On Wednesday 18 November 2020 12:21:20 Ralph Stirling wrote: > Sounds to me like a 74HC14 schmitt trigger would > be a better solution than brute force pullups. A little > square of perf board and six wires would do it. > > -- Ralph
True, except this Sainsmart BOB already has that. I found a small capacitor on its inputs that I am going to remove tomorrow. I can measure it at 97.5 nf at any input. That, combined with Sainsmart running some gawdawful brite grain of sand leds from the logic one of the input is the main problem. I don't have that much noise as my cable is all shielded and grounded to a common point, I don't see enough noise to bother it considering there is also a 74HCT140 Schmidt trigger before it gets to the encoder in the 5i25. The quad error flag will tell me quick enough if there is noise enough to bother it. Mach, from the drawings I've seen, only uses those inputs for probe and homes. [...] While I was out there, I removed the water line nuts from the 6040 motor, probed into it with a long thin driver dislodging quite a bit of junk, some of which stung my hands when I alternated blowing thru it with the air hose, which I alternated directions several times. Had to cut off about 7" to get to good hose, found the hole blown in the side of the hose a couple inches above the motor. Then pulled about a foot thru the cable chain, tightened it all back up and dumped the slightly dirty water & put 2 gallons a fresh distilled in it to cover the pump. And I'm seeing more water back into the tank than I have seen in a year. The stream is now a good big coffee cup a minute, up from a quarter inch in the bottom of the cup, so its at least partially restored, well enough to finish the next stage of the motor mounts tommorrow without cooking it again. Thank you Ralph. 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-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
