Thanks, that look good. Does the EMC2 tracking the actual position, assume sometimes the stepper lost a step or so, with parallel port communication, how does one feed the optical encode position info back to the computer?
-- Youda On Fri, Sep 4, 2009 at 6:35 PM, Gene Heskett <gene.hesk...@gmail.com> wrote: > On Friday 04 September 2009, Youda He wrote: > >Thanks, it seems most computer works, especially the Intel Atom worked > > well. Do we have drawings to connect parallel port to step driver? We > > have some Allegro chip that takes pulse, direction and will do the rest > of > > driving. > > That is available as a ready made unit, 3 or 4 channels(motors) wide, from > xylotex, google for it. > > I have both a 3 axis and a 4, and within its limits (2.5 amps/motor) and 30 > volts max for the psu, it works quite well. It will need active cooling, > so > I made a box a few inches longer than the board, and the same square as a > common psu fan, one in each end of the box, one blowing in and of course > the > other end is sucking the warm air out. That also works well. > > >-- Youda > > > >On Fri, Sep 4, 2009 at 12:21 PM, Peter C. Wallace <p...@mesanet.com> > wrote: > >> On Fri, 4 Sep 2009, Youda He wrote: > >> > Date: Fri, 4 Sep 2009 11:42:21 -0700 > >> > From: Youda He <yo...@geometrysystems.com> > >> > Reply-To: "Enhanced Machine Controller (EMC)" > >> > <emc-users@lists.sourceforge.net> > >> > To: "Enhanced Machine Controller (EMC)" > >> > <emc-users@lists.sourceforge.net > >> > > >> > Subject: Re: [Emc-users] What hardware should buy to start > >> > > >> > Thanks, do we need to consider what CPU performance level is needed, > >> > P4, Core2, GHz? memory size? > >> > > >> > -- Youda > >> > >> Probably 1 GHz or greater, 256M or more of RAM. If you are using > software > >> step > >> generation, for example with a parallel port driving the step motors, > the > >> main > >> issue will not be the processor speed, but be the latency of the PC. > This > >> may > >> require some fussing about with video cards, disabling SMI, or choosing > a > >> different motherboard. The wiki lists some known good motherboards: > >> > >> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Latency-Test > >> > >> Peter Wallace > >> > >> > >> > ------------------------------------------------------------------------- > >>----- 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 > >> Emc-users@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > > >--------------------------------------------------------------------------- > >--- 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 > >Emc-users@lists.sourceforge.net > >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) > The NRA is offering FREE Associate memberships to anyone who wants them. > <https://www.nrahq.org/nrabonus/accept-membership.asp> > > Justice, n.: > A decision in your favor. > > > ------------------------------------------------------------------------------ > 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 > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
