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
