Pity you can't wait for some hardware. There are some good ideas here: www.theinturn.com and several "developmental" stage videos by Simpsons36 on youTube. Nice bit of kit, and servo driven at quite a speed.
Marcus On 24 Jul 2014, at 21:23, Gene Heskett wrote: > On Thursday 24 July 2014 15:12:50 Marius Liebenberg did opine > And Gene did reply: >> On 2014-07-24 21:06, andy pugh wrote: >>> On 24 July 2014 19:43, Marius Liebenberg <mar...@mastercut.co.za> > wrote: >>>> Has any one done this before. I have a rotational fourth axis that >>>> has a stepper and the rest of the system is servo based. Is there >>>> an example or some direction from the coven? :) >>> >>> It should be straightforward, especially if 500 steps per second is >>> enough. >>> >>> What hardware? >> >> I am going to put the stepper on the parport with a cheap bob. The rest >> is 5i23 with 7i77. We have to swing the rotary axis at a fairly fast >> pace as they want to cut 3D stuff with it. > > That could be a limitation then. Most tables have a worm drive that may or > may not be sloppy, and has something like a 90/1 ratio, so real speed > means the motor must turn lickety split. I'd imagine you customer would > be far better served with a custom belt driven table with a much lower > "gear ratio" than a std rotary table. Tight timing belts will have better > rotational accuracy than my own motorized POS $100 table can do. > > 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 > > ------------------------------------------------------------------------------ > Want fast and easy access to all the code in your enterprise? Index and > search up to 200,000 lines of code with a free copy of Black Duck > Code Sight - the same software that powers the world's largest code > search on Ohloh, the Black Duck Open Hub! Try it now. > http://p.sf.net/sfu/bds > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
