Of course the shaft is hollow.(the actual pinion shaft is only half inch, this is a light duty machine) It would be silly to have a solid shaft that long.
----- Original Message ----- From: "Gregg Eshelman" <g_ala...@yahoo.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Friday, May 24, 2013 1:39:30 AM Subject: Re: [Emc-users] gantry revisited --- On Thu, 5/23/13, Todd Zuercher <zuerc...@embarqmail.com> wrote: > We have about a half dozen old gantry > routers that work this way. Rack and pinion drive, > with a 2" diameter shaft connecting the 2 pinion gears about > 10 feet apart. Not the most elegant solution, but it > works. (one is currently for sale) The biggest problem > with the design is clearance for the shaft, either the racks > and shaft need to be above the table or below. Above > is simplest, but gets in the way accessing the work space. Hollow shaft? Hollow, larger diameter shafts can be much stiffer with less weight than a smaller diameter, solid shaft. That's why drive shafts for rear wheel drive, front engine vehicles are 3~4" diameter and made of quite thin metal. ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
