I have used these on a competition robot before. They were set up to detect sprocket teeth. Worked great until the mount got a little loose, then it got ground to dust (the magic smoke leaked out at that point).
Ray --J. Ray Mitchell Jr. jrmitche...@gmail.com (818)324-7573 A foolish faith in authority is the worst enemy of truth. - Einstein On Wed, Nov 21, 2012 at 9:53 AM, andy pugh <bodge...@gmail.com> wrote: > I have a rather interesting datasheet from Allegro. They have a sensor > that detects either a magneic codewheel, or a gear tooth (with a > biasing magnet behind the sensor). > The neat part is that the pulse width is 45uS in one direction, and > 90uS in the other. > It is intended for crankshaft sensing, where index is done by a missing > tooth. > > The typical code-wheel is a pressed steel part 100m diameter with a > 70mm bore. This is pressed on to a hub with a 30mm bore in the case of > the one I have on my desk at the moment. > > The encoding scheme seems compatible with software/parport sensing, > and the form-factor seems ideal for a lathe spindle encoder. > > I wonder if it is worth adding support to the encoder driver? > > -- > atp > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto > > > ------------------------------------------------------------------------------ > 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 > ------------------------------------------------------------------------------ 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
