Hello guys, I'm testing a phisical encoder to simulate how the spindle will work with the external offsets. So far so good but I need to clarify something that I suspect. Here it comes:
The encoder I'm testing is an ERN471 from Heidenhain. A beast of encoder. It says 5.000 line counts on the datasheet but also says it outputs 125.000 signal periods per revolution, so when I read it in LinuxCNC with a scale of 1 I find that I'm having 500.000 pulses per turn. A lot of resolution. I'm scaling it to 1024 since this is what I have on the Mazak. My concern is (and I think this is to be expected) that I have missing index pulses if I rotate the encoder too fast with my fingers. I tried to use a shorter servo-period and that seemed to improve things a little but not solving the problem always. Is this what's happening? Should I not expect this behaviour with the 1024 PPR encoder and the spindle turning at about 200 RPM ? I would like to hear your thoughts just to be relaxed, since a missing index pulse on this kind of processes is likely to break the tool and spoil the part. Thanks as always! _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
