03-23-2006 01:35 PM
03-27-2006 12:03 AM
03-28-2006 04:40 PM
03-28-2006 04:50 PM
03-28-2006 04:59 PM
03-29-2006 09:21 AM
Like I said, I'm brand new to Labview and Fieldpoint, but with Rabbit boards, I've taken care of dithering when using proximity sensors and sprocket teeth by using a 3rd prox sensor. The first two are adjusted as close to 90 degrees phasing as possible while observing the signal on a scope. The 3rd is for sanity checking (dithering). It is placed so that it does not see a tooth when the other two would. The gear tooth spacing, gear tooth surface area, and sensor size is such that I have less than a 50% duty cycle.
Of course you could purchase BEI anti-dithering modules or a broadcast board that has anti-dithering features, but they would need that 3rd signal as well because they use an encoder index signal as well as signal conditioning to preclude dithering. But that would at least simplify programming.
03-29-2006 10:59 AM