On Friday 20 November 2015 10:47:15 andy pugh wrote: > On 20 November 2015 at 15:30, Gene Heskett <ghesk...@wdtv.com> wrote: > > I have probably worn off an eighth of an > > inch off the nose of the compound feed since it usually hangs out in > > front of the saddle. Just one of the reasons I have considered > > removing it and replacing it with a block of steel > > Right and below-centre in this photo > https://picasaweb.google.com/lh/photo/gQuPtDB0J_ZiqVVDHaf8vtMTjNZETYmy >PJy0liipFm0?feat=directlink Is the pattern that I am taking to the > foundry tomorrow to make just such a block for my Holbrook.
Looks quite a bit more complex than what I had in mind. I assume you are doing a ball screw conversion from the saddle up, using a much smaller, geared down motor that will be hidden behind the apron. I thought of using a 52 oz single stack thats not quite a nema 23, but bigger than a 17. It could do the job with enough gear down, but that might limit the G76 entry/exit ramp rate. It did not have the cojones to drive the screw direct. Currently that 525 oz seems to work well, with a triple stack 23 direct on the screw, but hanging off the rear of the saddle & wanting to lift the front way from the V-Way as its too darned heavy and too far back. But if I shorten that, then there really is not room for the back of the compound, and I've crushed the swarf covers on the cross-feed several times with the rear of the compound. Shuffling motors around to free up one of the double stack 252 oz motors would probably be a better deal as that would lose half a pound or more of overhanging weight. That alone would set it more firmly on its only V-Way. But there's that missing round tuit again. 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> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
