On Wed, Apr 25, 2007 at 09:25:34AM +0200, Marc van Doornik wrote: > > Of course, you could also use just a "simple" plunge arrangement, with a > probe sliding up and down. However, you should probably ALWAYS use a > normally closed switch config. That way, you can use a rigid switch for > higher accuracy, while still giving the probe room to "give way" when > the machine decelerates.
The active parts of an optical mouse could make a reasonably sensitive "simple" plunge detector? The 1600 dpi resolution from a Logitech, or just 0.001" resolution from a Razer Viper might be enough. It'd only be necessary to position the sensor beside the sliding probe. Scuffing or painting would be needed on the scanned section. If finer sensing is needed, a lever could amplify the motion. Again, the mouse sensor only needs to see stuff move close by. If the surface gradients allow, one might be able to digitise by skating the probe, and counting the vertical deflections. (To avoid bending things, only skate downhill?) Hmm ..., might make a neat edge finder, in that we could count the overshoot, and back off appropriately. Erik ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
