Re: [CAD_CAM_EDM_DRO] antibacklash nut concept for mini mills...thoughts??

I thought about the spring loaded idea but i dont want
to make any major mods to my mill. i was hoping to get
rid of the backlash without milling out a hole in the
saddle large enough for a spring loaded nut. without
the mill in one peice icant do anything as i dont have
access to another mill to do so.
i have DRO's but am wanting to convert to cnc without
the overwhelming cost of ballscrews to get rid of
backlash. guess i will have to give Ebay a visit.

thanks for the suggestion though
--- Jon Elson <elson@...> wrote:

> Kayla Sanders wrote:
>
> > do you guys think this would work?
> > all you would have to doto impliment this concept
> is to either use
> > a set screw or long bolt long enough to screw into
> the existing hole
> > that locks the nut in place, and that would also
> go into the brass
> > nut and apply pressure against the back section of
> the nut(this
> > would ensure that the nut will not turn,and get
> rid of the backlash
> > all in one shot), seperating the nut in the middle
> ,eliminating the
> > backlash. or use a set screw in the nut and
> tighten it through the
> > existing threaded hole in the saddle.
> > personally, i like the first one because it takes
> care of two birds
> > with one stone.
> > you can adjust it as it wears the threads, to
> compensate.
> >
> > the image of what im talking about is in the
> photos section,
> > titled "No backlash nut.jpg"
>
> The problem with this is that it will wear the screw
> and nuts pretty
> fast. Most well-used screws have the thread a
> little thinner
> in the middle, so a spring-load arrangement would
> work.
>
> Maybe if there was no wear in one part of the screw,
> you could set this
> type of device for some very small backlash, and it
> wouldn't increase
> screw wear. That might work pretty well. Backlash
> compensator nuts
> are used on some higher-end tools, such as my
> Sheldon lathe.
>
> Jon
>
>
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