On 03/09/2016 09:38 AM, andy pugh wrote: > On 9 March 2016 at 16:54, <[email protected]> wrote: >> The issue is that we drilled about a .130 hole for the index but it acts >> odd. If you rotate the spindle one direction it will pass the index and >> stay high until it passes the hole then you get a little index pulse low. >> If you run it the other direction it goes low after passing the index - and >> you get a positive index pulse at every passing of the hole. > > This may be the internal logic at work. The sensors are rated to zero > speed, and I think have an internal offsetting circuit. However I > can't see how it can tell which way the gear is turning unless it has > two sensors. > Some automotive sensors do actively sense direction, and send a > different pulse length in one direction compared to the other to > encode the direction on a single wire. >
A very quick look at the datasheet seems to indicate that there are two sensors about 2mm apart and that logic may use these to sense whether the gear edge is metal to air or air to metal. I tend to agree with Andy that the chip logic may be the problem. That and six bits may get you a cuppa. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
