Re: [CAD_CAM_EDM_DRO] Re: Ball screws for CNC plasma cutters

Hello Rick here comes the Hamburger-Hotdog design,

I'll better compare it this way to save me some time to make a sketch and scan it with the fax.
But imagine that your nut is round and sliced in the middle like a hamburger.
In spite of meat you put a sausage in the middle. Which is the screw.
The springs squeeze the nut half's together like your hands the bread.
And the cylinder is like a can you stuff your hamburger into. It wouldn't let the nut come out
horizontally but allows to compense misalignments in the rotary axis and height.
I hope this helps.
Sven Peter

"Rich D." wrote:

> Sven,
> It looks as tho you have something very useful here, but I am having great difficulty
> visualizing what you describe.
> Could you upload a drawing or sketch to the group's "Files" on Yahoo?
> Regards, Rich D.
>
> "Sven Peter, TAD S.A." wrote:
> >
> > Hey Smoke,
> > there is a much better way to get rid of back lash.
> > What you propose always will have the back lash as soon you force the nut.
> > I apply frequently the self adjusting system my italian lathe has. (Last time adjusted 4 years ago:
> > back lash in the beginning 0,01mm, now 0,04mm on radius)
> > Ok: where you screw normally the nut to the cross way, you put an accurate cylinder with
> > slots were the screw passes through.
> > The acme nut you make has to be sloppy on the screw and has to have the groove tip narrower than normal. The out side form is
> > cylindrical and has to fit perfectly in this cylinder.
> > Out side of the thread from the top you make 2 or 4 threads passing through, drill open until the height of the thread and counter
> > bore the diameter of the head of the allan screws nearly to the depth of the drilled part ( about 4 or 5 mm less). Until now you
> > part the nut horizontally on the center line of the thread with a saw type slot mill (width 2,5 to 3,5mm depending on the size of
> > the scew). Don't forget a oil hole.
> > The nut you assemble with springs below the allan screw heads. After playing a little you find out what is the right spring pressure
> > and all backlash that will be left is the play between the nut outside and the capture cylinder. The nut moves smooth and will
> > collapse on the worn parts of the screw.
> >
> > Of cause you are able to use the same system on a normal screw. And this is not invented it is working really good.
> >
> > Good luck
> > Sven Peter
> >
> > Smoke wrote:
> SNIP>>>>
>
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