On Monday 12 September 2016 23:08:53 Gregg Eshelman wrote: > Why not use twisted pair ethernet cable? > Because its single strand solid and supposedly fragile? The ribbon is 7 strand & able to stand more flexing.
And I found, at Wallies of all places tonight, some glue pens that dispense uv setting resin with an included uv light to cure the stuff. I intend to make some use of that to prevent wandering wires from wandering while they are inside the headstock. > > > From: Gene Heskett <[email protected]> > To: [email protected] > Sent: Monday, September 12, 2016 11:43 AM > Subject: [Emc-users] output sink of the 667 hall effect? > > Greetings all; > > I see by the spec sheet that the allegro 667 gear sensor can sink up > to 25 mills. > > But with 3 such sensors on the end of a long cable back to the > breakout board, probably 7 foot by the time I get it routed, I am > concerned with the potential for crosstalk noise in spite of putting a > bypass capacitor on the encoder itself. > > This noise would be reduced by a lesser amount of current. So, for > those of you using this device, what value is the resistor are you > using for a pullup at the breakout board? > > And if using a piece of idc ribbon cable, it seems to make sense to > put a grounded wire between each of the A|Z|B conductors, making that > a 7 conductor cable rather than a 5. I have around 90 feet of 26 wire > ribbon I can split off what I need from. > > Good idea? Or off the wall & probably will be plagued by noise if I > shoot for a 10 milliamp pullup with a 470 ohm pullup, or even 5 mills > with a 1k pullup. > > Time to assemble that motor driver box I believe. > > > ---------------------------------------------------------------------- >-------- _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
