On Friday, February 17, 2012 11:46:19 PM Jon Elson did opine: > gene heskett wrote: > > What I have ATM looks like it is about 60-65% blocked, 35-40% open for > > slot width vs web width between the slots. > > > > These devices claim a 0.060" aperture, and these slots are perhaps > > 0.070" wide, with a slot spacing of about .155", so I'm thinking I > > need more block than open to get about a 50% duty cycle pulse out of > > it. > > What I'd do is rig the slot sensor to a mill, and use the table to run a > representative > blade through, and see where the sensor switches. If the blade was, say > .050" wide, and the switching points were .060" apart, then you know it > "expands" the blade by .010", so that is apparently the width of the > optical slot in front of the photocell. > > Jon
That sounds like one way Jon, thanks. That aperture is already spec'd at 60 thou. I need to raid my junk box for a 5 volt wall wart to power it with and at that point I may as well cable it to the scope & see what it looks like just holding it straddling the disk, turning at a couple hundred rpm's since it (the disk) is already installed on the lathes spindle. ATM, the 5 volt wall wart might be the hardest thing to find. I'm a certified pack rat, but most of what I have squirreled away are 9 & 12 volt stuff. I think... :( Thanks for the idea Jon, lots of ways to use up one of a cats 9 lives. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> The world is full of people who have never, since childhood, met an open doorway with an open mind. -- E.B. White ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
