> On Saturday 28 October 2017 08:29:38 Nicklas SB Karlsson wrote: > > > > ... > > > > > > > It might be a good idea to turn by hand and check if load is same > > > > in both direction. To run motor without load in both directions is > > > > also a good idea. > > > > > > From the hand on the spindle test, or from the top of the tight > > > drawbolt it turns with equal ease in both directions. > > > > Then I think to check voltage is same in both directions is next step. > > > > On my first machine at home one of the joints is very hard to turn by > > hand. There are basically sliding surfaces so not much could be wrong > > but it still pussle me how I should pin point the problem, any idea? > > > Gibs too tight? No lube? If ball nuts, miss-aligned because the bearing > boss on the end of the table has slid a few thou as it was being torqued > up?
Gibs too tight might be the problem, I will try to losen bolts. I added lube externally manually and it made no difference. > > My little hf x1 (retrofitted with the bigger tables) has to be screwed > completely in before the bearing bosses are tightened down so they are > aligned well. They've been fitted with ball thrust washers but the > bearings are the original zero clearance, so any nut miss alignment even > though they are tiny ball screws is pretty critical because it makes > that bearing at the end of the table bind pretty bad. In addition to > drilling out the mounting holes about 20 thou so they could move to > align with the new nuts, I drilled them for grease fittings, but the > shaft clearance is so small it takes minutes to push 1/4 of a stroke of > the grease gun in. A teeny little groove will get machined to match the > pinhole the next time I have it apart. Hind sight, 20-10. :) > > Cheers Nicklas, 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> > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
