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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
