On Tuesday 27 September 2016 09:29:47 Ken Strauss wrote: > The discussion has been regarding the optically coupled probe. Has > anyone had success with the inductively coupled ones? Is it feasible > to make your own IMM module?
I'd have to say you could, but these machines are generators of a large amount of magnetic noise. So I'd say not magnetically coupled, but radio coupled just to get above the frequency of the machines own noises. I'd have to assume something that used a very high carrier frequency just to get above all the harmonics of the pwm and stepper pulsing noises. Any great amount of power would require it be put, frequency-wise, is some band the fcc or whatever control agency is governing your locale, has allocated for that. That wants to point at bluetooth. Bluetooth stuff has a range of 10 feet or so, but thats so noisy it would require you to invent your own protocol just so nearby computer mice and keyboards wouldn't have the right checksums of their packets to register. But it is by now a well developed, cheap technology. And I've no clue what the latency would be, but quite likely much more than a direct electrical contact would have. I debounce 2 servo cycles, so thats a 3 millisecond lag worst case which means I double touch, the second at low feed speed. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
