On Friday 13 June 2014 20:04:04 Greg Bernard did opine And Gene did reply: > 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.
Definitely will need some sort of geardown. My thoughts would go to supporting the middle of that cross-shaft in a good bearing, and putting the single motor there, with a 17 to 49 or so timing belt drive, well tensioned for minimum effective backlash. That would be a lot cheaper than planetary gears I'd think. With the pinions spring loaded into the rack, it should work pretty good assuming the rack is adequately shielded from swarf. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS ------------------------------------------------------------------------------ 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
