Thanks, I should have been more accurate in my initial description. It is a hall effect sensor.
Scott On Sun, Nov 11, 2012 at 6:34 PM, Bruce Layne <[email protected]>wrote: > > On 11/11/2012 03:00 PM, Scott Hasse wrote: > > > ...plus a magnetic reed switch that triggers once per chuck revolution. > > I wouldn't use any mechanical switch in that application. There's a > chance it won't be able to respond fast enough at the faster spindle > speeds, but I'd be much more concerned about reliability. Most > mechanical switches are rated for mechanical life, independent of > contact wear from making and breaking current. Even with no current > flowing through the switch, most switches are rated for something in the > ballpark of 100,000 to 1,000,000 switch activations. That's a lot if > you're pushing a button, but if you're racking up 2000 switch > activations per minute for the spindle index pulse, you'll reach 100,000 > in 50 minutes of spindle time. > > I'd be looking at a solid state switch with no moving parts... either a > Hall effect switch for that magnet, or I'd use a slot or a hole in an > opaque disk with an optical interrupter. > > > > > ------------------------------------------------------------------------------ > Everyone hates slow websites. So do we. > Make your web apps faster with AppDynamics > Download AppDynamics Lite for free today: > http://p.sf.net/sfu/appdyn_d2d_nov > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_nov _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
