Been reading through some old stuff recently and found the graphic I put in pastebin at http://imagebin.ca/view/clpgA5sW.html. It was in the graduate theses that Sagar wrote on his EMC propelled SCARA robot. IMO the zero torque portion of the speed/torque curve on the full step graph ought to say something to those of us that care about stepper motor position control.
Rayh --- [EMAIL PROTECTED] wrote: From: Gene Heskett <[EMAIL PROTECTED]> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Subject: Re: [Emc-users] Stepper speed Date: Mon, 10 Mar 2008 13:46:42 -0400 On Monday 10 March 2008, [EMAIL PROTECTED] wrote: >Gene, > >I may have to investigate adding dampers like you have done. I didn't >consider adding it between the motor and the machine. I had always seen >dampers on the back side of the steppers. > >Jim C > Those aren't dampers on the work end of the motor, those are the slip joint couplings I made by hand as nearly the first parts that mill made. The dampers are the striped things on the rear. A drum to hold all the washers with the flange as part of the barrel on one end, and a collar to retain the washers on the other end. Alternating fender washers with a 5/8" hole, and some sort of a fairly dead rubber sheet cut into washers with only about a 1/2" hole, so the rubber expands sideways and lightly grips the fender washers when forced over the 5/8" partion of the drum. > > >------------------------------------------------------------------------- >This SF.net email is sponsored by: Microsoft >Defy all challenges. Microsoft(R) Visual Studio 2008. >http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ >_______________________________________________ >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) MSDOS didn't get as bad as it is overnight -- it took over ten years of careful development. -- [EMAIL PROTECTED] ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
