Hi Ray, Guys.... The US digital encoder edivide box passes the index pulse straight through. I have an encoder on the spindle of my lathe but I am not sure what the resolution is - I'm guessing it is 2500 PPR just like the feed axes. That makes for a pretty short index pulse. Will the EMC2 engine just wait on a threading cycle until the index pulse is seen, and once it is seen, start the cycle?
Thanks, Dave >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Ray Henry wrote: > You might have a look at > > http://www.usdigital.com/products/interfaces/encoder/converters/edivide/ > > Something like this would allow you to experiment with speed vs > resolution and still keep the encoder you've got on there. > > > On Sun, 2009-08-16 at 10:51 +0100, Steve Blackmore wrote: > >> Hi Guys, what's a realistic number of PPR for a lathe spindle encoder >> via a parallel port in EMC. Spindle is capable of 3500 rpm. >> >> My home made encoder had 90, but I've altered the drive system and >> fitted a 1024 PPR encoder with index. Output is via differential line >> drivers. >> >> I've changed the scale factor but it starts loosing pulses at 600 rpm or >> so?? >> > > > > > ------------------------------------------------------------------------------ > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day > trial. Simplify your report design, integration and deployment - and focus on > what you do best, core application coding. Discover what's new with > Crystal Reports now. http://p.sf.net/sfu/bobj-july > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
