM, Ralph Stirling < > [email protected]> wrote: > >> I'm interested in using an optical mouse sensor in a position >> feedback application. Older sensor designs often had quadrature >> A/B signals, but the newer sensors like the ADNS-9800 have an >> SPI interface. I have found a place that seems to have one >> of these devices for sale, mounted to a circuit board. >> >> >> https://www.tindie.com/products/jkicklighter/adns-9800-optical-laser-sensor/ >> >> My question (probably answerable by PCW), is whether the SPI >> firmware component of the 7I43 (or other Mesa cards) can be used >> to read one of these, without a lot of custom vhdl (which I don't have >> time for at the moment). I'd like the 7I43 to interrogate the ADNS-9800 >> about position change every servo period. >> >> Anybody tried something like this? >> >> Thanks, >> -- Ralph >> >> ------------------------------------------------------------------------------ >> Learn Graph Databases - Download FREE O'Reilly Book >> "Graph Databases" is the definitive new guide to graph databases and >> their >> applications. Written by three acclaimed leaders in the field, >> this first edition is now available. Download your free book today! >> http://p.sf.net/sfu/13534_NeoTech >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> > ------------------------------------------------------------------------------ > Learn Graph Databases - Download FREE O'Reilly Book > "Graph Databases" is the definitive new guide to graph databases and their > applications. Written by three acclaimed leaders in the field, > this first edition is now available. Download your free book today! > http://p.sf.net/sfu/13534_NeoTech > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
