Re: Machine flex; How much is to much?

Alan,

No its not. But it is very similar to an RF-31

Trevor

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Alan Marconett KM6VV
<KM6VV@a...> wrote:

> Hi Trevor,
>
> Is that an RF-31 mill that you purchased in Salinas?
>
> Alan KM6VV
>
> protman16 wrote:
> >
> > Group,
> >
> > I have just completed converting a mill/drill to cnc. It has a

belt

> > driven spindle with a round column. For the z-axis I replaced the
> > riser casting with THK LM slides that now allow the mill to have
> > about 11" of travel. There are a couple of reasons why I did this.
> > First is that 5" travel is too short most jobs that I run, second

is

> > that when boring using the quill there is too much flex resulting

in

> > elliptical holes (same applies for side milling).
> > Currently I have not measured the amount deflection but I will
> > attempt to very soon.
> > My question is to the group what amount of cutter/spindle

deflection

> > is acceptable on this type of mill that still provides reasonable
> > accuracy and good repeatability?
> >
> > Trevor