The problem with all these gearboxes, sprokets chains and belts, is each mechanical transmission joint you add adds lash to the system, not to mention more things to wear out. Add this to the fact that large wood routers like this need to move fast and I think he is much better off sticking with what he has.
I think that if the motors he has have indexes, I would think that some setup homing to index would be best. After making sure the index points on both motors are set so they are at the point where the gantry is square. Some experimentation will be reqired of course to see how best to impliment this. With a bit of clevverness it might be able to work with trivkins. The real trick might be tuning the servos. ----- Original Message ----- From: "Gregg Eshelman" <g_ala...@yahoo.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Friday, May 24, 2013 1:51:05 AM Subject: Re: [Emc-users] gantry revisited Another way to mechanically connect the ends of any gantry. Fit a rack along each side. Mount a vertical shaft on each end with a gear at the bottom to engage the racks. At the top ends of the shafts, mount right angle gearboxes with a cross shaft connecting them. If the underside of the table is clear, with part of the gantry running below it, then there are arrangements of cables and pulleys that make it always stay square. The original Thermwood control system never had a problem with the gantry trying to get crooked. Perhaps digging into its system could yield some useful information? Is this retrofit a complete one, motors, drives and all? Or is it leaving the motors and drives and replacing the computer? Just wondering if the never-fail keep it square system had nothing to do with the controlling system but was built into the drive system? If you've replaced *everything* electronic and electrical on the machine, then you've removed the 'magic' system that kept the gantry square. ------------------------------------------------------------------------------ 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
