On Tue, 2013-12-17 at 20:59 -0500, Gene Heskett wrote: > On Tuesday 17 December 2013 20:51:20 dave did opine: > > > On Tue, 2013-12-17 at 18:32 -0500, John Alexander Stewart wrote: > > > Hello all; > > > > > > 2014 sees me finishing up my lathe conversion to CNC. (Emco > > > Compact-8). > > > > > > I'm a bit "confused" about spindle sensors, and I do see a few > > > different designs. > > > > > > Question - if you had to do it again, what would YOU do for a modern > > > spindle encoder? > > > > > > (trying to learn from those who have gone before me, wish me luck!) > > > > > > PS - I'm tempted to just go for the CNC4PC Index Pulse Card, but maybe > > > there are better alternatives out there. > > > > > > Thanks; > > > John A. Stewart. > > > > Hi John, > > Indeed I hope 2014 does see an operating cnc lathe in my shop. I ripped > > out all the mechanical stuff and started on a cnc implementation of a > > Jet 12 x 40. > > For the spindle I did something dumb which I will need to fix. Used a > > 360 cpr Koyo encoder but geared it (in a moment of dullness) 2:1 so > > index pulses are not unique in angular index. Duh! I geared this with a > > couple of timing pulley and a timing belt. I just need to make room for > > 1:1 so I can use the index without hassle. Yes, I know I could divide by > > 2 but the KISS principle is overpowering. > > > > If anyone has a really neat idea for getting the Z ballscrew aligned > > with the Z axis I'm all ears. > > I bolted up, loosely, the right end bearing, ran it up against the left > bearing and adjusted the nut on the face of the carriage apron to hold the > far end loosely in the correct position. Then ran the carriage to the > right and tightened up the right end bearing where it fell. Then went back > to the left, re-centered the nut in the apron, went back to the right and > let that carrier move ever so slightly. My guess is that it is within a > thou right now. No detectable bind. > > > I hope everyone has time with family over the holidays but also has time > > to work on THEIR pet projects. Good Grief! Winter solstice is Sat. As > > the frog said, "time fun when you are having flies." > > > > Dave
That makes sense, I've just been mentally fighting it. Tnx. Dave > > > ---------------------------------------------------------------------- > > > -------- Rapidly troubleshoot problems before they affect your > > > business. Most IT organizations don't have a clear picture of how > > > application performance affects their revenue. With AppDynamics, you > > > get 100% visibility into your Java,.NET, & PHP application. Start > > > your 15-day FREE TRIAL of AppDynamics Pro! > > > http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg. > > > clktrk _______________________________________________ > > > Emc-users mailing list > > > [email protected] > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > ------------------------------------------------------------------------ > > ------ Rapidly troubleshoot problems before they affect your business. > > Most IT organizations don't have a clear picture of how application > > performance affects their revenue. With AppDynamics, you get 100% > > visibility into your Java,.NET, & PHP application. Start your 15-day > > FREE TRIAL of AppDynamics Pro! > > http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.cl > > ktrk _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > Cheers, Gene > -- > "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> > > "Every morning, I get up and look through the 'Forbes' list of the > richest people in America. If I'm not there, I go to work" > -- Robert Orben > A pen in the hand of this president is far more > dangerous than 200 million guns in the hands of > law-abiding citizens. > > ------------------------------------------------------------------------------ > Rapidly troubleshoot problems before they affect your business. Most IT > organizations don't have a clear picture of how application performance > affects their revenue. With AppDynamics, you get 100% visibility into your > Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! > http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
