The idea of using belts, and gearboxes, and rack and pinions, sounds like a bad recipe.
While I did suggest a bar across the gantry, the problem is that you're carrying all those gears, and the motor. I drew a quick concept sketch of how I would do it. Buy cut-to-length belt, probably HTD M5 x 30mm wide for your application. I think this would be quite adequate for a wood router. At the far end of the table, connect the two idler pulleys with a shaft too. Obviously all the pulleys and motors will be below the table height. And; - motor is no longer on the gantry - no skew can happen - easy to get your drive ratio - single motor http://imgbox.com/ccZJF5nH On Thu, 4 Oct 2018 at 17:41, Leonardo Marsaglia <ldmarsag...@gmail.com> wrote: > Hello Les, > > No, I plan to support 50 mm bars every 600 mm more or less. I'm attaching > some pictures of the design I'm working on. (The adjustable stands for > levelling are not in the assembly because I'm saving resources on this > laptop) > > I like the idea of using the rectangular ways but unfortunately they are > quite expensive for this project and also there's the aligning problem. > With the setup I'm trying to do I can adjust the parallelism on every > corner of the machine and also individually adjust every suport to level > the guides perfectly. I'm sending pictures of everything to clarify what > I'm intending to do. Please note this is under development and some things > are going to change a little bit. > > The idea of welding the frame is out of discussion because I plan to move > and set up this thing in place. Also, I don't have the means to guarantee a > clean and squared welding for the frame. Instead I decided to do what you > can see in the pictures, having an enormous amount of bolts to keep the > parts rigid and firm. > > No problem about using tubing to lower the inertia. I also thought about > reducing the 3000 max RPM with the worm and gear to 100 RPM on the shaft > and then increase the size of the pinions to have the linear speed I want. > This way the long shaft doesn't have to withstand the high RPMs. > > I uploaded the pictures because the list doesn't allow me to attach them. > Here's the link: > > https://imgur.com/a/7kLUWsq > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
