A lot of vendors twist verbiage about what is what. If it is TTL then it should be singled ended - ala - the voltage output will vary between something less than .7 volts as a low value and something above 3.7 volts as a high level. The A not will simply be the inversion of the A signal, but the signal will still vary between something less than .7 volts and something above 3.7 volts. A line driver (typically described by the line driver chip that is emulates) is usually a bipolar signal at the output and the receiver is a differential amplifier. The combo is much more noise immune than a single ended TTL type encoder output which can easily be corrupted by common mode noise. The two (line driver and ttl ) are generally not compatible. However there are chips that you can buy that will convert a TTL single ended signal to a line driver output and visa versa.
Dave On 2/7/2016 9:55 AM, r...@superiorroll.com wrote: > We do need the whole pendant, I found these same ones on eBay, with a 2-3 > week delivery. The ones we normally buy are 3-4 weeks, and cost $150 plus > shipping. > > We broke the stems off of the selector switches on one of the pendants on one > of our turning centers, so I stole the unit off of our machining center > temporarily. > > The selectors are pcb mounted, and I'm not near talented enough to unsolder > the 13 little pins out of the sockets, and solder the new ones back in. > > Rick > > > > -------- Original Message -------- > Subject: Re: [Emc-users] MPG Handwheel for use with 7i73 > From: "John Thornton" <j...@gnipsel.com> > Date: Sun, February 7, 2016 7:45 am > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > > Do you just need the MPG or a pendant? I thought AliExpress was for when > you didn't need something in a hurry... > > JT > > On 2/7/2016 6:28 AM, r...@superiorroll.com wrote: >> Just wondering if anyone has had a chance to look at this, all the units we >> already have in service have a "Line Driver" type output, this says "TTL", >> but they are out of stock of the ones we use, and I need one pretty quickly, >> >> Thanks >> >> Rick >> >> >> -------- Original Message -------- >> Subject: MPG Handwheel for use with 7i73 >> From: "Rick Lair" <r...@superiorroll.com> >> Date: Tue, February 2, 2016 2:01 pm >> To: "Emc Users" <emc-users@lists.sourceforge.net> >> >> This is mainly directed at PCW, but after looking at this, >> >> >> http://www.aliexpress.com/item/CNC-Pulse-Generator-4-Axis-MPG-Pendant-Handwheel-Emergency-Stop-for-Siemens-FAGOR-GSK/2009058806.html?spm=2114.01010208.3.1.ZvKjv2&ws_ab_test=searchweb201556_6,searchweb201644_2_505_506_503_504_502_10014_10001_10002_10016_10005_10006_10003_10004,searchweb201560_2,searchweb1451318400_-1,searchweb1451318411_6449&btsid=3161ee1c-584a-403d-94ec-f8a52a7c24f0 >> >> >> Will this be an acceptable handwheel to use with a 7i73? >> >> It says >> - Required 5V+, 150mA, power for MPG >> - Phase output is A ,/A and B,/B; >> - TTL output, drive capability +-20mA; >> >> Not sure about the "TTL" part ???? >> >> > > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
