On Thursday 07 November 2013 11:04:12 andy pugh did opine:
> On 7 November 2013 01:11, <tcninj...@yahoo.com> wrote:
> > why doesn't someone try turning the nut not the screw? Bridgeport
> > bosses X axis screw was bolted to the end of the table
>
> I actually rather like this arrangement, and have used it in two
> places on my mill.
> Z:
> https://picasaweb.google.com/lh/photo/GkFZLDkk88gzRy9NWh16s9MTjNZETYmyP
> Jy0liipFm0?feat=directlink This has the nut above the cabinet base (in
> the original location) and the motor inside the cabinet. Drive to the
> nut is through a tube coaxial with the screw.
>
> X:
> https://picasaweb.google.com/lh/photo/oLM693wLua_FB8juhNe26tMTjNZETYmyP
> Jy0liipFm0?feat=directlink This took rather a lot of engineering,
> requiring a very custom timing pulley, which required me to set up to
> hob my own timing pulleys. The vernier-slotted preload adjusting rings
> are locked with a wire spring clip in a manner stolen from Ducati rear
> wheels.
Now this one I am tempted to try in my toy mill as there isn't room enough
between the XY tables to fit a cage for the .750" diameter nut of an
8mmx2.5" ball screw. I do have room for it to project as that is all under
the keyboard shelf. Now to see if any of those are left.
Cheers, Gene
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
You can't have your cake and let your neighbor eat it too.
-- Ayn Rand
A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
law-abiding citizens.
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