I have now put 2 ATD667LSG's on this block and have failed to get a working index pulse into linuxcnc thru the encoder index pin of a 7i76D.
I've mounted it branded face against a block of alu, with a green 3 pin socket to allow unplugging it quickly, and I jbwelded a piece of a nail to the side of the drawbar cap/bolt retainer at the top of the spindle, but I can't get a false out of it at any orientation of the nail or a tool waved past it. I've tried 2 new ones now, and they appear to be stuck high/true when the connector is made up, but goes false about 1 second after unplugging it. Attempting to measure the current gets a worst case of about 1.2 u-amps to ground, and that is not enough to pull it down to false unless the dvm is replaced by a short to ground and shows zilch current to the 5 volts. Trying to measure input current by inserting the dvm between its output and the encoder-index in looks like a small capacitor charging, but drops to zero current in nominally 1 second and stays there. W4-W5-W6 have been tried both ways, but to the left s/b ttl and everything except the ATS667 is ttl. Its supposed to be able to sink 25 ma up to 70 ma with a 12 volt supply, but its only getting 4.92 volts. 3 of them have been working on 5 volts on the lathe for going on 3 years. Worked fine till the goop went to hell because it dissolves in 0-W20 synthetic spindle oil. I'm bumfuzzled. Obviously I'm doing something wrong but what? 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) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
