On 03/26/2016 03:47 AM, Nicklas Karlsson wrote: > > I guess this signal both equal also could work for other cases like connector > problem but these signals are usually not available in linuxcnc so it is not > possible to care about them at this level. > > If one sensor on an encoder were to fail, then it would appear to just be dithering back and forth over a small distance, less than 4 encoder counts. So, comparing the absolute value of encoder to tach would detect that as well. So, broken wire, failed detector, failed bulb, broken encoder shaft or disc would all be detected by this method. The comparing the complementary outputs would detect most broken wire cases as well as burned out light bulb.
Since A-B was used on some really LARGE machines, safety did become pretty important. Jon ------------------------------------------------------------------------------ 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=278785351&iu=/4140 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
