Check out something like a Honeywell 1GP4001. They are in a sealed can with the back bias magnet. Digikey has them for about $7. There are other models and more expensive housed models also. Some are good down to zero speed, some are not. I can find out more info if you like. I design speed and position sensors there.
Tony Disclamer: My views do not reflect those of my employer. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kirk Wallace Sent: Monday, December 03, 2007 12:26 PM To: Enhanced Machine Controller (EMC) Subject: [Emc-users] Magnetic Geartooth Sensor for Spindle Has anyone tried using a magnetic sensor such as a crankshaft position sensor for a spindle encoder? I would not have to protect this arrangement nearly so well as an optical system against oil and dirt. Initially, I found this part - AKL001-12E: http://www.nve.com/Downloads/gtsensor_catalog.pdf The "gear" and bias magnet would be easy to make and mount. I guess the tricky part is in dealing with the analog nature of the sensor, which means more than one or two components to wire, but no big deal. -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending) ------------------------------------------------------------------------- SF.Net email is sponsored by: The Future of Linux Business White Paper from Novell. From the desktop to the data center, Linux is going mainstream. Let it simplify your IT future. http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- SF.Net email is sponsored by: The Future of Linux Business White Paper from Novell. From the desktop to the data center, Linux is going mainstream. Let it simplify your IT future. http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
