On 17 February 2012 03:20, gene heskett <ghesk...@wdtv.com> wrote: > On Thursday, February 16, 2012 08:16:36 PM Steve Blackmore did opine: > > > On Wed, 15 Feb 2012 16:29:36 -0500, you wrote: > > >The plastic, except for temporary fitting wouldn't do for permanent as > > >it will be trapped between the spindle preload nut, and it's locking > > >nut in normal operation. That is driven tight with a drift punch in > > >the nut slots. The plastic will 'cold flow', loosening the nut, and > > >that won't be good for things. > > > > The Al flanged bush I have fitted could be made of steel and would > > permit a preload nut. It's 5mm thick turned with a flange. The spindle > > is 40mm dia, the bush is 50mm + a 10mm flange (70mm total OD). The > > flange is drilled and tapped with 5 holes on a 55mm PCD. The encoder > > disk is bored 50mm and fixed to the flange with countersunk 3mm screws. > > > > In my case the preload nuts are inside the headstock casting so it > > didn't need to be anything special, just had to hold the encoder wheel > > true and in a fixed position relative the spindle. > > > That sounds like the only thing in common is that the spindle shaft has > bearings. :) Your sound like a real machine, but I think Toys would be > done a disservice when I call mine a toy. > > > The lathe has an encoder fitted as standard driven by a timing belt 1:1, > > but the encoder is noisy. I had all the materials handy so it was simple > > and cheap to make one as a temporary fix. Never got around to finding a > > suitable replacement at the right price and to be honest, I stopped > > looking as it works so well. > > > Its amazing how a little thought often comes up with a better idea than > OEM, and you can get away with that every place but in the military. :( > > > Steve Blackmore > > -- > > >
Hi Gene I can't recall what material you ended up using, but did you look at using that clear disc that comes in most DVD packs? Maybe you could mill grooves, run black paint over it, then buff the excess off. Regards Roland ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
