Maybe I'm not visualizing the setup of this machine but it seems like it might be easier to use two motors utilizing the existing racks. Of course that would probably require planetary gear boxes on the servos with a 2 inch pinion.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ "Anyone who believes exponential growth can go on forever in a finite world is either a madman or an economist." -Kenneth Boulding, economist “How unfortunate that the Earth’s first intelligent social animal is a tribal carnivore” -E.O. Wilson, sociobiologist > > > >________________________________ > From: Todd Zuercher <zuerc...@embarqmail.com> >To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net> >Sent: Friday, June 13, 2014 3:08 PM >Subject: Re: [Emc-users] Ball Screw Drive? > > >A picture is worth a thousand words. I've attached a photo of the back of the >machine. Linik to a photo of the front. >http://www.linuxcnc.org/media/kunena/attachments/legacy/images/0701111753a__800x600_.jpg > The machine is mostly constructed from aluminum extrusions, sized 4X8 inch >with a half inch wall thickness. Inside each of these extrusions at the >center of each 4 inch side is a 1 inch deep "U" that is often tapped for >bolting pieces together. I do not know the construction of the 2.5 inch >diameter torque tube, it is ferrous and hollow, (no idea what wall thickness). > I would guess it weighs about 20-30 lbs. > > >----- Original Message ----- >From: "Bas de Bruijn" <bdebru...@luminize.nl> >To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> >Sent: Friday, June 13, 2014 7:24:15 AM >Subject: Re: [Emc-users] Ball Screw Drive? > > > >> On 13 Jun 2014, at 12:50, andy pugh <bodge...@gmail.com> wrote: >> >>> On 13 June 2014 11:25, Bas de Bruijn <bdebru...@luminize.nl> wrote: >>> >>> It would help, but the axis between the gears would have to be very >>> rigid, >> >> Well, as it was originally designed for the task, you would hope it >> was rigid enough. > >Yes, but that would be driving the axis directly, and not with the frame and >the gear in between. It's not so hard to calculate the angle of rotation with >a given torque. > >Todd, what would be the geometry of the axis? Tube or solid rod? What's the >outer diameter, And if a tube, what's the wall thickness (approx is good enough) > > >> >> -- >> atp >> If you can't fix it, you don't own it. >> http://www.ifixit.com/Manifesto >> >> ------------------------------------------------------------------------------ >> HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions >> Find What Matters Most in Your Big Data with HPCC Systems >> Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. >> Leverages Graph Analysis for Fast Processing & Easy Data Exploration >> http://p.sf.net/sfu/hpccsystems >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > >------------------------------------------------------------------------------ >HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions >Find What Matters Most in Your Big Data with HPCC Systems >Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. >Leverages Graph Analysis for Fast Processing & Easy Data Exploration >http://p.sf.net/sfu/hpccsystems >_______________________________________________ >Emc-users mailing list >Emc-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/emc-users > > >------------------------------------------------------------------------------ >HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions >Find What Matters Most in Your Big Data with HPCC Systems >Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. >Leverages Graph Analysis for Fast Processing & Easy Data Exploration >http://p.sf.net/sfu/hpccsystems > >_______________________________________________ >Emc-users mailing list >Emc-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing & Easy Data Exploration http://p.sf.net/sfu/hpccsystems _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
