Ideas: 1) How close to the motor is the sensor. The motor might have a large external magnetic field.
2) I wonder if the shaft is magnetized while is spinning? Is this reversed if the shaft spins the other way? 3) Is the sensor powered from a reliable DC supply that is in no way connected or near the motor spindle power? On Wed, Mar 9, 2016 at 8:54 AM, <sa...@empirescreen.com> wrote: > We purchased some gear tooth sensors in hopes of using one of the gears in > the K&T for a spindle encoder. Well - we ended up putting a shaft encoder > in the gearbox. > > http://www.digikey.com/product-search/en?keywords=620-1328-1-nd > > Well - move ahead a few years - We are putting a gear in the matsuura > spindle for an encoder. the 2 sensors on the gear seem to work great for > quadrature signal. > > http://electronicsam.com/images/matsuura/sensors.jpg > http://electronicsam.com/images/matsuura/oscope.jpg > > (that is 6000rpm) > > > 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. I think it > should stay low (or high) no matter what direction the spindle is turning > (and get a pulse every pass of the index hole). > > clear as mud? > thanks > sam > > > ------------------------------------------------------------------------------ > 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 > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
